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题名: Effectiveness and Mode of Action of Calcium Nitrate and Phoslock (R) in Phosphorus Control in Contaminated Sediment, a Microcosm Study
作者: Lin, Juan1, 4; Qiu, Peihuang2; Yan, Xiangjun2; Xiong, Xiong1; Jing, Liandong3; Wu, Chenxi1
关键词: Internal loading ; Sediment ; Phosphorus fractionation ; Nitrogen cycle
刊名: WATER AIR AND SOIL POLLUTION
发表日期: 2015-10-01
DOI: 10.1007/s11270-015-2590-4
卷: 226, 期:10
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ; Life Sciences & Biomedicine ; Physical Sciences
类目[WOS]: Environmental Sciences ; Meteorology & Atmospheric Sciences ; Water Resources
研究领域[WOS]: Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences ; Water Resources
英文摘要: Calcium nitrate and a lanthanum-modified bentonite (Phoslock(R)) were investigated for their ability to control the release of phosphorus from contaminated sediment. Their effectiveness and mode of action were assessed using microcosm experiments by monitoring the variation of physiochemical parameters and phosphorus and nitrogen species over time following the treatment for 66 days. Phoslock(R) was more effective reducing phosphorus in overlaying water and controlling its release from sediment. Calcium nitrate improved redox condition at the sediment-water interface and temporally reduce phosphorus in overlaying water but phosphorus level returned back in a long run. Phosphorus fractionation suggested that Phoslock(R) converted mobile phosphorus to more stable species while calcium nitrate increased the fractions of mobile phosphorus species. Phoslock(R) generally showed no effect on nitrogen species. Whereas calcium nitrate temporally increased nitrate, nitrite, and ammonium concentrations but their concentrations quickly reduced likely due to the denitrification process. Results suggested that Phoslock(R) can be more effective in controlling the release of phosphorus from sediment than calcium nitrate. However, calcium nitrate can improve the redox condition at the sediment-water interface, which may provide other benefits such as stimulating biodegradation.
关键词[WOS]: SHALLOW LAKE ; EUTROPHIC LAKE ; BINDING CLAY ; RELEASE ; WATER ; RESTORATION ; ALUMINUM ; IRON ; FRACTIONATION ; REMEDIATION
语种: 英语
WOS记录号: WOS:000361764400009
ISSN号: 0049-6979
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.ihb.ac.cn/handle/342005/27212
Appears in Collections:水环境工程研究中心_期刊论文

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作者单位: 1.Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Wuhan 430072, Peoples R China
2.Hangzhou Urban River Supervis Ctr, Hangzhou 310008, Zhejiang, Peoples R China
3.Southwest Univ Nationalities, Coll Chem & Environm Protect Engn, Chengdu 610041, Peoples R China
4.Chinese Acad Sci, Grad Univ, Beijing 100039, Peoples R China
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