文章摘要
韩平,王纪华,冯晓元,马智宏,陆安祥,魏荔,闫连波.北京顺义区土壤重金属污染生态风险评估研究[J].农业环境科学学报,2015,34(1):103-109.
北京顺义区土壤重金属污染生态风险评估研究
Ecological Risk Assessment of Heavy Metals in Soils in Shunyi, Beijing
投稿时间:2014-09-11  
DOI:10.11654/jaes.2015.01.015
中文关键词: 土壤重金属  地积累指数  生态危害指数  生态风险评估
英文关键词: soil heavy metal  index of geo-accumulation(Igeo)  potential ecological risk index(RI)  ecological risk assessment
基金项目:北京市农林科学院青年科研基金项目(QNJJ201312);北京市农林科学院科技创新能力建设专项农产品质量与农田环境基础数据平台建设项目(KJCX20140302);2014年北京蔬菜产品质量安全风险评估(GJFP2014001)
作者单位E-mail
韩平 北京农业质量标准与检测技术研究中心, 北京 100097
农业部农产品质量安全风险评估实验室(北京), 北京 100097 
 
王纪华 北京农业质量标准与检测技术研究中心, 北京 100097
农业部农产品质量安全风险评估实验室(北京), 北京 100097 
Wangjh@nercita.org.cn 
冯晓元 北京农业质量标准与检测技术研究中心, 北京 100097
农业部农产品质量安全风险评估实验室(北京), 北京 100097 
 
马智宏 北京农业质量标准与检测技术研究中心, 北京 100097
农业部农产品质量安全风险评估实验室(北京), 北京 100097 
 
陆安祥 北京农业质量标准与检测技术研究中心, 北京 100097
农业部农产品质量安全风险评估实验室(北京), 北京 100097 
 
魏荔 北京市顺义区农业科学研究所, 北京 101300  
闫连波 北京市顺义区农业科学研究所, 北京 101300  
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中文摘要:
      在北京顺义区农业用地采集了412份土壤表层样品,采用地积累指数法和潜在生态危害指数法对区域土壤重金属污染生态风险进行评估.结果表明:研究区土壤6种重金属元素(Cu、Zn、Pb、Cd、As和Hg)的地积累指数(Igeo)平均值均小于0,处于无污染程度;但处于Hg、Zn和Cd"轻度-中等污染"和"中等污染"的土壤样本分别有12.6%、12.9% 和17.0%.土壤重金属生态风险指数(RI)平均值为93.07,属于轻度生态危害;轻度、中等和强度生态危害的比例分别为95.6%、3.9% 和0.5%;均有超过20% 的土壤样本处于Hg和Cd中等生态危害以上的水平;从不同土地利用类型中土壤样本的RI分析,菜地土壤RI平均值为109.55,达到中等污染等级的比例为14.3%.从研究区土壤重金属生态危害指数的空间分布特征分析,区域内潮白河、小中河和金鸡河对区域生态存在影响.
英文摘要:
      Soil heavy metals possess latent and long-term risks to human health. Here we collected 412 surface soil samples from agricultural soils of Shunyi district of Beijing and used the index of geo-accumulation(Igeo) and potential ecological risk index(RI) to evaluate the ecological risks of heavy metal pollution in soils. The results revealed that the average Igeo values of heavy metal Cu, Zn, Pb, Cd, As and Hg were less than 0, belonging non-pollution. However, there were 10% of soil samples in which Igeo of Cu, Cd and Hg were at low or moderate pollution levels. The average RI value of all soil samples was 93.07 in studied area, having mild ecological hazards. About 95.6%, 3.9% and 0.5% of soil samples were in mild, moderate and high ecological hazards, respectively. For Hg and Cd, more than 20% of soil samples were in moderate ecological hazards. The mean value of RI was 109.55 in vegetable soils and 14.3% of soil samples were at medium pollution level. Spatial distribution of ecological risk indices of heavy metals in soils of studied area indicated that Chaobai, Xiaozhong and Jinji rivers had the ecological risk.
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