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渤海湾表层沉积物重金属在不同粒级有机-矿质复合体中的分布

刘 俐 宋存义 熊代群 高新华 李发生

刘 俐, 宋存义, 熊代群, 高新华, 李发生. 渤海湾表层沉积物重金属在不同粒级有机-矿质复合体中的分布[J]. 环境科学研究, 2006, 19(1): 75-79.
引用本文: 刘 俐, 宋存义, 熊代群, 高新华, 李发生. 渤海湾表层沉积物重金属在不同粒级有机-矿质复合体中的分布[J]. 环境科学研究, 2006, 19(1): 75-79.
LIU Li, SONG Cun-yi, XIONG Dai-qun, GAO Xin-hua, LI Fa-sheng. Distribution of Heavy Metals in Different Fractions of Organo-Mineral Aggregates in Surficial Sediment of Bohai Bay[J]. Research of Environmental Sciences, 2006, 19(1): 75-79.
Citation: LIU Li, SONG Cun-yi, XIONG Dai-qun, GAO Xin-hua, LI Fa-sheng. Distribution of Heavy Metals in Different Fractions of Organo-Mineral Aggregates in Surficial Sediment of Bohai Bay[J]. Research of Environmental Sciences, 2006, 19(1): 75-79.

渤海湾表层沉积物重金属在不同粒级有机-矿质复合体中的分布

基金项目: 国家重点基础研究发展计划项目(2003CB415007);国家"十五"科技攻关计划项目(2003BA614A-10-02)

Distribution of Heavy Metals in Different Fractions of Organo-Mineral Aggregates in Surficial Sediment of Bohai Bay

  • 摘要: 采用超声分散法分离沉积物中不同粒级有机-矿质复合体,研究了渤海湾沉积物中Pb,Cd,Cr等重金属的污染及其在不同粒级有机-矿质复合体中的分布.结果表明,3种重金属含量总体上随着复合体粒径增大而减小.X射线衍射(XRD)结果显示,随着沉积物粒径的增大,主要来自原生矿物的石英和长石等岩石结构物质的含量增加,但这些物质中的重金属含量较低.渤海湾表层沉积物中重金属污染主要发生在以次生硅酸盐矿物及硅、铁、铝等氧化物或氢氧化物为主的细粒沉积物上,细粒样品由于其较大的比表面积和富含有机质的特性,通过吸附、沉淀、离子交换等,导致所含重金属含量较高.粘粒复合体中Pb含量是粗砂中的2.3倍,Cd是粗砂的3.8倍,而Cr是粗砂的2.8倍.

     

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出版历程
  • 收稿日期:  2005-06-09
  • 修回日期:  2006-01-30
  • 刊出日期:  2006-02-25

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