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阳澄湖表层沉积物中氮磷及重金属的空间分布特征及污染评价

蒋豫 吴召仕 赵中华 王晓龙 刘新 郦倩玉 蔡永久

蒋豫, 吴召仕, 赵中华, 王晓龙, 刘新, 郦倩玉, 蔡永久. 阳澄湖表层沉积物中氮磷及重金属的空间分布特征及污染评价[J]. 环境科学研究, 2016, 29(11): 1590-1599.
引用本文: 蒋豫, 吴召仕, 赵中华, 王晓龙, 刘新, 郦倩玉, 蔡永久. 阳澄湖表层沉积物中氮磷及重金属的空间分布特征及污染评价[J]. 环境科学研究, 2016, 29(11): 1590-1599.
JIANG Yu, WU Zhaoshi, ZHAO Zhonghua, WANG Xiaolong, LIU Xin, LI Qianyu, CAI Yongjiu. Spatial Distribution and Pollution Assessment of Nitrogen,Phosphorus and Heavy Metals in Surface Sediments of Lake Yangcheng, Jiangsu Province, China[J]. Research of Environmental Sciences, 2016, 29(11): 1590-1599.
Citation: JIANG Yu, WU Zhaoshi, ZHAO Zhonghua, WANG Xiaolong, LIU Xin, LI Qianyu, CAI Yongjiu. Spatial Distribution and Pollution Assessment of Nitrogen,Phosphorus and Heavy Metals in Surface Sediments of Lake Yangcheng, Jiangsu Province, China[J]. Research of Environmental Sciences, 2016, 29(11): 1590-1599.

阳澄湖表层沉积物中氮磷及重金属的空间分布特征及污染评价

基金项目: 国家水体污染控制与治理科技重大专项(2014ZX07101-011);科技部基础性工作专项(2013FY111800);江苏省自然科学基金项目(BK20131055)

Spatial Distribution and Pollution Assessment of Nitrogen,Phosphorus and Heavy Metals in Surface Sediments of Lake Yangcheng, Jiangsu Province, China

  • 摘要: 为了解阳澄湖表层沉积物中氮磷及重金属的空间分布和污染特征,对全湖开展了大范围调查,基于综合污染指数、地积累指数法和潜在生态风险指数法对沉积物污染风险进行评价.结果表明:阳澄湖表层沉积物中w(TN)、w(TP)平均值分别为3 433、379 mg/kg,湖区氮磷污染严重且空间差异明显,w(TN)高值区位于阳澄东湖,w(TP)高值区位于阳澄西湖;综合污染指数评价结果显示,整个阳澄湖TN均为重度污染状态,TP除阳澄西湖外大部分区域处于轻度污染状态.阳澄湖表层沉积物中w(Cu)、w(Zn)、w(Pb)、w(Cr)、w(Cd)、w(As)、w(Hg)、w(Ni)的平均值分别为35.0、141、12.6、62.6、0.36、27.5、0.145、47.6 mg/kg,分别是江苏省土壤重金属环境背景值的1.50、2.17、0.57、0.83、4.22、2.93、5.78、1.45倍,阳澄西湖的重金属含量要高于阳澄中湖和阳澄东湖.地积累指数法和潜在生态风险指数法评价结果均表明,Hg和Cd是主要的生态风险贡献因子,二者生态风险指数平均值分别为231.23、126.63.相关分析结果表明,阳澄湖表层沉积物中Cu、Zn、Pb、Cr、Cd、Hg和Ni的质量分数显著相关,说明其具有相似的来源,结合水系结构和周边企业分布,推测其主要来自于相城区和常熟市的工业企业.

     

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  • 收稿日期:  2016-02-27
  • 修回日期:  2016-06-17
  • 刊出日期:  2016-11-25

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