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Geochemical baselines of heavy metals in the sediments of two large freshwater lakes in China: implications for contamination character and history

机译:中国两个大型淡水湖沉积物中重金属的地球化学基线:对污染特征和历史的影响

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摘要

The aim of this study was to estimate the geochemical baseline concentrations of various heavy metals in the surface sediments of two large freshwater lakes in Taihu and Dianchi, China, and to assess the character and history of heavy metal contamination around the two lakes. Heavy metal concentrations in the sediments were obtained by field surveys and were supplemented with published data. The statistical methods of cumulative frequency and normalization were employed to obtain the baselines. The respective baseline concentrations for As, Sb, Hg, Co, Cr, Cu, Ni, Pb and Zn were 9.92, 1.67, 0.14, 22.62, 100.56, 31.63, 31.97, 33.05 and 97.01 mg/kg, respectively, in Taihu, and 24.60, 4.29, 0.25, 36.78, 135.68, 90.05, 50.76, 73.56 and 208.76 mg/kg, respectively, in Dianchi. The baseline concentrations of these heavy metals in Lake Taihu were equivalent to the pre-industrial concentrations determined from lakes in Sweden and Europe. Conversely, those in Lake Dianchi were much higher than the pre-industrial values. Li, Fe, Sc, Ti, V and Al were found to be the suitable reference elements for normalization, and one of these elements could be used to predict the baseline concentrations of heavy metals except Hg. Most of the heavy metals had one inflexion, and only Cu and Pb in Taihu, Sb, Pb and Zn in Dianchi, were found to have two inflexions in the cumulative curves, suggesting remarkable anthropogenic inputs of Cu and Pb in Taihu, Sb, Pb and Zn in Dianchi, which are generally consistent with the respective industrial structure around Taihu and Dianchi.
机译:这项研究的目的是估算中国太湖和滇池两个大型淡水湖表面沉积物中各种重金属的地球化学基线浓度,并评估这两个湖周围重金属的污染特征和历史。通过实地调查获得了沉积物中重金属的浓度,并补充了已发表的数据。采用累积频率和归一化的统计方法获得基线。太湖地区的砷,锑,汞,钴,铬,铜,镍,铅和锌的基线浓度分别为9.92、1.67、0.14、22.62、100.56、31.63、31.97、33.05和97.01 mg / kg。在滇池分别为24.60、4.29、0.25、36.78、135.68、90.05、50.76、73.56和208.76 mg / kg。太湖中这些重金属的基线浓度等于从瑞典和欧洲的湖泊测得的工业化前浓度。相反,滇池的水含量远高于工业化前的水平。发现Li,Fe,Sc,Ti,V和Al是进行标准化的合适参考元素,这些元素之一可用于预测除Hg之外的重金属的基线浓度。大多数重金属具有一个拐点,仅太湖的铜和铅,滇池的铅,铅和锌在累积曲线中有两个拐点,表明太湖的铜和铅的人为输入量,铅,铅滇池中的锌和锌,与太湖和滇池周围的产业结构基本一致。

著录项

  • 来源
    《Environmental Geochemistry and Health》 |2012年第6期|p.737-748|共12页
  • 作者

    Chaoyang Wei; Hailong Wen;

  • 作者单位

    Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, 11A Datun Road, Anwai, Chaoyang District, Beijing 100101, China;

    Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, 11A Datun Road, Anwai, Chaoyang District, Beijing 100101, China,School of Environmental and Chemical Engineering, Nanchang University, Nanchang 330031, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    contamination; dianchi; normalization; cumulative frequency; taihu;

    机译:污染;滇池正常化;累积频率;太湖;
  • 入库时间 2022-08-17 13:27:48

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