title: [Control effect of different covering patterns on indigenous nutrient release from sediment].
abstract: A laboratory simulation experiment was conducted to study the release of sediment phosphorous and nitrogen under the effects of coating the sediment with plastic, clinoptilolite, calcite, quartz sand, and calcium nitrate, aimed to provide scientific basis and technical support to control the sediment nutrient release under the background of water environment pollution by different concentrations of nitrogen and phosphorus. The control efficacy of test coating materials for sediment total phosphorous release was in the order of plastic > calcium nitrate > clinoptilolite > calcite > quartz sand, and that for sediment total nitrogen release was in the order of clinoptilolite > plastic > calcite > quartz sand > calcium nitrate. As for the release of sediment NO(3-)-N, the control efficacy of test coating materials was calcium nitrate > quartz sand > clinoptilolite > calcite > plastic coating; whereas for the release of sediment NH(4+)-N, the sequence was calcium nitrate > plastic coating > clinoptilolite > calcite > quartz sand. Water temperature had definite relativity to the sediment nutrient release. With the increase of water temperature, the concentrations of water total phosphorous and nitrogen and NO(3-)-N increased, while the concentration of water NH(4+)-N presented a declining trend.
authors.affiliation: State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process/Shanghai Key Laboratory of Functional Materials Chemistry, East China University of Science and Technology, Shanghai 200237, China. wzhang@ecust.edu.cn
authors.forename: Wei
authors.initials: W
authors.lastname: Zhang
authors.forename: Bang
authors.initials: B
authors.lastname: Xiong
authors.forename: Kuang-Fei
authors.initials: KF
authors.lastname: Lin
authors.forename: Hai-Fang
authors.initials: HF
authors.lastname: Li
authors.forename: Mei-Jin
authors.initials: MJ
authors.lastname: Guo
authors.forename: Xin-Hong
authors.initials: XH
authors.lastname: Cui
authors.forename: Bin
authors.initials: B
authors.lastname: Wang
mesh_terms: D002681:China; D019015:Geologic Sediments / Q000737:chemistry*; D009566:Nitrates / Q000032:analysis; D009584:Nitrogen / Q000032:analysis; D010758:Phosphorus / Q000032:analysis; D045483:Rivers; D014874:Water Pollutants, Chemical / Q000032:analysis*; D014876:Water Pollution / Q000517:prevention & control*
chemical_list: D009566:Nitrates; D014874:Water Pollutants, Chemical; D010758:Phosphorus; D009584:Nitrogen; C006568:ammonium nitrate