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中国农学通报 ›› 2015, Vol. 31 ›› Issue (9): 207-211.doi: 10.11924/j.issn.1000-6850.casb14120042

所属专题: 资源与环境 农业生态 农业地理 耕地保护

• 资源 环境 生态 土壤 气象 • 上一篇    下一篇

污泥在土地利用中的潜在生态风险评价

薛万来,叶芝菡,何春利,李文忠,吴敬东   

  1. 北京市水科学技术研究院,北京市水科学技术研究院,北京市水科学技术研究院,北京市水科学技术研究院,北京市水科学技术研究院
  • 收稿日期:2014-12-05 修回日期:2015-03-10 接受日期:2015-01-13 出版日期:2015-04-07 发布日期:2015-04-07
  • 通讯作者: 薛万来
  • 基金资助:
    水利部“948”项目“蒸渗仪在城镇污泥土地利用研究中的应用”(KY-2013-03)

Assessment of Potential Ecological Risk of Sludge in Land Use

  • Received:2014-12-05 Revised:2015-03-10 Accepted:2015-01-13 Online:2015-04-07 Published:2015-04-07

摘要: 为评估污泥在土地利用中的潜在生态环境风险,笔者对比分析了污泥施用区和对照区土壤样品中As、Cd、Cr、Cu、Ni、Pb、Zn共7种重金属的含量,并采用地积累指数法和潜在生态危害指数法对污泥施用区重金属污染进行了分析和评价。研究结果表明:除Ni和Pb外,其他重金属平均含量较背景值均有所增加;污泥施用区重金属含量与对照区存在显著差异,但其平均值含量均在土壤环境质量II级范围内;从平均地积累指数来看,土壤环境总体上处于无污染状态;重金属元素的潜在生态危害指数除Cd外均处于低度污染,元素Cd有部分处于中度以上污染。可得出结论:潜在生态危害指数由于考虑外源重金属富集和不同重金属生物毒性系数的影响,其评价结果更加精确。

关键词: 植物生长季, 植物生长季, 热量资源, 气候倾向率, 气候突变

Abstract: In order to assess the potential ecological environmental risk of sludge use on soil, the author analyzed 7 kinds of heavy metal (As、 Cd、 Cr、 Cu、 Ni、 Pb and Zn) in sludge application area and control area, analyzed and evaluated heavy metal contamination in sludge application area through the methods of geoaccumulation index and potential ecological risk index. The results showed that: the heavy metal contents were larger than background value except Ni and Pb; there was significant difference of heavy metal content between sludge application area and control area, but the average content was within the range of soil environmental quality level II. According to the geo-accumulation index, soil environment quality was in no pollution state; heavy metals’potential ecological risk was in low pollution status except Cd, Cd was in moderate or above pollution status in some areas. In conclusion, considering the impact of enrichment and biological toxicity of heavy metal, the potential ecological risk index was more accurate.