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东洞庭湖沉积物中重金属的分布特征、污染评价与来源辨析

万 群 李 飞 祝慧娜 汪 铁 梁 婕 黄瑾辉 谢更新

万 群, 李 飞, 祝慧娜, 汪 铁, 梁 婕, 黄瑾辉, 谢更新. 东洞庭湖沉积物中重金属的分布特征、污染评价与来源辨析[J]. 环境科学研究, 2011, 24(12): 1378-1384.
引用本文: 万 群, 李 飞, 祝慧娜, 汪 铁, 梁 婕, 黄瑾辉, 谢更新. 东洞庭湖沉积物中重金属的分布特征、污染评价与来源辨析[J]. 环境科学研究, 2011, 24(12): 1378-1384.
WAN Qun, LI Fei, ZHU Hui-na, WANG Tie, LIANG Jie, HUANG Jin-hui, XIE Geng-xin. Distribution Characteristics, Pollution Assessment and Source Identification of Heavy Metals in the Sediment of East Dongting Lake[J]. Research of Environmental Sciences, 2011, 24(12): 1378-1384.
Citation: WAN Qun, LI Fei, ZHU Hui-na, WANG Tie, LIANG Jie, HUANG Jin-hui, XIE Geng-xin. Distribution Characteristics, Pollution Assessment and Source Identification of Heavy Metals in the Sediment of East Dongting Lake[J]. Research of Environmental Sciences, 2011, 24(12): 1378-1384.

东洞庭湖沉积物中重金属的分布特征、污染评价与来源辨析

基金项目: 国家自然科学基金重点项目(51039001);三峡办洞庭湖湿地保护试点示范工程项目(SX2010-026);国家自然科学基金青年基金项目(51009063)

Distribution Characteristics, Pollution Assessment and Source Identification of Heavy Metals in the Sediment of East Dongting Lake

  • 摘要: 基于2008年1月对东洞庭湖6个具代表性监测断面的采样分析,通过地累积指数模型、多变量分析理论和主成分分析法,研究了东洞庭湖沉积物中重金属的污染富集分布特征及其主要来源. 结果表明,沉积物中重金属元素Cd和Hg在各采样断面的污染富集程度均较高,尤其是在樟树港、洞庭湖出口2个采样断面的污染富集程度达到重度污染水平. 相关分析表明,w(Pb),w(Hg),w(Cd)和w(Zn)之间呈显著正相关,w(Cr)与w(As)之间也呈显著正相关,其他重金属之间无显著的相关性. 通过主成分分析研究了重金属的来源,发现2个主成分的贡献率分别为52.267%和33.380%. 结合洞庭湖水系自身特点及周边点源、非点源污染情况,将东洞庭湖沉积物中的重金属划分为2类:Pb,Hg,Cd和Zn作为第一主成分,主要受人类活动中的工矿业采冶支配;第二主成分为Cr与As,与人类活动中的生活污水排放和农业生产有密切关系.

     

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出版历程
  • 收稿日期:  2011-03-04
  • 修回日期:  2011-06-24
  • 刊出日期:  2011-12-25

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