title: Chemical treatment of contaminated sediment for phosphorus control and subsequent effects on ammonia-oxidizing and ammonia-denitrifying microorganisms and on submerged macrophyte revegetation.
abstract: In this work, sediments were treated with calcium nitrate, aluminum sulfate, ferric sulfate, and Phoslock®, respectively. The impact of treatments on internal phosphorus release, the abundance of nitrogen cycle-related functional genes, and the growth of submerged macrophytes were investigated. All treatments reduced total phosphorus (TP) and soluble reactive phosphorus (SRP) in interstitial water, and aluminum sulfate was most efficient. Aluminum sulfate also decreased TP and SRP in overlying water. Treatments significantly changed P speciations in the sediment. Phoslock® transformed other P species into calcium-bound P. Calcium nitrate, ferric sulfate, and Phoslock® had negative influence on ammonia oxidizers, while four chemicals had positive influence on denitrifies, indicating that chemical treatment could inhibit nitrification but enhance denitrification. Aluminum sulfate had decreased chlorophyll content of the leaves of submerged macrophytes, while ferric sulfate and Phoslock® treatment would inhibit the growth of the root. Based on the results that we obtained, we emphasized that before application of chemical treatment, the effects on submerged macrophyte revegetation should be taken into consideration.
authors.affiliation: State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Donghu South Road #7, Wuhan, 430072, People's Republic of China.|University of the Chinese Academy of Sciences, Beijing, 100039, People's Republic of China.
authors.forename: Juan
authors.initials: J
authors.lastname: Lin
authors.affiliation: Hangzhou Urban River Supervision Centre, Hangzhou, 310008, People's Republic of China.
authors.forename: Yufang
authors.initials: Y
authors.lastname: Zhong
authors.affiliation: Hangzhou Urban River Supervision Centre, Hangzhou, 310008, People's Republic of China.
authors.forename: Hua
authors.initials: H
authors.lastname: Fan
authors.affiliation: State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Donghu South Road #7, Wuhan, 430072, People's Republic of China.|University of the Chinese Academy of Sciences, Beijing, 100039, People's Republic of China.
authors.forename: Chaofeng
authors.initials: C
authors.lastname: Song
authors.affiliation: Hangzhou Urban River Supervision Centre, Hangzhou, 310008, People's Republic of China.
authors.forename: Chao
authors.initials: C
authors.lastname: Yu
authors.affiliation: Hangzhou Urban River Supervision Centre, Hangzhou, 310008, People's Republic of China.
authors.forename: Yue
authors.initials: Y
authors.lastname: Gao
authors.affiliation: State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Donghu South Road #7, Wuhan, 430072, People's Republic of China. xxiong@ihb.ac.cn.
authors.forename: Xiong
authors.identifier: http://orcid.org/0000-0002-4390-1592
authors.initials: X
authors.lastname: Xiong
authors.affiliation: State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Donghu South Road #7, Wuhan, 430072, People's Republic of China.
authors.forename: Chenxi
authors.initials: C
authors.lastname: Wu
authors.affiliation: State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Donghu South Road #7, Wuhan, 430072, People's Republic of China.
authors.forename: Jiantong
authors.initials: J
authors.lastname: Liu
mesh_terms: D000641:Ammonia / Q000032:analysis* / Q000737:chemistry; D003247:Conservation of Natural Resources / Q000379:methods*; D058440:Denitrification; D017753:Ecosystem; D005618:Fresh Water / Q000737:chemistry / Q000382:microbiology; D019015:Geologic Sediments / Q000737:chemistry* / Q000382:microbiology; D031321:Hydrocharitaceae / Q000254:growth & development*; D059013:Microbial Consortia; D058465:Nitrification; D010084:Oxidation-Reduction; D010758:Phosphorus / Q000032:analysis* / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D014874:Water Pollutants, Chemical; D010758:Phosphorus; D000641:Ammonia
keywords: Chemical treatment; Denitrification; Eutrophication; Internal phosphorus; Nitrification; Submerged macrophytes