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Lead pollution recorded in sediments of three lakes located at the middle and lower Yangtze River basin, China

机译：长江中下游三个湖泊沉积物中的铅污染记录

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摘要

Sedimentary cores were collected from Honghu Lake, Guchenghu Lake, Taihu Lake during 2002-2005. The total organic carbon (TOC) and metals (Pb, Al, Fe, and Ti) were analyzed. Combined with ~(137)Cs or ~(210)Pb dating method, average sedimentation rates were calculated to be 0.15 cm/a at Honghu core, 0.067 cm/a at Guchenghu core and 0.35-0.41 cm/a at Taihu core. Regression model between lead and geogenic tracer elements and TOC was established. The relationship between lead and geogenic tracer elements or TOC was significant. Pb contamination was estimated based on the natural contribution using regression model. The results indicated anthropogenic lead in the three lakes. The onset of lead pollution was estimated to be early 1970s based on sedimentations from ~(137)Cs or ~(210)Pb dating method. It means the possibility of using lead as time marker. According to the sediment quality guideline (SQG), the sediment was unpolluted except the surface sediment at Honghu and Guchenghu Lake cores. The lead concentrations of Taihu Lake core were higher than that from the other two lakes, but still lower than heavily polluted level. However, anthropogenic lead load to Guchenghu and Honghu increased which should cause the attention of scientist and lake managers.
机译：2002-2005年分别从洪湖，古城湖，太湖收集沉积岩心。分析了总有机碳（TOC）和金属（铅，铝，铁和钛）。结合〜（137）Cs或〜（210）Pb测年方法，计算得出洪湖核心平均沉积速率为0.15 cm / a，古城湖核心为0.067 cm / a，太湖核心为0.35-0.41 cm / a。建立了铅与地质示踪元素之间的回归模型和TOC。铅与地质示踪元素或TOC之间的关系很重要。使用回归模型根据自然贡献估算铅污染。结果表明在三个湖中有人为的铅。根据〜（137）Cs或〜（210）Pb测年法的沉积，估计铅污染的发生时间为1970年代初。这意味着可以使用铅作为时间标记。根据沉积物质量指南（SQG），除洪湖和古城湖核心地表沉积物外，沉积物未被污染。太湖湖心的铅含量高于其他两个湖，但仍低于重度污染水平。然而，古城湖和洪湖的人为铅负荷增加，这应引起科学家和湖泊管理者的注意。

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  • 来源
    《Quaternary International》 |2009年第2009期|145-150|共6页
  • 作者

    Yao Shuchun; Xue Bin; Xia Weilan; Zhu Yuxing; Li Shijie;

  • 作者单位

    State Key Lab of Lake Science and Environment, Nanjing Institute of Geography & Limnology, Chinese Academy of Sciences, 73 East Beijing Road, Nanjing 210008, PR China;

    State Key Lab of Lake Science and Environment, Nanjing Institute of Geography & Limnology, Chinese Academy of Sciences, 73 East Beijing Road, Nanjing 210008, PR China;

    State Key Lab of Lake Science and Environment, Nanjing Institute of Geography & Limnology, Chinese Academy of Sciences, 73 East Beijing Road, Nanjing 210008, PR China;

    State Key Lab of Lake Science and Environment, Nanjing Institute of Geography & Limnology, Chinese Academy of Sciences, 73 East Beijing Road, Nanjing 210008, PR China;

    State Key Lab of Lake Science and Environment, Nanjing Institute of Geography & Limnology, Chinese Academy of Sciences, 73 East Beijing Road, Nanjing 210008, PR China;

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