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Thin-layer fine-sand capping of polluted sediments decreases nutrients in overlying water of Wuhan Donghu Lake in China
Jiao, Yang1; Xu, Lei1,2; Li, Qingman1; Gu, Sen1,3
2019-12-27
Source PublicationENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
ISSN0944-1344
Issue1Pages:10
Abstract

Capping water body sediments with a thin layer of sand is an effective technique to decrease nutrient concentrations in the water column and accelerate ecological restoration of eutrophic water bodies. However, long-term effects of thin-layer sand capping in shallow lakes are reported less often. Using clean fine sand and geotextile mats as capping materials for sediments collected from Wuhan Donghu Lake in China, we designed a 290-day tank experiment with 3 cm of sand capping at four percentages of sediment coverage from 25 to 100% and a control (no capping). We monitored total nitrogen (TN), total phosphorus (TP), nitrate (NO3-), ammonia (NH4+), and soluble reactive phosphorus (SRP) in the overlying water every 7 days. Mean TN and NO3- concentrations were significantly the lowest (P < 0.05) at 50% coverage. Further increase in coverage kept them slightly fluctuating. NH4+ concentration was significantly lowest (P < 0.05) at 75% coverage. The relation between coverage and mean TP and SRP concentrations indicated that 75% coverage significantly decreased (P < 0.05) them, and increasing coverage to 100% decreased them even more. The fluxes of TN and TP estimated between sediments and overlying water showed that the thin fine-sand layer significantly increased the function of sediments as a sink of TN from overlying water and the potential of a sand layer to block release of TP from sediments (P < 0.05). Our results suggested that if thin-layer sand capping were applied to Wuhan Donghu Lake, more than 50% coverage is required to decrease nutrients in the lake's water.

KeywordSediments Wuhan Donghu Lake Nutrients Thin-layer sand capping Water quality
DOI10.1007/s11356-019-07297-y
Indexed BySCI
Language英语
WOS Research AreaEnvironmental Sciences & Ecology
WOS SubjectEnvironmental Sciences
WOS IDWOS:000504467200007
WOS KeywordCALCIUM-RICH ATTAPULGITE ; IN-SITU ; PHOSPHORUS RELEASE ; ACTIVATED CARBON ; CONTAMINATED SEDIMENTS ; FLUXES ; REMEDIATION ; SORPTION ; BARRIER ; CAP
PublisherSPRINGER HEIDELBERG
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ihb.ac.cn/handle/342005/35529
Collection水环境工程研究中心_期刊论文
Corresponding AuthorLi, Qingman
Affiliation1.Chinese Acad Sci, Inst Hydrobiol, Key Lab Algal Biol, 7 Donghu South Rd, Wuhan 430072, Hubei, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100039, Peoples R China
3.Univ Rennes, Geosci UMR 6118, OSUR, CNRS, F-35000 Rennes, France
Recommended Citation
GB/T 7714
Jiao, Yang,Xu, Lei,Li, Qingman,et al. Thin-layer fine-sand capping of polluted sediments decreases nutrients in overlying water of Wuhan Donghu Lake in China[J]. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH,2019(1):10.
APA Jiao, Yang,Xu, Lei,Li, Qingman,&Gu, Sen.(2019).Thin-layer fine-sand capping of polluted sediments decreases nutrients in overlying water of Wuhan Donghu Lake in China.ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH(1),10.
MLA Jiao, Yang,et al."Thin-layer fine-sand capping of polluted sediments decreases nutrients in overlying water of Wuhan Donghu Lake in China".ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH .1(2019):10.
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