title: [Impact of sewage discharging on environmental geochemical processes of nutrients in the Yangtze estuarine and tidal flats].
abstract: Influences of sewage discharge on environmental geochemical processes of nutrients were investigated in the Yangtze estuarine and tidal flats. The result indicated that the environmental elements obviously responded to sewage discharging. There was obvious enrichment of NH4+ -N, TIN, TDP, Ads-P, Fe-P and CFAP + Ca-P in overlying water, surface sediments and its pore waters adjacent to sewage outlets in the Yangtze Estuary. The enrichment of nutrients N and P was considered to be related not only to the inputs of nutrients from sewage outlets, but also to the changes of environmental factors induced by sewage discharge. On the contrary, there was no significant enrichment of NO(x)(-) -N in the tidal water, pore waters and surface sediments from the Yangtze Estuary, which showed that external inputs of nutrients was not the primary factor controlling the distributions of NO(x)(-) -N. It was also shown that the diffusive fluxes of nutrients N and P across sediment-water interface was markedly higher at sewage outlets than the control sampling sites in tidal flats, indicating that sewage discharge not only increased the accumulation of nutrients N and P in the tidal flats, but also strengthened the exchange processed of nutrients across tidal sediment-water interface.
authors.affiliation: Key Laboratory of Geo-information Science of the Ministry of Education, Department of Geography, East China Normal University, Shanghai 200062, China. szszfjm@sina.com
authors.forename: Jin-Mu
authors.initials: JM
authors.lastname: Fu
authors.forename: Min
authors.initials: M
authors.lastname: Liu
authors.forename: Li-Jun
authors.initials: LJ
authors.lastname: Hou
authors.forename: Dong-Nij
authors.initials: DN
authors.lastname: Ou
authors.forename: Qiao-Mei
authors.initials: QM
authors.lastname: Liu
mesh_terms: D002681:China; D004784:Environmental Monitoring; D005068:Eutrophication; D005618:Fresh Water / Q000032:analysis* / Q000382:microbiology; D019015:Geologic Sediments / Q000737:chemistry* / Q000382:microbiology; D045483:Rivers; D012722:Sewage; D014874:Water Pollutants, Chemical / Q000378:metabolism*
chemical_list: D012722:Sewage; D014874:Water Pollutants, Chemical