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Enhancing nitrogen ...
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Choudhury, Maidul I.Linnaeus University, Kalmar, Sweden; Vattenfall Ab, Stockholm, Sweden
(författare)
Enhancing nitrogen removal through macrophyte harvest and installation of woodchips-based floating beds in surface-flow constructed wetlands
- Artikel/kapitelEngelska2024
Förlag, utgivningsår, omfång ...
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Oxford :Elsevier,2024
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LIBRIS-ID:oai:DiVA.org:hh-53350
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https://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-53350URI
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https://doi.org/10.1016/j.chemosphere.2024.142284DOI
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Språk:engelska
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Sammanfattning på:engelska
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Ämneskategori:ref swepub-contenttype
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Ämneskategori:art swepub-publicationtype
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This study was funded by Stiftelsen Oscar och Lili Lamms Minne (grant no. FO2019-0012) to MC and SH and a grant for eutrophication prevention (\u00F6verg\u00F6dnings\u00E5rg\u00E4rder anslag 1:11) from Vattenmyndigheten V\u00E4sterhavet 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.
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Wetland 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 Authors
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Biuppslag (personer, institutioner, konferenser, titlar ...)
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Nilsson, Josefin,1994-Högskolan i Halmstad,Akademin för företagande, innovation och hållbarhet,Uppsala University, Uppsala, Sweden(Swepub:hh)joseni
(författare)
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Hylander, SamuelLinnaeus University, Kalmar, Sweden
(författare)
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Hauber, MarcLinnaeus University, Kalmar, Sweden
(författare)
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Ehde, Per Magnus,1956-Högskolan i Halmstad,Akademin för företagande, innovation och hållbarhet(Swepub:hh)pema
(författare)
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Weisner, Stefan,1954-Högskolan i Halmstad,Akademin för företagande, innovation och hållbarhet(Swepub:hh)stewe
(författare)
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Liess, Antonia,1975-Högskolan i Halmstad,Akademin för företagande, innovation och hållbarhet(Swepub:hh)antlie
(författare)
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Linnaeus University, Kalmar, Sweden; Vattenfall Ab, Stockholm, SwedenAkademin för företagande, innovation och hållbarhet
(creator_code:org_t)
Sammanhörande titlar
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Ingår i:ChemosphereOxford : Elsevier3590045-65351879-1298
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