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长江口东滩湿地柱状沉积物中多氯联苯的分布和变化趋势

潘 静 陈大舟 杨永亮 汤 桦 刘晓端

潘 静, 陈大舟, 杨永亮, 汤 桦, 刘晓端. 长江口东滩湿地柱状沉积物中多氯联苯的分布和变化趋势[J]. 环境科学研究, 2009, 22(11): 1282-1287.
引用本文: 潘 静, 陈大舟, 杨永亮, 汤 桦, 刘晓端. 长江口东滩湿地柱状沉积物中多氯联苯的分布和变化趋势[J]. 环境科学研究, 2009, 22(11): 1282-1287.
PAN Jing, CHEN Da-zhou, YANG Yong-liang, TANG Hua, LIU Xiao-duan. Distribution and Vertical Trends of PCBs in a Sediment Core from Dongtan Wetland, Yangtze River Estuary[J]. Research of Environmental Sciences, 2009, 22(11): 1282-1287.
Citation: PAN Jing, CHEN Da-zhou, YANG Yong-liang, TANG Hua, LIU Xiao-duan. Distribution and Vertical Trends of PCBs in a Sediment Core from Dongtan Wetland, Yangtze River Estuary[J]. Research of Environmental Sciences, 2009, 22(11): 1282-1287.

长江口东滩湿地柱状沉积物中多氯联苯的分布和变化趋势

基金项目: 国家自然科学基金项目(40773010);中国地质调查局基金项目(06-D3-81)

Distribution and Vertical Trends of PCBs in a Sediment Core from Dongtan Wetland, Yangtze River Estuary

  • 摘要: 采用同位素稀释质谱法,用高分辨率气相色谱-高分辨率质谱仪(HRGC-HRMS)对长江口崇明东滩湿地柱状沉积物30个层段中7种指示性多氯联苯(PCB28,PCB52,PCB101,PCB118,PCB153,PCB138和PCB180)的含量进行了测定. 结合近几十年长江下游气候变化情况,对PCBs垂直分布历史记录特征以及异构体的物理化学性质参数进行了探讨. 结果表明,w(PCBs)为0.138~0.400 ng/g(以干质量计,下同),平均值为0.228 ng/g,属于轻度污染. 东滩沉积物中PCBs呈现明显的周期性分布,在20世纪50年代初期开始快速增长,高峰期出现在70年代,之后呈减少趋势,反映了世界主要生产国家禁止生产PCBs的情况.

     

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出版历程
  • 收稿日期:  2009-03-18
  • 修回日期:  2009-04-16
  • 刊出日期:  2009-11-25

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