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Contamination and ecological risk assessment of toxic trace elements in the Xi River, an urban river of Shenyang city, China

机译：沉阳市区河西江中有毒微量元素的污染及生态风险评估

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摘要

The objectives of this study were to assess the enrichment, contamination, and ecological risk posed by toxic trace elements in the sediments of the Xi River in the industrialized city of Shenyang, China. Surface sediment and sediment core were collected; analyzed for toxic trace elements; and assessed with an index of geoaccumulation (Igeo), enrichment factor (EF) value, potential ecological risk factor (Er), ecological risk index (RI), and probable effect concentration quotient (PECQ). Elemental concentrations (milligram per kilogram) were 8.5-637.9 for As, 6.5-103.9 for Cd, 12.2-21.9 for Co, 90.6-516.0 for Cr, 258.1-1,791.5 for Cu, 2.6-19.0 for Hg, 70.5-174.5 for Ni, 126.9-1,405.8 for Pb, 3.7-260.0 for Sb, 38.4-100.4 for V, and 503^,929 for Zn. The Igeo, EF, Er, and PECQ indices showed that the contamination of Cd and Hg was more serious than that of As, Cr, Cu, Ni, Pb, Sb, and Zn, whereas the presence of Co and V might be primarily from natural sources. The Igeo index for Cr and Ni might underestimate the degree of contamination, potentially as a result of high concentrations of these elements in the shale. The RI index was higher than 600, indicating a notably high ecological risk of sediment for the river. The average PECQ for As, Cd, Cr, Cu, Hg, Ni, Pb, and Zn ranged from 1.4 to 4.1 for surface sediment and from 5.2 to 9.6 in the sediment cores, indicating a high potential for an adverse biological effect. It was concluded that the sediment in the Xi River was severely contaminated and should be remediated as a hazardous material.
机译：这项研究的目的是评估沉阳工业化城市西江沉积物中有毒微量元素的富集，污染和生态风险。收集表层沉积物和沉积物芯；分析有毒的微量元素；并以地积累指数（Igeo），富集因子（EF）值，潜在生态风险因子（Er），生态风险指数（RI）和可能的影响浓度商（PECQ）进行评估。元素浓度（毫克/千克）砷为8.5-637.9，镉为6.5-103.9，钴为12.2-21.9，铬为90.6-516.0，铜为258.1-1,791.5，汞为2.6-19.0，镍为70.5-174.5，铅为126.9-1,405.8，锑为3.7-260.0，钒为38.4-100.4，锌为503 ^ 929。 Igeo，EF，Er和PECQ指数表明，Cd和Hg的污染比As，Cr，Cu，Ni，Pb，Sb和Zn的污染更为严重，而Co和V的存在可能主要来自自然资源。 Cr和Ni的Igeo指数可能低估了污染程度，这可能是由于这些元素在页岩中的浓度很高。 RI指数高于600，表明该河流的沉积物生态风险特别高。 As，Cd，Cr，Cu，Hg，Ni，Pb和Zn的平均PECQ在表层沉积物中为1.4-4.1，在沉积物核心中为5.2-9.6，表明潜在的不良生物效应。结论是Xi河的沉积物被严重污染，应作为有害物质进行补救。

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  • 来源
    《Environmental Monitoring and Assessment》 |2013年第5期|4321-4332|共12页
  • 作者

    Chunye Lin; Mengchang He; Xitao Liu; Wei Guo; Shaoqing Liu;

  • 作者单位

    State Key Joint Laboratory of Environmental Simulation and Pollution Control, School of Environment, Beijing Normal University,Beijing 100875, China;

    State Key Joint Laboratory of Environmental Simulation and Pollution Control, School of Environment, Beijing Normal University,Beijing 100875, China;

    State Key Joint Laboratory of Environmental Simulation and Pollution Control, School of Environment, Beijing Normal University,Beijing 100875, China;

    State Key Joint Laboratory of Environmental Simulation and Pollution Control, School of Environment, Beijing Normal University,Beijing 100875, China;

    State Key Joint Laboratory of Environmental Simulation and Pollution Control, School of Environment, Beijing Normal University,Beijing 100875, China;

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

    heavy metal; urban river; sediment; contamination; ecological risk;

    机译：重金属;城市河沉淀;污染;生态风险;

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