title: [Modeling nitrogen transformation in a novel circular-flow corridor wetland].
abstract: Nitrogen transformation and removal in a novel circular-flow corridor (CFC) wetland was simulated. A computer model covering 6 nitrogen forms, 3 media and 10 transferring pathways, was developed. The results show that the TN removal is attributed to zeolite adsorption (53.3%), plants NH4(+) -N uptake (27.6%), denitrification (10.2%), plants NO3(-) -N uptake (2.9%) and short-cut denitrification (1.5%). The major removal pathway for NH4(+) -N varies from season to season. In January, the zeolite adsorption played the most important role in NH4(+) -N removal with a contribution of 84.5%. From April to June, the plants uptake accounted for 76.4%-85.3% NH4(+) -N removal. While in July, there were three removal pathways, namely zeolite absorption (36.1%), nirtosation (45.8%) and plants uptake (21.4%), playing an important role in nitrogen removals. Additionally, regular plants harvesting, periodical zeolite regenerating and aquatic plants growing can improve the TN removal rate by 1.7%-7.7%, 43.1%-72.2% and 19.8%-36.2%, respectively. In short, it is by the diverse removal pathways in CFC wetland that nitrogen can be continuously removed.
authors.forename: Jian-Feng
authors.initials: JF
authors.lastname: Peng
authors.forename: Yong-Hui
authors.initials: YH
authors.lastname: Song
authors.forename: Peng
authors.initials: P
authors.lastname: Yuan
authors.forename: Xue-Yan
authors.initials: XY
authors.lastname: Zhang
authors.forename: Xiao-Ming
authors.initials: XM
authors.lastname: Hu
mesh_terms: D000327:Adsorption; D058440:Denitrification; D009584:Nitrogen / Q000737:chemistry*; D058458:Nitrogen Cycle; D010944:Plants / Q000378:metabolism; D053833:Wetlands; D017641:Zeolites / Q000737:chemistry
chemical_list: D017641:Zeolites; D009584:Nitrogen