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Heavy Metal Pollution, Fractionation, and Potential Ecological Risks in Sediments from Lake Chaohu (Eastern China) and the Surrounding Rivers

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  • Lei Zhang

    (State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China)

  • Qianjiahua Liao

    (Department of Environmental Science, China Pharmaceutical University, Nanjing 211198, China)

  • Shiguang Shao

    (College of Hydrology and Water Resource, Hohai University, Nanjing 210098, China)

  • Nan Zhang

    (Department of Environmental Science, China Pharmaceutical University, Nanjing 211198, China)

  • Qiushi Shen

    (State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China)

  • Cheng Liu

    (State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China)

Abstract

Heavy metal (Cr, Ni, Cu, Zn, Cd, and Pb) pollution, fractionation, and ecological risks in the sediments of Lake Chaohu (Eastern China), its eleven inflowing rivers and its only outflowing river were studied. An improved BCR (proposed by the European Community Bureau of Reference) sequential extraction procedure was applied to fractionate heavy metals within sediments, a geoaccumulation index was used to assess the extent of heavy metal pollution, and a risk assessment code was applied to evaluate potential ecological risks. Heavy metals in the Shuangqiao and Nanfei Rivers were generally higher than the other studied sites. Of the three Lake Chaohu sites, the highest concentrations were identified in western Chaohu. Heavy metal pollution and ecological risks in the lake’s only outflowing river were similar to those in the eastern region of the lake, to which the river is connected. Heavy metal concentrations occurred in the following order: Cd > Zn > Cu > Pb ≈ Ni ≈ Cr. Cr, Ni, and Cu made up the largest proportion of the residual fraction, while Cd was the most prominent metal in the exchangeable and carbonate-included fraction. Cd posed the greatest potential ecological risk; the heavy metals generally posed risks in the following order: Cd > Zn > Cu > Ni > Pb > Cr.

Suggested Citation

  • Lei Zhang & Qianjiahua Liao & Shiguang Shao & Nan Zhang & Qiushi Shen & Cheng Liu, 2015. "Heavy Metal Pollution, Fractionation, and Potential Ecological Risks in Sediments from Lake Chaohu (Eastern China) and the Surrounding Rivers," IJERPH, MDPI, vol. 12(11), pages 1-17, November.
    • Handle: RePEc:gam:jijerp:v:12:y:2015:i:11:p:14115-14131:d:58386
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    References listed on IDEAS

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    1. Haiao Zeng & Jinglu Wu, 2013. "Heavy Metal Pollution of Lakes along the Mid-Lower Reaches of the Yangtze River in China: Intensity, Sources and Spatial Patterns," IJERPH, MDPI, vol. 10(3), pages 1-15, February.
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    Cited by:

    1. Xu Pan & Jing Ye & Hui Zhang & Jun Tang & Dandan Pan, 2019. "Occurrence, Removal and Bioaccumulation of Perfluoroalkyl Substances in Lake Chaohu, China," IJERPH, MDPI, vol. 16(10), pages 1-14, May.
    2. Nan Rong & Baoqing Shan & Chao Wang, 2016. "Determination of Sediment Oxygen Demand in the Ziya River Watershed, China: Based on Laboratory Core Incubation and Microelectrode Measurements," IJERPH, MDPI, vol. 13(2), pages 1-15, February.
    3. Fei Li & Minsi Xiao & Jingdong Zhang & Chaoyang Liu & Zhenzhen Qiu & Ying Cai, 2018. "Spatial Distribution, Chemical Fraction and Fuzzy Comprehensive Risk Assessment of Heavy Metals in Surface Sediments from the Honghu Lake, China," IJERPH, MDPI, vol. 15(2), pages 1-17, January.
    4. Kainan Nian & Wenli Xiong & Yalu Tao & Ziqing Zhu & Xiaoxue Pan & Kang Zhang & Xuesheng Zhang, 2022. "An Insight into the Sorption Behavior of 2,3,7,8-Tetrachlorodibenzothiophene on the Sediments and Paddy Soil from Chaohu Lake Basin," IJERPH, MDPI, vol. 19(18), pages 1-15, September.
    5. Qibiao Yu & Fang Wang & Weijin Yan & Fengsong Zhang & Shucong Lv & Yanqiang Li, 2018. "Carbon and Nitrogen Burial and Response to Climate Change and Anthropogenic Disturbance in Chaohu Lake, China," IJERPH, MDPI, vol. 15(12), pages 1-18, December.
    6. Zheng Sun & Jiajun Chen, 2018. "Risk Assessment of Potentially Toxic Elements (PTEs) Pollution at a Rural Industrial Wasteland in an Abandoned Metallurgy Factory in North China," IJERPH, MDPI, vol. 15(1), pages 1-16, January.

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