Enhancing nitrogen removal through macrophyte harvest and installation of woodchips-based floating beds in surface-flow constructed wetlands

refereedrefRefereedRefereegranskatFagfellevurdertarticleartArticle in journalArtikel i tidskriftArtikkel i tidsskriftarticleChoudhuryMaidul I.autLinnaeus University, Kalmar, Sweden; Vattenfall Ab, Stockholm, Swedenorcid.org=0000-0002-2321-4058NilssonJosefin1994-autHögskolan i Halmstad, Akademin för företagande, innovation och hållbarhetUppsala University, Uppsala, Swedendiva-portal.org=authority-person:74445HylanderSamuelautLinnaeus University, Kalmar, SwedenHauberMarcautLinnaeus University, Kalmar, SwedenEhdePer Magnus1956-autHögskolan i Halmstad, Akademin för företagande, innovation och hållbarhetorcid.org=0000-0003-4297-8683diva-portal.org=authority-person:33704WeisnerStefan1954-autHögskolan i Halmstad, Akademin för företagande, innovation och hållbarhetorcid.org=0000-0002-5181-0391diva-portal.org=authority-person:33703LiessAntonia1975-autHögskolan i Halmstad, Akademin för företagande, innovation och hållbarhetorcid.org=0000-0003-1556-3861diva-portal.org=authority-person:55556Högskolan i HalmstadAkademin för företagande, innovation och hållbarhetpblEnhancing nitrogen removal through macrophyte harvest and installation of woodchips-based floating beds in surface-flow constructed wetlandsengOxfordElsevier20242024-06-05T13:53:00https://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-5335010.1016/j.chemosphere.2024.142284387191242-s2.0-85192322081142284https://doi.org/10.1016/j.chemosphere.2024.142284textAquatic plantsFloating wetlandsNitrogen uptakeWetland biofilmWetland restorationNatural SciencesBiological SciencesNaturvetenskapBiologiska vetenskaperPROACTSResearch subjectPROACTSResearch subjectWetland management maintains nitrogen (N) removal capacity in mature and overgrown constructed wetlands (CWs). We evaluated whether CW management by macrophyte harvesting, and subsequent installation of woodchips-based floating beds (WFBs) planted with Glyceria maxima and Filipendula ulmaria improved N removal. In sixteen heavily overgrown experimental CWs, we applied four treatments: i) only macrophyte harvesting, ii) 5% of the harvested-CW surface covered with WFBs, iii) 20% WFBs cover, and iv) a control treatment (heavily overgrown). N removal was determined in all wetlands at nine occasions. Plant biomass accrual, N assimilation, and denitrification genes nirS, nirK, nosZI and nosZII on plant roots and woodchips from WFBs were estimated. Macrophyte harvesting improved N removal of heavily overgrown CWs, whereas subsequent WFB installation only sometimes improved N removal. Mean N removal efficiencies (± standard deviation) overall were 41 ± 15 %, 45 ± 20 %, 46 ± 16 % and 27 ± 8.3 % for treatments i to iv, respectively. Relative biomass production, root length and root surface area for G. maxima (mean ± standard deviation: 234 ± 114 %, 40 ± 6.5 cm, 6308 ± 1059 cm2g-1, respectively) were higher than those for F. ulmaria (63 ± 86 %, 28 ± 12 cm, 3131 ± 535 cm2g-1, respectively) whereas biomass N assimilation was higher for F. ulmaria (1.8 ± 0.9 gNm−2 of WFB) than for G. maxima (1.3 ± 0.5 gNm−2 of WFB). Denitrification gene abundance was higher on plant roots than on woodchips while G. maxima hosted higher root denitrification gene abundance than F. ulmaria. We conclude that macrophyte harvesting improves N removal in heavily overgrown CWs. WFBs installation has the potential to support plant growth and denitrification in surface-flow constructed wetlands. Further studies need to evaluate the long-term effects of macrophyte harvesting and WFB installation on N removal in CWs. © 2024 The AuthorsThis study was funded by Stiftelsen Oscar och Lili Lamms Minne (grant no. FO2019-0012) to MC and SH and a grant for eutrophication prevention (övergödningsåtgärder anslag 1:11) from Vattenmyndigheten Västerhavet to AL. AL, JN, SW and PME were supported by the Swedish Environmental Protection Agency [grant number 19/114]. We thank Matyas Baan for field and laboratory assistance, Kuno Kasak and Mikk Espenberg for supporting qPCR analysis, and Halmstad University and Linnaeus University for support and use of facilities.Chemosphere0045-65351879-1298359PublishedLinnéuniversitetetHögskolan i HalmstadNaturvårdsverket [19/114]ninnrunhh2024-06-052024-10-10diva2:1865794refereedrefRefereedRefereegranskatFagfellevurdertarticleartArticle in journalArtikel i tidskriftArtikkel i tidsskriftarticleMartensMireilleautWater Technology Group, HZ University of Applied Sciences, Vlissingen, the NetherlandsKarlssonNiklas1985-autHögskolan i Halmstad, Rydberglaboratoriet för tillämpad naturvetenskap (RLAS)orcid.org=0000-0003-3068-5269diva-portal.org=authority-person:59325EhdePer Magnus1956-autHögskolan i Halmstad, Rydberglaboratoriet för tillämpad naturvetenskap (RLAS)orcid.org=0000-0003-4297-8683diva-portal.org=authority-person:33704MattssonMarie1960-autHögskolan i Halmstad, Rydberglaboratoriet för tillämpad naturvetenskap (RLAS)orcid.org=0000-0001-9157-7400diva-portal.org=authority-person:33691WeisnerStefan1954-autHögskolan i Halmstad, Rydberglaboratoriet för tillämpad naturvetenskap (RLAS)orcid.org=0000-0002-5181-0391diva-portal.org=authority-person:33703Högskolan i HalmstadAkademin för företagande, innovation och hållbarhetRydberglaboratoriet för tillämpad naturvetenskap (RLAS)pblThe greenhouse gas emission effects of rewetting drained peatlands and growing wetland plants for biogas fuel productionengAmsterdamElsevier20212020-10-26T11:17:00https://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-4334010.1016/j.jenvman.2020.111391330496110005939744000092-s2.0-85092313103111391https://doi.org/10.1016/j.jenvman.2020.111391textPaludicultureGreenhouse gas emissionsPeatlandPhragmites australisTypha latifoliaBiomethaneNatural SciencesEarth and Related Environmental SciencesEnvironmental SciencesNaturvetenskapGeovetenskap och miljövetenskapMiljövetenskapNatural SciencesEarth and Related Environmental SciencesClimate ScienceNaturvetenskapGeovetenskap och relaterad miljövetenskapKlimatvetenskapEfforts to mitigate greenhouse gas (GHG) emissions are receiving increased attention among governmental and commercial actors. In recent years, the interest in paludiculture, i.e. the use of rewetted peatlands, has grown because of its potential to reduce GHG emissions by stopping soil decomposition. Moreover, cultivating wetland plants on rewetted peatlands for bioenergy production that replaces fossil fuels in the transport sector, can contribute to additional GHG emission reductions. In this study, an analysis of literature data was conducted to obtain data on GHG emissions (CO2 and CH4) and biomass production from rewetted peatlands cultivated with two different wetland plant species: Phragmites australis (Pa) and Typha latifolia (Tl). In addition, a biogas experiment was carried out to investigate the biomethane yield of Pa and Tl biomass, and the reduction of global warming potential (GWP) by using biomethane as vehicle fuel. The results show that peatland rewetting can be an important measure to mitigate the GWP as it reduces GHG emissions from the soil, particularly on a 100-year timescale but also to some extent on a 20-year timescale. More specifically, rewetting of 1 km2 of peatland can result in a GWP reduction corresponding to the emissions from ±2600 average sized petrol cars annually. Growing Pa on rewetted peatlands reduces soil GHG emissions more than growing Tl, but Pa and Tl produced similar amounts of biomass and biomethane per land area. Our study concludes that Pa, because of a more pronounced GWP reduction, is the most suitable wetland plant to cultivate after peatland rewetting. © 2020 The Author(s). Published by Elsevier Ltd.Journal of Environmental Management0301-47971095-8630277PublishedForskningsrådet Formas [155-2014-1745]https://hh.diva-portal.org/smash/get/diva2:1479185/FULLTEXT01.pdfprojectproject:264nikkarhh2020-10-262025-02-01diva2:1479185refereedrefRefereedRefereegranskatFagfellevurdertarticleartArticle in journalArtikel i tidskriftArtikkel i tidsskriftarticleEllerFranziskaautDepartment of Biology, Aarhus University, Aarhus, Denmarkorcid.org=0000-0003-3065-6038EhdePer Magnus1956-autHögskolan i Halmstad, Rydberglaboratoriet för tillämpad naturvetenskap (RLAS)orcid.org=0000-0003-4297-8683diva-portal.org=authority-person:33704OehmkeClaudiaaut Institute of Botany and Landscape Ecology, Partner in the Greifswald Mire Center, University of Greifswald, Greifswald, Germanyorcid.org=0000-0002-7150-6266RenLinjingautDepartment of Biology, Aarhus University, Aarhus, Denmark & Biocenter Klein Flottbek, Hamburg University, Hamburg, Germanyorcid.org=0000-0002-0120-4385BrixHansautDepartment of Biology, Aarhus University, Aarhus, Denmarkorcid.org=0000-0003-2771-2983SorellBrian K.autDepartment of Biology, Aarhus University, Aarhus, Denmarkorcid.org=0000-0002-2460-8438WeisnerStefan1954-autHögskolan i Halmstad, Rydberglaboratoriet för tillämpad naturvetenskap (RLAS)orcid.org=0000-0002-5181-0391diva-portal.org=authority-person:33703Högskolan i HalmstadAkademin för företagande, innovation och hållbarhetRydberglaboratoriet för tillämpad naturvetenskap (RLAS)pblBiomethane yield from different European Phragmites australis genotypes, compared with other herbaceous wetland species grown at different fertilization regimesengBaselMDPI20202020-05-15T12:12:00https://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-4205510.3390/resources90500570005410180000092-s2.0-8508563974357https://doi.org/10.3390/resources9050057textArundo donaxbiogaspaludiculturepretreatmentsustainable agriculture Typha angustifoliaTypha latifoliaEngineering and TechnologyIndustrial BiotechnologyBioenergyTeknik och teknologierIndustriell bioteknikBioenergiPhragmites australis, Typha latifolia, T. angustifolia and Arundo donax are tall wetland graminoids with the potential to replace fossil fuels under sustainable cultivation conditions. We investigated the biomethane (CH4) production of these four species, including four different genotypes of P. australis, which represent the high intraspecific diversity of European reed. All plants were grown under three different macronutrient supplies (no nutrients added, an equivalent of 75 kg N ha−1 year−1 added and an equivalent of 500 kg N ha−1 year−1 added). Biomethane production was measured in four independent batch digestion tests. Across all experiments, fertilization regime had little effect on CH4 yield, which was on average 222 ± 31 L kg−1 volatile solids (VS). The lowest yield was produced by T. angustifolia (140 L kgVS−1) receiving no nutrients, while the highest yield was produced by A. donax (305 L kgVS−1) in the highest nutrient treatment. The intraspecific diversity of P. australis did not affect biomethane production. All P. australis genotypes produced on average 226 ± 19 L CH4 kgVS−1, which, although high, was still lower than conventional biogas species. The biomass production of P. australis was less increased by fertilization than that of Typha sp. and A. donax, but all species had similar biomass without fertilization.This article belongs to the Special Issue Sustainable and Innovative Utilization of Common Reed (Phragmites Australis) in the Bioeconomy.'Other funders: FACCE-JPI ERA-NET Plus on Climate Smart Agriculture (project CINDERELLA), the Carlsberg Foundation, grant number CF15-0330, the German Federal Minister of Education and Research under Project Number 031A545.Resources2079-927695PublishedForskningsrådet Formas [155-2014-1745]projectproject:264stewehh2020-05-152021-10-20diva2:1430521refereedrefRefereedRefereegranskatFagfellevurdertarticleartArticle in journalArtikel i tidskriftArtikkel i tidsskriftarticleNilssonJosefin E.1994-autHögskolan i Halmstad, Rydberglaboratoriet för tillämpad naturvetenskap (RLAS)orcid.org=0000-0001-7049-7444diva-portal.org=authority-person:74445LiessAntonia1975-autHögskolan i Halmstad, Rydberglaboratoriet för tillämpad naturvetenskap (RLAS)orcid.org=0000-0003-1556-3861diva-portal.org=authority-person:55556EhdePer Magnus1956-autHögskolan i Halmstad, Rydberglaboratoriet för tillämpad naturvetenskap (RLAS)orcid.org=0000-0003-4297-8683diva-portal.org=authority-person:33704WeisnerStefan E.B.1954-autHögskolan i Halmstad, Rydberglaboratoriet för tillämpad naturvetenskap (RLAS)orcid.org=0000-0002-5181-0391diva-portal.org=authority-person:33703Högskolan i HalmstadAkademin för företagande, innovation och hållbarhetRydberglaboratoriet för tillämpad naturvetenskap (RLAS)pblMature wetland ecosystems remove nitrogen equally well regardless of initial plantingengAmsterdamElsevier20202020-02-28T09:31:00https://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-4172110.1016/j.scitotenv.2020.137002320361310005199873000992-s2.0-85078896215137002https://doi.org/10.1016/j.scitotenv.2020.137002textCreated wetlandNitrogen removalNutrient retentionPhragmites australisLong-term studyDenitrificationNatural SciencesBiological SciencesEcologyNaturvetenskapBiologiska vetenskaperEkologiRestored and constructed semi-natural wetlands are increasingly used in the agricultural landscape to intercept nutrients from surface waters. Vegetated surface-flow wetlands remove more nitrogen (N) than those without vegetation. However, changes in N removal over time as differently vegetated wetlands progress from early successional stages to mature systems are less investigated. We monitored three different types of initial planting over the course of 12 years, with the aim to examine how planting of newly constructed wetlands affects long-term N removal. All our data were collected in an experimental wetland facility in south-western Sweden. The facility consists of 18 identical small (ca. 25 m2) surface-flow wetlands, simulating semi-natural wetlands in an agricultural landscape. Initially, the 18 wetlands were randomly divided into three treatments (vegetation types) with six replicates each and planted with (1) emergent vegetation, (2) submerged vegetation and (3) no vegetation for free development. Vegetation succession afterwards progressed uninhibited in all wetlands. Emergent vegetation wetlands initially removed more N than both submerged vegetation and free development wetlands. We found that N removal in submerged vegetation and free development wetlands increased with ecosystem age, whereas N removal in emergent vegetation wetlands did not. N removal in all three vegetation types converged when the wetlands reached a more mature state, around 8 years after wetland construction. However, although all wetlands contained emergent vegetation in year 8, the proportion of emergent vegetation cover and vegetation composition still differed substantially between wetland types. Our study indicates that it is not the cover of emergent vegetation per se which promotes higher N removal in more mature wetlands, but the maturation process itself; mature wetlands despite differing emergent vegetation coverage achieved equally high N removal. In conclusion, once wetlands reach maturity, beneficial effects of initial planting on N removal disappear. © 2020 The Authors. Published by Elsevier B.V.Other funding: Halmstad UniversityScience of the Total Environment0048-96971879-1026716PublishedForskningsrådet FormasMistra - Stiftelsen för miljöstrategisk forskningjosenihh2020-02-282021-10-25diva2:1401969sciencevetOther academicÖvrigt vetenskapligtAnnet vitenskapeligconferencePaperkonConference paperKonferensbidragKonferansepaperproceedingabstractsNilssonJosefin E.1994-autHögskolan i Halmstad, Rydberglaboratoriet för tillämpad naturvetenskap (RLAS)Linnaeus University, Kalmar, SwedenWetland centreorcid.org=0000-0001-7049-7444diva-portal.org=authority-person:74445Wetland centreothResearch GroupLiessAntonia1975-autHögskolan i Halmstad, Rydberglaboratoriet för tillämpad naturvetenskap (RLAS)Wetland centreorcid.org=0000-0003-1556-3861diva-portal.org=authority-person:55556Wetland centreothResearch GroupEhdePer Magnus1956-autHögskolan i Halmstad, Rydberglaboratoriet för tillämpad naturvetenskap (RLAS)Wetland centreorcid.org=0000-0003-4297-8683diva-portal.org=authority-person:33704Wetland centreothResearch GroupWeisnerStefan1954-autHögskolan i Halmstad, Rydberglaboratoriet för tillämpad naturvetenskap (RLAS)Wetland centerorcid.org=0000-0002-5181-0391diva-portal.org=authority-person:33703Wetland centerothResearch GroupHögskolan i HalmstadAkademin för företagande, innovation och hållbarhetRydberglaboratoriet för tillämpad naturvetenskap (RLAS)pblWill planting of surface-flow wetlands improve nitrogen removal in the long run?engAarhusAarhus Universitetsforlag20192019-12-04T14:06:00978-87-971486-0-0978-87-971486-1-7https://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-41116textNatural SciencesEarth and Related Environmental SciencesPhysical GeographyNaturvetenskapGeovetenskap och miljövetenskapNaturgeografiInitial planting of created wetlands is common practice in order to, for instance, improve nitrogen (N) removal. It has been shown that vegetated surface-flow wetlands remove more N than non-vegetated surface-flow wetlands. However, changes in N removal as differently vegetated wetlands progress from an early successional stage to a mature system are less investigated.In our study, we followed three different wetland types of initial planting over the course of 12 years, with the aim to examine how planting of newly created wetlands affects long-term N removal. All our data were collected in the experimental wetland facility near Halmstad in south-western Sweden. The facility consist of 18 small (ca. 25 m2) surface-flow wetlands, equal in age, shape and size. At the time of creation, the 18 wetlands were randomly divided into three types. One type was then planted with emergent vegetation, one was planted with submerged vegetation and the last type was left unplanted for free development. Succession of vegetation was thereafter allowed to progress uninhibited in all wetlands.Our results confirmed that emergent vegetation wetlands initially removed more N than submerged vegetation and free development wetlands. In addition, our results showed that N removal in submerged vegetation and free development wetlands increased with ecosystem age, whereas N removal in emergent vegetation wetlands did not. N removal in all three wetland vegetation types converged when the wetlands reached a more mature state, around year 9 after wetland creation. However, although all wetlands contained emergent vegetation in year 9, proportion cover of emergent vegetation and vegetation composition still differed substantially between wetland types.We therefore conclude planting of created surface-flow wetlands with emergent vegetation will have a positive effect on N removal, but only during an early successional stage. Our study indicates it is not the emergent vegetation per se which results in higher N removal in more mature wetlands, but the maturation process in itself, since mature wetlands with different emergent vegetation cover achieved similar N removal. Initial planting will not result in higher N removal once the system has reached maturity.Book of Abstracts8th International Symposium on Wetland Pollutant Dynamics and Control. 17 – 21 June, 2019. Aarhus University, Denmark340340Carlos A. Arias, Carlos A. Ramírez-Vargas, Lorena Peñacoba-Antona & Hans Brix8th International Symposium on Wetland Pollutant Dynamics and Control, Wetpol 2019, Aarhus, Denmark, June 17-21, 2019antliehh2019-12-042019-12-17diva2:1375284refereedrefRefereedRefereegranskatFagfellevurdertarticleartArticle in journalArtikel i tidskriftArtikkel i tidsskriftarticleSongXiaojunautHögskolan i Halmstad, Akademin för ekonomi, teknik och naturvetenskapSchool of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou, ChinaEhdePer Magnus1956-autHögskolan i Halmstad, Rydberglaboratoriet för tillämpad naturvetenskap (RLAS)orcid.org=0000-0003-4297-8683diva-portal.org=authority-person:33704WeisnerStefan1954-autHögskolan i Halmstad, Rydberglaboratoriet för tillämpad naturvetenskap (RLAS)orcid.org=0000-0002-5181-0391diva-portal.org=authority-person:33703Högskolan i HalmstadAkademin för ekonomi, teknik och naturvetenskappblHögskolan i HalmstadAkademin för företagande, innovation och hållbarhetRydberglaboratoriet för tillämpad naturvetenskap (RLAS)pblEffects of Water Depth and Phosphorus Availability on Nitrogen Removal in Agricultural WetlandsengBaselMDPI20192019-12-10T11:17:00https://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-4120810.3390/w111226260005073786001982-s2.0-850796108432626https://doi.org/10.3390/w11122626textfree water surface wetlandsagricultural runoffnitrogen removalwater depthphosphorusEngineering and TechnologyCivil EngineeringWater EngineeringTeknik och teknologierSamhällsbyggnadsteknikVattenteknikExcess nitrogen (N) from agricultural runoff is a cause of pollution inaquatic ecosystems. Created free water surface (FWS) wetlands can be used as buffering systems to lower the impacts of nutrients from agricultural runoff. The purpose of this paper was to evaluate critical factors for N removal in FWSwetlands receiving high nitrate (NO3−) loads from agriculture. The study was performed in 12 experimental FWS wetlands in southern Sweden, receiving drainage water from an agricultural field area. The effects of water depth (mean depth of 0.4 m and 0.6 m, respectively) and phosphorus (P) availability (with or without additional P load) were investigated from July to October. The experiment was performed in a two-way design, with three wetlands of each combination of depth and P availability. The effects of P availability on the removal of NO3− and total N were strongly significant, with higher absolute N removal rates per wetland area (g m−2 day−1) as well as temperature-adjusted first-order area-based removal rate coefficients (Kat) in wetlands with external P addition compared to wetlands with no addition. Further, higher N removal in deep compared to shallow wetlands was indicated by statistically significant differences in Kat. The results show that low P availability may limit N removal in wetlands receiving agricultural drainage water. Furthermore, the results support that not only wetland area but also wetland volume may be important for N removal. The results have implications for the planning, location, and design of created wetlands in agricultural areas. © 2019 by the authorsWater2073-44411112Publishedhttps://hh.diva-portal.org/smash/get/diva2:1376748/FULLTEXT01.pdfstewehh2019-12-102023-08-28diva2:1376748refereedrefRefereedRefereegranskatFagfellevurdertconferencePaperkonConference paperKonferensbidragKonferansepaperproceedingabstractsBodinHristinaautDivision of Natural Sciences, Kristianstad University, Kristianstad, SwedenEhdePer Magnus1956-autHögskolan i Halmstad, Rydberglaboratoriet för tillämpad naturvetenskap (RLAS)orcid.org=0000-0003-4297-8683diva-portal.org=authority-person:33704WeisnerStefan1954-autHögskolan i Halmstad, Rydberglaboratoriet för tillämpad naturvetenskap (RLAS)orcid.org=0000-0002-5181-0391diva-portal.org=authority-person:33703Högskolan i HalmstadAkademin för företagande, innovation och hållbarhetRydberglaboratoriet för tillämpad naturvetenskap (RLAS)pblAttenuation of Pharmaceutical SubstancesPhytoremediation using Constructed Wetlandseng20182018-09-24T13:24:00https://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-38046textEngineering and TechnologyCivil EngineeringWater EngineeringTeknik och teknologierSamhällsbyggnadsteknikVattenteknikIntroduction: Currently, wastewater treatment plants (WWTPs) do not efficiently remove pharmaceutical substances (PS). Thus, such substances are now frequently found in aquatic ecosystems worldwide. Also, concentrations of some PS in treated effluents exceed Environmental Quality Standards proposed by EU legislation. One resource-efficient option for increasing PS removal in WWTP effluents is to use constructed wetlands (CWs) as an attenuation step (Breitholtz et al. 2012; Li et al. 2014). However, very little research has been done on how to maximize the PS attenuation capacity of CWs. Therefore, a project with the aim to investigate reduction of different pharmaceutical substances in CWs with different vegetation compositions and water depths, was performed at the Experimental Wetland Area (EVA) located 20 km north of Halmstad, Sweden. This work was financially supported by the Crafoord Foundation [grant number 20140950], The Royal Swedish Academy of Agriculture and Forestry [grant number H14-0049-CFH and H14-0049-AKF] and Magnus Bergvalls Foundation [grant number 2015-00818].13th Society of Wetland Scientists (SWS) Europe Chapter MeetingManagement of Wetland Ecosystem Services: Issues, Challenges and Solutions192213th SWS Europe Chapter Meeting, Ohrid, Macedonia, April 30-May 4, 2018Crafoordska stiftelsen [20140950]Magnus Bergvalls Stiftelse [2015-00818]https://hh.diva-portal.org/smash/get/diva2:1250536/FULLTEXT01.pdfstewehh2018-09-242018-09-26diva2:1250536refereedrefRefereedRefereegranskatFagfellevurdertarticleartArticle in journalArtikel i tidskriftArtikkel i tidsskriftarticleJohannessonKarin M.1982-autIFM Biology, Linköping University, Linköping, Swedendiva-portal.org=authority-person:61556TonderskiKarin S.autIFM Biology, Linköping University, Linköping, SwedenEhdePer Magnus1956-autHögskolan i Halmstad, Rydberglaboratoriet för tillämpad naturvetenskap (RLAS)orcid.org=0000-0003-4297-8683diva-portal.org=authority-person:33704WeisnerStefan E. B.1954-autHögskolan i Halmstad, Rydberglaboratoriet för tillämpad naturvetenskap (RLAS)orcid.org=0000-0002-5181-0391diva-portal.org=authority-person:33703Högskolan i HalmstadAkademin för företagande, innovation och hållbarhetRydberglaboratoriet för tillämpad naturvetenskap (RLAS)pblTemporal phosphorus dynamics affecting retention estimates in agricultural constructed wetlandsengAmsterdamElsevier20172017-05-22T14:47:00https://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-3387410.1016/j.ecoleng.2015.11.0500004028308000142-s2.0-84949654372textConstructed wetlandsAgricultural catchmentsFlow–concentration relationshipsPhosphorus retention estimatesSampling strategyNatural SciencesEarth and Related Environmental SciencesNaturvetenskapGeovetenskap och relaterad miljövetenskapData from seven constructed wetlands (CWs) in the south of Sweden were analyzed to investigate the effects of water flow and season on inflow phosphorus (P) concentrations and temporal P retention variations in CWs receiving runoff from arable land. The form of P (dissolved or particulate) during different water flows (high and low) and seasons (warm and cold) was investigated using the results of total P (TP) and phosphate analyzed in grab samples that had been collected regularly or occasionally during two to nine years, along with continuous water flow measurements.The form of inflow and outflow P (particulate or dissolved P) differed between CWs, and also varied with season and flow. For instance, in three of the CWs, particulate P (PP) dominated the inflow during the cold period with high flow, while during the other periods the proportion of PP was approximately 50%. In one CW situated in a catchment with high clay content, PP dominated both inflow and outflow at all times. The average clay content in catchment top soils was positively correlated to the flow-weighted inflow TP concentrations.In three CWs receiving runoff through drainage pipes, the relationship between TP concentrations (TPin) and water flow was positive, both during high and low flow, and during warm and cold period. However, in four CWs that received surface water runoff, the relationship between TPin and water flow was positive during high flow periods (i.e. the 25% sampling occasions with the highest flow), and during low flow and warm period, the relationship was negative in these four wetlands, indicating either anoxic stagnant water upstream or influence from rural wastewater.The temporal dynamics of P concentrations mean that in some of the CWs, the main part of the annual P retention may occur during a few days with high water flows. The correlation between concentration and water flow suggests that the water sampling strategy may have a considerable impact on retention estimates, as exemplified by some calculation examples. © 2015 Elsevier B.V.Additional financiers: Federation of Swedish Farmers (LRF), Bertebos foundation & Sparbanksstiftelsen KronanEcological EngineeringThe Journal of Ecotechnology0925-85741872-6992103Part B436445PublishedForskningsrådet FormasMistra - Stiftelsen för miljöstrategisk forskningstewehh2017-05-222025-02-07diva2:1097291refereedrefRefereedRefereegranskatFagfellevurdertarticleartArticle in journalArtikel i tidskriftArtikkel i tidsskriftarticleWeisnerStefan1954-autHögskolan i Halmstad, Rydberglaboratoriet för tillämpad naturvetenskap (RLAS)orcid.org=0000-0002-5181-0391diva-portal.org=authority-person:33703JohannessonKarin1982-autIFM Biology, Linköping University, Linköping, Swedendiva-portal.org=authority-person:61556ThiereGeraldine1978-autHögskolan i Halmstad, Rydberglaboratoriet för tillämpad naturvetenskap (RLAS)diva-portal.org=authority-person:61629SvengrenHenrikautHögskolan i Halmstad, Rydberglaboratoriet för tillämpad naturvetenskap (RLAS)diva-portal.org=authority-person:61592EhdePer Magnus1956-autHögskolan i Halmstad, Rydberglaboratoriet för tillämpad naturvetenskap (RLAS)orcid.org=0000-0003-4297-8683diva-portal.org=authority-person:33704TonderskiKarin S.1958-autIFM Biology, Linköping University, Linköping, Swedenorcid.org=0000-0002-0722-6083diva-portal.org=authority-person:23801Högskolan i HalmstadAkademin för företagande, innovation och hållbarhetRydberglaboratoriet för tillämpad naturvetenskap (RLAS)pblNational Large-Scale Wetland Creation in Agricultural Areas—Potential versus Realized Effects on Nutrient TransportsengBaselMDPI20162016-11-24T17:40:00https://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-3248310.3390/w81105440003896607000672-s2.0-85003678467544https://doi.org/10.3390/w8110544textconstructed wetlandsnitrogenphosphorusremovalretentioncatchmentsEngineering and TechnologyCivil EngineeringWater EngineeringTeknik och teknologierSamhällsbyggnadsteknikVattenteknikDuring 2007–2013, the Swedish Board of Agriculture granted support within a national program to about 1000 wetlands, corresponding to a 5300-hectare wetland area, with the dual goal to remove nutrients from water and to improve biodiversity in agricultural landscapes. The aim of the present study was to compare the effects on nutrient transports that are realized within the national program to what could be obtained with the same area of wetlands if location and design of wetlands were optimized. In single, highly nutrient-loaded wetlands, a removal of around 1000 kg nitrogen and 100 kg phosphorus per hectare wetland area and year was estimated from monitoring data. Statistical models were developed to estimate the overall nutrient removal effects of wetlands created within the national program. Depending on model, the effect of the national program as a whole was estimated to between 27 and 38 kg nitrogen and between 2.7 and 4.5 kg phosphorus per hectare created wetland area and year. Comparison of what is achieved in individual wetlands to what was achieved in the national program indicates that nutrient removal effects could be increased substantially in future wetland programs by emphasising location and design of wetlands.Water2073-4441811Publishedhttps://hh.diva-portal.org/smash/get/diva2:1049520/FULLTEXT01.pdfstewehh2016-11-242023-08-28diva2:1049520refereedrefRefereedRefereegranskatFagfellevurdertarticleartArticle in journalArtikel i tidskriftArtikkel i tidsskriftarticleBerglundBjörnautLinköping University, Division of Medical Microbiology, Department of Clinical and Experimental Medicine, Linköping, SwedenKhanGhazanfar AliautDepartment of Chemistry, Umeå University, Umeå, SwedenWeisnerStefan1954-autHögskolan i Halmstad, Våtmarkscentrumorcid.org=0000-0002-5181-0391diva-portal.org=authority-person:33703EhdePer Magnus1956-autHögskolan i Halmstad, Våtmarkscentrumorcid.org=0000-0003-4297-8683diva-portal.org=authority-person:33704FickJerkerautDepartment of Chemistry, Umeå University, Umeå, SwedenLindgrenPer-EricautLinköping University, Division of Medical Microbiology, Department of Clinical and Experimental Medicine, Linköping, SwedenHögskolan i HalmstadAkademin för ekonomi, teknik och naturvetenskapBio- och miljösystemforskning (BLESS)MiljövetenskapVåtmarkscentrumpblEfficient removal of antibiotics in surface-flow constructed wetlands, with no observed impact on antibiotic resistance genesengAmsterdamElsevier20142014-04-22T15:40:54https://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-2513310.1016/j.scitotenv.2013.12.128244480290003337725000042-s2.0-84892640876textAntibiotic resistance genesAntibioticsQuantitative real-time PCRConstructed wetlandsNatural SciencesOther Natural SciencesNaturvetenskapAnnan naturvetenskapRecently, there have been growing concerns about pharmaceuticals including antibiotics as environmental contaminants. Antibiotics of concentrations commonly encountered in wastewater have been suggested to affect bacterial population dynamics and to promote dissemination of antibiotic resistance. Conventional wastewater treatment processes do not always adequately remove pharmaceuticals causing environmental dissemination of low levels of these compounds. Using constructed wetlands as an additional treatment step after sewage treatment plants have been proposed as a cheap alternative to increase reduction of wastewater contaminants, however this means that the natural microbial community of the wetlands becomes exposed to elevated levels of antibiotics. In this study, experimental surface-flow wetlands in Sweden were continuously exposed to antibiotics of concentrations commonly encountered in wastewater. The aim was to assess the antibiotic removal efficiency of constructed wetlands and to evaluate the impact of low levels of antibiotics on bacterial diversity, resistance development and expression in the wetland bacterial community. Antibiotic concentrations were measured using liquid chromatography-mass spectrometry and the effect on the bacterial diversity was assessed with 16S rRNA-based denaturing gradient gel electrophoresis. Real-time PCR was used to detect and quantify antibiotic resistance genes and integrons in the wetlands, during and after the exposure period. The results indicated that the antibiotic removal efficiency of constructed wetlands was comparable to conventional wastewater treatment schemes. Furthermore, short-term treatment of the constructed wetlands with environmentally relevant concentrations (i.e. 100-2000 ng x 1(-1)) of antibiotics did not significantly affect resistance gene concentrations, suggesting that surface-flow constructed wetlands are well-suited for wastewater treatment purposes. (c) 2014 Elsevier B.V. All rights reserved.This project was funded by the Swedish Research Council for Environment, Agricultural Sciences and Spatial Planning (Formas, contract number 210-2006-2132).Science of the Total Environment0048-96971879-1026476-4772937PublishedFormas [210-2006-2132]stewehh2014-04-222017-12-05diva2:713326sciencevetOther academicÖvrigt vetenskapligtAnnet vitenskapeligconferencePaperkonConference paperKonferensbidragKonferansepaperproceedingpublishedPaperWaaraSylvia1958-autHögskolan i Halmstad, Våtmarkscentrumorcid.org=0000-0003-0553-7918diva-portal.org=authority-person:33771GajewskaMagdalenaautGdańsk University of Technology, Gdańsk, PolandDvarionieneJolantaautKaunas University of Technology, Kaunas, LithuaniaEhdePer Magnus1956-autHögskolan i Halmstad, Våtmarkscentrumorcid.org=0000-0003-4297-8683diva-portal.org=authority-person:33704GajewskiRyszardautGdańska Infrastructura Wodociągowo-Kanalizacyjna, Gdańsk, PolandGrabowskiPawelautGrupa Lotos, Gdańsk, PolandHanssonAnna1984-autHögskolan i Halmstad, Våtmarkscentrumorcid.org=0000-0002-2848-7717diva-portal.org=authority-person:33766KaszubowskiJacekautGdańska Infrastructura Wodociągowo-Kanalizacyjna, Gdańsk, PolandObarska-PempkowiakHannaautGdańsk University of Technology, Gdańsk, PolandPrzewlóckaMariaautGdańsk University of Technology, Gdańsk, PolandPileckiAdamautGrupa Lotos, Gdańsk, PolandNagórka-KmiecikDagmaraautCity Hall of Gdańsk, Environment Department , Gdańsk, PolandSkarbekJacekautGdańska Infrastructura Wodociągowo-Kanalizacyjna, Gdańsk, PolandTonderskiKarinautLinköping University, Linköping, SwedenWeisnerStefan1954-autHögskolan i Halmstad, Våtmarkscentrumorcid.org=0000-0002-5181-0391diva-portal.org=authority-person:33703WojciechowskaEwaautGdańsk University of Technology, Gdańsk, PolandHögskolan i HalmstadAkademin för ekonomi, teknik och naturvetenskapBio- och miljösystemforskning (BLESS)MiljövetenskapVåtmarkscentrumpblTowards Recommendations for Design of Wetlands for Post-Tertiary Treatment of Waste Water in the Baltic Sea Region – Gdańsk Case Studyeng20142015-01-02T14:38:00https://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-2737710.13140/2.1.1140.5123https://doi.org/10.13140/2.1.1140.5123textdischarge limitsecosystem servicessustainable citiestreatment wetlandswaste waterEngineering and TechnologyEnvironmental EngineeringEnvironmental ManagementTeknikNaturresursteknikMiljöteknik och miljöledningThere are many challenges that need to be addressed if the far reaching objectives on high environmental status as required in the EU Water Framework Directive and the Marine Strategy Framework Directive will be met in the Baltic Sea Region within the next decade. For wastewater treatment plants (WWTP) this implies, in spite of the many improvements made during the last decade, development and introduction of new technology to further reduce eutrophying compounds, hazardous chemicals and pharmaceuticals. Constructed wetlands when properly designed and operated have been shown to be robust systems with low energy requirements that may not only reduce many types of pollutants but may also provide many additional ecosystem services beyond requirements generally imposed by authorities. For example, they may support and enhance biodiversity and be used to convert brownfield areas in urban landscapes to recreational areas. Reduced cost is possible if treated water is reused in industry or for irrigation. In a project, supported by the Swedish Institute, a group of scientists, a water company and water using industry has together with local authorities through workshops, field studies and literature studies worked on finding a general first recommendation on design and operation. In this paper we will present the scientific rational and legal constraints for the general design and operation of a wetland system for post-tertiary treatment of waste water from WWTPs using Gdańsk as an example. The proposal includes a first part, which mainly will be focusing on pollutant and pathogen removal using particle traps and a HSSF wetland on land owned by the WWTP and a second part consisting of a FWS wetland which, in addition to further polishing the water, will enhance biodiversity and provide recreational areas on derelict land owned by the city.Financial support: Swedish InstituteWETEFF: Towards recommendation for design, operation and monitoring of constructed wetlands for treatment of effluent from waste water treatment plants in the Baltic Sea Region</titleInfo></relatedItem><name type="conference"><namePart>Linneaus Eco-Tech '14, Kalmar, Sweden, 24-26 November, 2014</namePart></name><location><url displayLabel="fulltext:print" note="free" access="raw 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type="publicationTypeCode">article</genre><genre authority="svep" type="publicationType">art</genre><genre authority="diva" type="publicationType" lang="eng">Article in journal</genre><genre authority="diva" type="publicationType" lang="swe">Artikel i tidskrift</genre><genre authority="diva" type="publicationType" lang="nor">Artikkel i tidsskrift</genre><genre authority="kev" type="publicationType" lang="eng">article</genre><name type="personal"><namePart type="family">Bodin</namePart><namePart type="given">Hristina</namePart><role><roleTerm type="code" authority="marcrelator">aut</roleTerm></role><affiliation>Linköping University, Linköping, Sweden</affiliation></name><name type="personal" authority="hh" xlink:href="annmie"><namePart type="family">Mietto</namePart><namePart type="given">Anna</namePart><namePart type="date">1979-</namePart><role><roleTerm type="code" authority="marcrelator">aut</roleTerm></role><affiliation>University of Padova, Legnaro, Italy</affiliation><description>diva-portal.org=authority-person:61652</description></name><name type="personal" authority="hh" xlink:href="pema"><namePart type="family">Ehde</namePart><namePart type="given">Per Magnus</namePart><namePart type="date">1956-</namePart><role><roleTerm type="code" authority="marcrelator">aut</roleTerm></role><affiliation>Högskolan i Halmstad, Våtmarkscentrum</affiliation><description>orcid.org=0000-0003-4297-8683</description><description>diva-portal.org=authority-person:33704</description></name><name type="personal"><namePart type="family">Persson</namePart><namePart type="given">Jesper</namePart><role><roleTerm type="code" authority="marcrelator">aut</roleTerm></role><affiliation>Swedish University of Agricultural Sciences, Alnarp, Sweden</affiliation></name><name type="personal" authority="hh" xlink:href="stewe"><namePart type="family">Weisner</namePart><namePart type="given">Stefan</namePart><namePart type="date">1954-</namePart><role><roleTerm type="code" authority="marcrelator">aut</roleTerm></role><affiliation>Högskolan i Halmstad, Våtmarkscentrum</affiliation><description>orcid.org=0000-0002-5181-0391</description><description>diva-portal.org=authority-person:33703</description></name><name type="corporate" authority="hh" xlink:href="3914"><namePart>Högskolan i Halmstad</namePart><namePart>Akademin för ekonomi, teknik och naturvetenskap</namePart><namePart>Bio- och miljösystemforskning (BLESS)</namePart><namePart>Miljövetenskap</namePart><namePart>Våtmarkscentrum</namePart><role><roleTerm type="code" authority="marcrelator">pbl</roleTerm></role></name><titleInfo lang="eng"><title>Tracer behaviour and analysis of hydraulics in experimental free water surface wetlandsengAmsterdamElsevier20122012-09-12T13:16:00https://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-1958210.1016/j.ecoleng.2012.07.0090003209311000292-s2.0-84868624908textData analysisFree water surface wetlandsGauss modellingHydraulic performanceInletLithium tracerVegetationNatural SciencesEarth and Related Environmental SciencesEnvironmental SciencesNaturvetenskapGeovetenskap och miljövetenskapMiljövetenskapEffects of inlet design and vegetation type on tracer dynamics and hydraulic performance were investigated using lithium chloride in 18 experimental free water surface wetlands. The wetlands received similar water flow but had different vegetation types: 6 emergent vegetation wetlands (EVWs), 6 submerged vegetation wetlands (SVWs) and 6 free development wetlands (FDWs). Two types of inlet designs were applied: half of each wetland vegetation type had a barrier near the inlet to help distribute incoming tracer solution, while the rest had no barrier. Residence time distribution (RTD) functions were calculated from tracer data using two techniques: method of moments and a novel Gauss modelling approach. RTD functions were used to quantify hydraulic parameters: active wetland volume (e-value), water dispersion (N-value) and hydraulic efficiency (lambda-value). For wetlands without barrier, significantly lower tracer mass recoveries were found from EVWs compared to FDWs and SVWs, signifying a risk of tracer methodological problems in small densely vegetated wetlands. These problems were minimized in wetlands with an inflow construction promoting distribution of incoming tracer solution. Compared to the method of moments, Gauss modelling seemed to produce more reliable lambda-values but less reliable N-values. Data for precise hydraulic quantification were lost by Gauss modelling, as indicated by overall lower variance in these data sets and lower mass recoveries. However, Gauss modelling may minimize uncertainties associated with lithium immobilization/mobilization. Parameters were significantly affected by the RTD data analysis method, showing that the choice of method could affect evaluation of wetland hydraulics. The experimental wetlands in this study exhibited relatively high e-values and low N-values. This was probably caused by the small size of the wetlands and low water flow velocities, emphasizing that hydraulic parameter values obtained in small experimental wetlands may not be applicable to hydraulics in larger wetlands. The method of moments revealed lower e-values from EVWs compared to SVWs and FDWs. It was indicated that lower e-values were mainly caused by vegetation volumes. This highlighted a need for regular maintenance to secure efficient treatment volume in wetlands with dense vegetation. © 2012 Elsevier B.V.Ecological EngineeringThe Journal of Ecotechnology0925-85741872-699249201211Publishedstewehh2012-09-122018-03-22diva2:551957sciencevetOther academicÖvrigt vetenskapligtAnnet vitenskapeligmanuscriptovrManuscript (preprint)Manuskript (preprint)Manuskript (preprint)preprintJohannessonKarin1982-autInstitutionen för fysik, kemi och biologi, Ekologi, Linköpings universitet, Linköping, Sverigediva-portal.org=authority-person:61556TonderskiKarinautInstitutionen för fysik, kemi och biologi, Ekologi, Linköpings universitet, Linköping, Sverigeorcid.org=0000-0002-0722-6083diva-portal.org=authority-person:23801WeddingBengtautEkologgruppen i Landskrona AB, Landskrona, SverigeEhdePer MagnusautHögskolan i Halmstad, Våtmarkscentrumorcid.org=0000-0003-4297-8683diva-portal.org=authority-person:33704WeisnerStefanautHögskolan i Halmstad, Våtmarkscentrumorcid.org=0000-0002-5181-0391diva-portal.org=authority-person:33703Högskolan i HalmstadAkademin för ekonomi, teknik och naturvetenskapBio- och miljösystemforskning (BLESS)MiljövetenskapVåtmarkscentrumpblPhosphorus load variations and retention in non-point source wetlands in southern Swedeneng20112012-12-14T13:15:00978-91-7393-168-7https://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-20141textEngineering and TechnologyCivil EngineeringTeknik och teknologierSamhällsbyggnadsteknikNatural SciencesPhysical SciencesNaturvetenskapFysikNATURAL SCIENCESBiologyTerrestrial, freshwater and marine ecologyFreshwater ecologyNATURVETENSKAPBiologiTerrestrisk, limnisk och marin ekologiLimnisk ekologiData from seven constructed wetlands receiving runoff from agricultural catchments in the south of Sweden were investigated with respect to phosphorus (P) retention. The seven wetlands differed in size (0.22-2 ha), design, land use and catchment characteristics. The hydraulic load varied between 7 and 725 m yr-1, which reflect the different geographical and hydrological conditions. The overall aim of this study was to increase the understanding of how water flow and inflow P concentration varations affect the P retention in constructed wetlands receiving runoff from arable land. Water flow was measured continuously, and time or flow proportional water samples were taken. Grab samples were taken during high flow periods and also to supplement the automatic water sampling. P retention varied between wetlands, from 1 to 58 kg ha-1 yr-1, and was correlated to the P load (R2=0.9, p<0.05). P retention in the wetlands varied strongly between years, and negative retention was recorded for some years and wetlands. When investigating monthly retention for each wetland, release of P corresponded to either high flow or possible anoxic conditions during low-flow periods in summer or during winter when ice covered the wetlands. Analyses of grab samples revealed a relationship between TP concentration and water flow for most wetlands. In some wetlands, P was transported mainly as particulate P (PP), but in other wetlands, soluble P was the dominating form in both inflow and outflow. Incoming concentrations varied greatly between wetlands (1-2000 μg l-1) which reflected the different catchment characteristics, e.g. land use, soil type and topography.stewehh2012-12-142022-09-13diva2:577098refereedrefRefereedRefereegranskatFagfellevurdertconferencePaperkonConference paperKonferensbidragKonferansepaperproceedingpublishedPaperWeisnerStefanautHögskolan i Halmstad, Våtmarkscentrumorcid.org=0000-0002-5181-0391diva-portal.org=authority-person:33703MiettoAnnaautHögskolan i Halmstad, Våtmarkscentrumdiva-portal.org=authority-person:61652EhdePer MagnusautHögskolan i Halmstad, Våtmarkscentrumorcid.org=0000-0003-4297-8683diva-portal.org=authority-person:33704PerssonJesperautSwedish University of Agricultural Sciences, Alnarp, SWEDENHögskolan i HalmstadAkademin för ekonomi, teknik och naturvetenskapBio- och miljösystemforskning (BLESS)MiljövetenskapVåtmarkscentrumpblInfluence of vegetation on hydraulics in experimental surface-flow wetlandseng20092010-09-27T16:27:00978-84-692-5587-2https://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-5995textEngineering and TechnologyEnvironmental EngineeringTeknik och teknologierNaturresursteknikEngineering and TechnologyMechanical EngineeringTeknik och teknologierMaskinteknikNATURAL SCIENCESNATURVETENSKAP3rd Wetland Pollutant Dynamics and Control - WETPOL 2009 - Barcelona179180Josep M. Bayona & Joan García3rd International Symposium on Wetland Pollutant Dynamics and Control - WETPOL 2009, Barcelona, Spainhttps://hh.diva-portal.org/smash/get/diva2:353153/FULLTEXT01.pdfstewehh2010-09-242022-09-13diva2:353153refereedrefRefereedRefereegranskatFagfellevurdertconferencePaperkonConference paperKonferensbidragKonferansepaperproceedingpublishedPaperEhdePer MagnusautHögskolan i Halmstad, Våtmarkscentrumorcid.org=0000-0003-4297-8683diva-portal.org=authority-person:33704WeisnerStefanautHögskolan i Halmstad, Våtmarkscentrumorcid.org=0000-0002-5181-0391diva-portal.org=authority-person:33703Högskolan i HalmstadAkademin för ekonomi, teknik och naturvetenskapBio- och miljösystemforskning (BLESS)MiljövetenskapVåtmarkscentrumpblThe influence of vegetation on nitrogen retention in a long-term experimental wetland studyeng20092010-09-27T15:54:00978-84-692-5587-2https://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-5996textMedical and Health SciencesHealth SciencesMedicin och hälsovetenskapHälsovetenskaperEngineering and TechnologyMechanical EngineeringTeknik och teknologierMaskinteknikNATURAL SCIENCESNATURVETENSKAPProceedings on CDProceedings of the 3rd Wetland Polluntat Dynamics and Control - WETPOL 2009 - Barcelona197198Josep M. Bayona & Joan García3rd International Symposium on Wetland Pollutant Dynamics and Control - WETPOL 2009, 20-24 september, 2009, Barcelona, Spainhttps://hh.diva-portal.org/smash/get/diva2:353154/FULLTEXT01.pdfstewehh2010-09-242022-09-13diva2:353154refereedrefRefereedRefereegranskatFagfellevurdertarticleartArticle in journalArtikel i tidskriftArtikkel i tidsskriftarticleKallner BastvikenSofiaautIFM Biology, Linköping University, Campus Valla, SwedenWeisnerStefan E.B.autHögskolan i Halmstad, Våtmarkscentrumorcid.org=0000-0002-5181-0391diva-portal.org=authority-person:33703ThiereGeraldineautHögskolan i Halmstad, Våtmarkscentrumdiva-portal.org=authority-person:61629SvenssonJonas M.autHögskolan i Halmstad, Våtmarkscentrumdiva-portal.org=authority-person:61591EhdePer MagnusautHögskolan i Halmstad, Våtmarkscentrumorcid.org=0000-0003-4297-8683diva-portal.org=authority-person:33704TonderskiKarin S.autIFM Biology, Linköping University, Campus Valla, SwedenHögskolan i HalmstadAkademin för ekonomi, teknik och naturvetenskapBio- och miljösystemforskning (BLESS)MiljövetenskapVåtmarkscentrumpblEffects of vegetation and hydraulic load on seasonal nitrate removal in treatment wetlandsengAmsterdamElsevier20092009-05-28T08:19:00https://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-249710.1016/j.ecoleng.2009.01.0010002661387000362-s2.0-646490834802082/2899textHydraulic loadRemoval rate coefficientSeasonVegetationWetland nitrate removalNatural SciencesBiological SciencesNaturvetenskapBiologiska vetenskaperNatural SciencesEarth and Related Environmental SciencesNaturvetenskapGeovetenskap och relaterad miljövetenskapNATURAL SCIENCESNATURVETENSKAPOptimising nitrate removal and identifying critical factors for nitrate removal in wetlands is an important environmental task in the effort to achieve better surface water quality. In this study, eighteen free water surface wetlands with similar shape and size (22 m2 each) received groundwater with a high nitrate-N concentration (about 11 mg l−1). The effects of two hydraulic loads, 0.13 m d−1 and 0.39 m d−1, and three vegetation types – emergent, submersed and freely developing vegetation – on the nitrate-N removal were investigated through mass inflow and outflow measurements.No significant difference in nitrate removal between the different hydraulic loads could be detected. Significantly higher area-specific nitrate removal and first-order area-based rate coefficients were found in the basins with emergent vegetation, with no difference between the basins with submersed and freely developing vegetation. The nitrate-N removal increased as the wetlands matured and the vegetation grew denser, emphasizing the role of dense emergent vegetation for nitrate removal at high nitrate concentrations.Ecological EngineeringThe Journal of Ecotechnology0925-85741872-6992355946952Publishedimporthh2009-05-282025-01-31diva2:239715sciencevetOther academicÖvrigt vetenskapligtAnnet vitenskapeligconferencePaperkonConference paperKonferensbidragKonferansepaperproceedingpublishedPaperWeisnerStefan E.BautHögskolan i Halmstad, Våtmarkscentrumorcid.org=0000-0002-5181-0391diva-portal.org=authority-person:33703Bastviken KallnerSofiaautDepartment of Biology, Linköping UniversityThiereGeraldineautHögskolan i Halmstad, Våtmarkscentrumdiva-portal.org=authority-person:61629EhdePer MagnusautHögskolan i Halmstad, Våtmarkscentrumorcid.org=0000-0003-4297-8683diva-portal.org=authority-person:33704TonderskiKarin S.autDepartment of Biology, Linköping UniversityHögskolan i HalmstadAkademin för ekonomi, teknik och naturvetenskapBio- och miljösystemforskning (BLESS)MiljövetenskapVåtmarkscentrumpblInfluence of alternative states on nitrogen removal in experimental wetlandsengTartuInstitute of Geography, University of Tartu20072009-02-06T12:20:00978-9949-11-688-1https://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-22492082/2651textPublicationes Instituti Geographici Universitatis Tartuensis1406-3069104wetlandsNatural SciencesEarth and Related Environmental SciencesNaturvetenskapGeovetenskap och relaterad miljövetenskapEngineering and TechnologyCivil EngineeringTeknik och teknologierSamhällsbyggnadsteknikNATURAL SCIENCESNATURVETENSKAPDenitrification is the main process that remove nitrate from the water in wetlands. Plants can supply denitrifying bacteria with organic carbon and suitable attachment surfaces (Weisner et al. 1994). They also promote the development of anaerobic conditions through litter accumulation and decomposition, which would favour denitrification. The presence of plants has been shown to enhance nitrate removal in field studies (Bachand and Horne 2000). Toet et al. (2005) found a higher nitrogen removal in wetland compartments with emergent plants than with submersed plants. Results from microcosm studies have shown that the potential for denitrification is specific for different plant species (Bastviken et al. 2005).Wetlands may typically exist in alternative states, dominated by different kinds of vegetation. The purpose of this study was to investigate the effect of alternative state on nitrogen removal under controlled conditions in experimental wetlands.2nd International Symposium on Wetland Pollutant Dynamics and Control - WETPOL 2007extended abstracts357359Mander Ülo, Koiv Margi, Vohla Chrisitna2nd International Symposium on Wetland Pollutant Dynamics and Control - WETPOL 2007https://hh.diva-portal.org/smash/get/diva2:239467/FULLTEXT01.pdfimporthh2009-02-062025-01-31diva2:239467sciencevetOther academicÖvrigt vetenskapligtAnnet vitenskapeligconferencePaperkonConference paperKonferensbidragKonferansepaperproceedingpublishedPaperEhdePer MagnusautHögskolan i Halmstad, Våtmarkscentrumorcid.org=0000-0003-4297-8683diva-portal.org=authority-person:33704WeisnerStefanautHögskolan i Halmstad, Våtmarkscentrumorcid.org=0000-0002-5181-0391diva-portal.org=authority-person:33703Högskolan i HalmstadAkademin för ekonomi, teknik och naturvetenskapBio- och miljösystemforskning (BLESS)MiljövetenskapVåtmarkscentrumpblNutrient retention in constructed wetlands in an agricultural landscape in southwest SwedenengTartuUniversity of Tartu20072010-09-24T14:05:00https://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-6000textPublicationes Instituti Geographici Universitatis Tartuensis1406-3069104Natural SciencesEarth and Related Environmental SciencesNaturvetenskapGeovetenskap och relaterad miljövetenskapNatural SciencesBiological SciencesNaturvetenskapBiologiska vetenskaperNATURAL SCIENCESNATURVETENSKAP2nd International Symposium on Wetland Pollutant Dynamics and Control - WETPOL 2007extended abstracts91922nd International Symposium on Wetland Pollutant Dynamics and Control - WETPOL 2007, Tartu, Estonia, September 16-20, 2007stewehh2010-09-242025-01-31diva2:353214sciencevetOther academicÖvrigt vetenskapligtAnnet vitenskapeligconferencePaperkonConference paperKonferensbidragKonferansepaperproceedingpublishedPaperWeisnerStefan E.B.autHögskolan i Halmstad, Våtmarkscentrumorcid.org=0000-0002-5181-0391diva-portal.org=authority-person:33703StrandJohn A.autHögskolan i Halmstad, Våtmarkscentrumdiva-portal.org=authority-person:61571SahlénGöranautHögskolan i Halmstad, Våtmarkscentrumorcid.org=0000-0002-7840-6460diva-portal.org=authority-person:55885ThiereGeraldineautHögskolan i Halmstad, Våtmarkscentrumdiva-portal.org=authority-person:61629EhdePer MagnusautHögskolan i Halmstad, Våtmarkscentrumorcid.org=0000-0003-4297-8683diva-portal.org=authority-person:33704SvenssonJonas M.autHögskolan i Halmstad, Våtmarkscentrumdiva-portal.org=authority-person:61591Högskolan i HalmstadAkademin för ekonomi, teknik och naturvetenskapBio- och miljösystemforskning (BLESS)MiljövetenskapVåtmarkscentrumpblCombating eutrophication and biodiversity loss in Swedenimportance of constructed wetlands in the agricultural landscapeengPaduaPAN20072008-09-09T11:07:00978-88-902948-0-8https://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-18552082/2250textconstructed wetlandseutrophicationbiodiversitynitrogenphosphorusAgricultural and Veterinary sciencesAgricultural Science, Forestry and FisheriesLandscape ArchitectureLantbruksvetenskap och veterinärmedicinLantbruksvetenskap, skogsbruk och fiskeLandskapsarkitekturNATURAL SCIENCESNATURVETENSKAPThe results of this evaluation show that constructed wetlands in the agricultural landscape are capable of a substantial reduction of the nutrient transport to downstream recipients, but only if properly located. These wetlands will also contribute to an increased biodiversity even if not planned primarily for this purpose. The use of wetlands for multiple functions needs to be developed to motivate large-scale wetland construction.Multifunctions of wetland systems6061Maurizio Borin and Sara BacelleInternational Conference on Multi Functions of Wetland Systems : Legnaro, Italy, 26-29 June 2007.https://hh.diva-portal.org/smash/get/diva2:239073/FULLTEXT01.pdfimporthh2008-09-092021-05-11diva2:239073

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