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拉萨垃圾填埋场渗滤液处理站周边土壤重金属含量分析及评价

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穷达卓玛, 汪晶, 周文武, 周鹏, 孟德安, 旦增. 拉萨垃圾填埋场渗滤液处理站周边土壤重金属含量分析及评价[J]. 环境化学, 2020, (5): 1404-1409. doi: 10.7524/j.issn.0254-6108.2019081401
引用本文: 穷达卓玛, 汪晶, 周文武, 周鹏, 孟德安, 旦增. 拉萨垃圾填埋场渗滤液处理站周边土壤重金属含量分析及评价[J]. 环境化学, 2020, (5): 1404-1409. doi: 10.7524/j.issn.0254-6108.2019081401
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QIONGDA Zhuoma, WANG Jing, ZHOU Wenwu, ZHOU Peng, MENG Dean, DAN Zeng. Analysis and evaluation of heavy metal content in soil around leachate treatment station of lhasa landfill site[J]. Environmental Chemistry, 2020, (5): 1404-1409. doi: 10.7524/j.issn.0254-6108.2019081401
Citation: QIONGDA Zhuoma, WANG Jing, ZHOU Wenwu, ZHOU Peng, MENG Dean, DAN Zeng. Analysis and evaluation of heavy metal content in soil around leachate treatment station of lhasa landfill site[J]. Environmental Chemistry, 2020, (5): 1404-1409. doi: 10.7524/j.issn.0254-6108.2019081401
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拉萨垃圾填埋场渗滤液处理站周边土壤重金属含量分析及评价

  • 1. 西藏大学理学院, 拉萨, 850000;

  • 2. 天津大学环境科学与工程学院, 天津, 300072

    • 通讯作者: 旦增, E-mail: yongzhong2008@163.com
  • 基金项目:

    国家自然科学基金（51668056），西藏大学科研培育基金之成长计划项目（ZDTSJH19-14）和西藏自治区重点科技计划（Z2016C01G01106）资助.

Analysis and evaluation of heavy metal content in soil around leachate treatment station of lhasa landfill site

  • 1. School of Science, Tibet University, Lhasa, 850000, China;

  • 2. School of Environmental Science and Engineering, Tianjin University, Tianjin, 300072, China

    • Corresponding author: DAN Zeng, yongzhong2008@163.com
  • Fund Project: Supported by National Natural Science Foundation Regional Fund Project(51668056), Growth Plan Project of Research and Cultivation Fund of Tibet University (ZDTSJH19-14)and the Key Science and Technology Program of Tibet Autonomous Region(Z2016C01G01106).

  • 摘要: 填埋是西藏城乡生活垃圾处理处置主要方式.受垃圾填埋场渗滤液的影响，垃圾填埋场周边环境污染问题越来越引起社会关注.本文于2018年3月22日对拉萨市渗滤液处理站正南50 m和西南200 m处进行土壤采样，分析土壤酸度及Cd、Hg、As、Ni、Cu、Pb、Cr、Zn等8种重金属含量水平，采用Hakanson潜在生态风险危害法对垃圾填埋场周边土壤生态风险进行分析评价.结果表明，受垃圾渗滤液的影响，垃圾渗滤液处理站周边土壤酸度降低；Cd、As和Zn等3种重金属在两个监测点的含量均高于拉萨城市土壤元素背景值和中国土壤元素背景值，其中污染贡献率最大的是Cd，分别是拉萨城市土壤背景值的6.67倍和中国城市土壤元素背景值的8.25倍；根据两个监测RI值可知，150≤RI<300为中等生态危害，其危害程度为西南200 m>正南50 m.
    Abstract: Landfill is the main way of municipal solid waste disposal in Tibet. Due to the influence of landfill leachate, the environmental pollution around landfill has attracted more and more attention. In this paper, soil samples were taken from 50m south and 200m southwest of the Lhasa Leachate Treatment Station respectively on March 22, 2018. Soil acidity and heavy metals including Cd, Hg, As, Ni, Cu, Pb, Cr and Zn were analyzed. The potential ecological risk index method of Hakanson was adopted to evaluate the ecological risk of soil around the landfill sites. The results showed that landfill leachate reduced the pH of the soil around the Lhasa Leachate Treatment Station, and the content of Cd, As and Zn in the two monitoring sites were higher than the background values of soil elements in Lhasa and in China. Among them, the largest contribution to the pollution was Cd, which was 6.67 times of the background values in Lhasa and 8.25 times of that in China. The RI values of the two monitoring sites were within the limits of 150≤RI < 300, which were of medium level of pollution, and the site of the southwest was more polluted.
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  • 收稿日期:  2019-08-14

拉萨垃圾填埋场渗滤液处理站周边土壤重金属含量分析及评价

    通讯作者: 旦增, E-mail: yongzhong2008@163.com
  • 1. 西藏大学理学院, 拉萨, 850000;
  • 2. 天津大学环境科学与工程学院, 天津, 300072
  • 收稿日期:  2019-08-14
基金项目:

国家自然科学基金（51668056），西藏大学科研培育基金之成长计划项目（ZDTSJH19-14）和西藏自治区重点科技计划（Z2016C01G01106）资助.

摘要: 填埋是西藏城乡生活垃圾处理处置主要方式.受垃圾填埋场渗滤液的影响，垃圾填埋场周边环境污染问题越来越引起社会关注.本文于2018年3月22日对拉萨市渗滤液处理站正南50 m和西南200 m处进行土壤采样，分析土壤酸度及Cd、Hg、As、Ni、Cu、Pb、Cr、Zn等8种重金属含量水平，采用Hakanson潜在生态风险危害法对垃圾填埋场周边土壤生态风险进行分析评价.结果表明，受垃圾渗滤液的影响，垃圾渗滤液处理站周边土壤酸度降低；Cd、As和Zn等3种重金属在两个监测点的含量均高于拉萨城市土壤元素背景值和中国土壤元素背景值，其中污染贡献率最大的是Cd，分别是拉萨城市土壤背景值的6.67倍和中国城市土壤元素背景值的8.25倍；根据两个监测RI值可知，150≤RI<300为中等生态危害，其危害程度为西南200 m>正南50 m.

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