Mobility and sulfidization of heavy metals in sediments of a shallow eutrophic lake, Lake Taihu, China

Shouliang Huo; Jingtian Zhang; Kevin M. Yeager; Beidou Xi; Yanwen Qin; Zhuoshi He; Fengchang Wu

doi:10.1016/j.jes.2014.12.003

Mobility and sulfidization of heavy metals in sediments of a shallow eutrophic lake, Lake Taihu, China

Shouliang Huo, Jingtian Zhang, Kevin M. Yeager, Beidou Xi, Yanwen Qin, Zhuoshi He, Fengchang Wu

Earth and Environmental Sciences

Research output: Contribution to journal › Article › peer-review

41 Scopus citations

Abstract

The technique of DGT (diffusive gradients in thin films) using three diffusive gel thicknesses was applied to estimate the mobility and bioavailability of heavy metals in sediments and porewater of Lake Taihu, China. The DGT results showed significantly positive correlations between Co, Pb, Cd and Mn, and Ni and Fe concentrations in porewater. Cu and Zn showed a significantly negative correlation with Mn, due to Cu combination with carbonates and Zn derived from agricultural pollution, respectively. The rank order of average concentrations of Co, Ni and Cd at each station was DGT_1.92>DGT_0.78>DGT_0.39, suggesting stronger resupply from sediments to porewater when using thicker diffusive gels. Comparing centrifugation and DGT measurements, Co, Ni and Cd are highly labile; Mn and Fe are moderately labile; and Cu, Zn and Pb are slightly labile. The variations of AVS concentrations in sediment cores indicate that metal sulfides in deeper layers are easily diffused into surface sediments.

Original language	English
Pages (from-to)	1-11
Number of pages	11
Journal	Journal of Environmental Sciences
Volume	31
DOIs	https://doi.org/10.1016/j.jes.2014.12.003
State	Published - May 1 2015

Bibliographical note

Funding Information:
This study is supported by the Mega-projects of Science Research for Water Environment Improvement (No. 2012ZX07101-002 ) and the National Natural Science Foundation of China (No. 41303085 ).

Publisher Copyright:
© 2015.

Keywords

DGT (diffusive gradients in thin films)
Heavy metals
Sulfidization process

ASJC Scopus subject areas

Environmental Engineering
Environmental Chemistry
Environmental Science (all)

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10.1016/j.jes.2014.12.003

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title = "Mobility and sulfidization of heavy metals in sediments of a shallow eutrophic lake, Lake Taihu, China",

abstract = "The technique of DGT (diffusive gradients in thin films) using three diffusive gel thicknesses was applied to estimate the mobility and bioavailability of heavy metals in sediments and porewater of Lake Taihu, China. The DGT results showed significantly positive correlations between Co, Pb, Cd and Mn, and Ni and Fe concentrations in porewater. Cu and Zn showed a significantly negative correlation with Mn, due to Cu combination with carbonates and Zn derived from agricultural pollution, respectively. The rank order of average concentrations of Co, Ni and Cd at each station was DGT1.92>DGT0.78>DGT0.39, suggesting stronger resupply from sediments to porewater when using thicker diffusive gels. Comparing centrifugation and DGT measurements, Co, Ni and Cd are highly labile; Mn and Fe are moderately labile; and Cu, Zn and Pb are slightly labile. The variations of AVS concentrations in sediment cores indicate that metal sulfides in deeper layers are easily diffused into surface sediments.",

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author = "Shouliang Huo and Jingtian Zhang and Yeager, {Kevin M.} and Beidou Xi and Yanwen Qin and Zhuoshi He and Fengchang Wu",

note = "Funding Information: This study is supported by the Mega-projects of Science Research for Water Environment Improvement (No. 2012ZX07101-002 ) and the National Natural Science Foundation of China (No. 41303085 ). Publisher Copyright: {\textcopyright} 2015.",

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AU - Huo, Shouliang

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AU - Yeager, Kevin M.

AU - Xi, Beidou

AU - Qin, Yanwen

AU - He, Zhuoshi

AU - Wu, Fengchang

N1 - Funding Information: This study is supported by the Mega-projects of Science Research for Water Environment Improvement (No. 2012ZX07101-002 ) and the National Natural Science Foundation of China (No. 41303085 ). Publisher Copyright: © 2015.

PY - 2015/5/1

Y1 - 2015/5/1

N2 - The technique of DGT (diffusive gradients in thin films) using three diffusive gel thicknesses was applied to estimate the mobility and bioavailability of heavy metals in sediments and porewater of Lake Taihu, China. The DGT results showed significantly positive correlations between Co, Pb, Cd and Mn, and Ni and Fe concentrations in porewater. Cu and Zn showed a significantly negative correlation with Mn, due to Cu combination with carbonates and Zn derived from agricultural pollution, respectively. The rank order of average concentrations of Co, Ni and Cd at each station was DGT1.92>DGT0.78>DGT0.39, suggesting stronger resupply from sediments to porewater when using thicker diffusive gels. Comparing centrifugation and DGT measurements, Co, Ni and Cd are highly labile; Mn and Fe are moderately labile; and Cu, Zn and Pb are slightly labile. The variations of AVS concentrations in sediment cores indicate that metal sulfides in deeper layers are easily diffused into surface sediments.

AB - The technique of DGT (diffusive gradients in thin films) using three diffusive gel thicknesses was applied to estimate the mobility and bioavailability of heavy metals in sediments and porewater of Lake Taihu, China. The DGT results showed significantly positive correlations between Co, Pb, Cd and Mn, and Ni and Fe concentrations in porewater. Cu and Zn showed a significantly negative correlation with Mn, due to Cu combination with carbonates and Zn derived from agricultural pollution, respectively. The rank order of average concentrations of Co, Ni and Cd at each station was DGT1.92>DGT0.78>DGT0.39, suggesting stronger resupply from sediments to porewater when using thicker diffusive gels. Comparing centrifugation and DGT measurements, Co, Ni and Cd are highly labile; Mn and Fe are moderately labile; and Cu, Zn and Pb are slightly labile. The variations of AVS concentrations in sediment cores indicate that metal sulfides in deeper layers are easily diffused into surface sediments.

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KW - Sulfidization process

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Mobility and sulfidization of heavy metals in sediments of a shallow eutrophic lake, Lake Taihu, China

Abstract

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Keywords

ASJC Scopus subject areas

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