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dc.contributor.authorGao, Yan
dc.contributor.authorYi, Neng
dc.contributor.authorWang, Yan
dc.contributor.authorMa, Tao
dc.contributor.authorZhou, Qing
dc.contributor.authorZhang, Zhenhua
dc.contributor.authorYan, Shaohua
dc.date.accessioned2018-07-27T00:59:57Z
dc.date.available2018-07-27T00:59:57Z
dc.date.issued2014
dc.identifier.issn0925-8574
dc.identifier.doi10.1016/j.ecoleng.2014.01.002
dc.identifier.urihttp://hdl.handle.net/10072/173856
dc.description.abstractThe floating aquatic macrophyte may stimulate the gaseous nitrogen production via denitrificaiton in eutrophic water. In order to justify this hypothesis, an improved floating-chamber method was deployed to directly measure the productions of N2 and N2O from the eutrophic water with or without growth of Eichhornia crassipes. The abundance of denitrifiers attached to E. crassipes root surface and in the water was measured. The interactions between E. crassipes and sediment on mediating N2 production in eutrophic water were also analyzed. Within the experimental duration of 12 days, the values of N-15 at.% excess of N2-N were significantly (p < 0.05) higher with the growth of E. crassipes than that without. Regardless of added sediment or not, the total removal amounts of N2 and N2O from the water were significantly (p < 0.05) higher in the planted treatments (4.9–6.7 g N m−3 without added sediment; 9.8–12.4 g N m−3 with added sediment) than non-planted treatments (2.9–3.4 g N m−3 without added sediment; 3.6–6.0 g N m−3 with added sediment). The total removal rates of N2 and N2O from the water were significantly (p < 0.05) higher in the planted treatments (63–71% without added sediment; 161–179% with added sediment) than non-planted treatments (41–44% without added sediment; 79–81% with added sediment). Regardless of plant presence or absence, the total removal amounts and rates of N2 and N2O from the water were significantly (p < 0.05) higher in the treatments with added sediment than without. The positive interactions (p < 0.01) between E. crassipes and sediment on promoting N2 production from the water were observed. The presence of E. crassipes significantly promoted the abundances of nosZ (p < 0.05), nirK (p < 0.01) and nirS gene (p < 0.01) in the water. The results indicated that cultivation of E. crassipes could have a stimulating effect on the gaseous production of N2 by denitrification in the eutrophic water.
dc.description.peerreviewedYes
dc.languageEnglish
dc.language.isoeng
dc.publisherElsevier
dc.relation.ispartofpagefrom14
dc.relation.ispartofpageto24
dc.relation.ispartofjournalEcological Engineering
dc.relation.ispartofvolume68
dc.subject.fieldofresearchEnvironmental Science and Management not elsewhere classified
dc.subject.fieldofresearchEarth Sciences
dc.subject.fieldofresearchEnvironmental Sciences
dc.subject.fieldofresearchEngineering
dc.subject.fieldofresearchcode050299
dc.subject.fieldofresearchcode04
dc.subject.fieldofresearchcode05
dc.subject.fieldofresearchcode09
dc.titleEffect of Eichhornia crassipes on production of N2 by denitrification in eutrophic water
dc.typeJournal article
dc.type.descriptionC1 - Articles
dc.type.codeC - Journal Articles
gro.hasfulltextNo Full Text
gro.griffith.authorGao, Yan


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