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RBCA和CLEA模型在某重金属污染场地环境风险评价中的应用比较

施烈焰 曹云者 张景来 李发生

施烈焰, 曹云者, 张景来, 李发生. RBCA和CLEA模型在某重金属污染场地环境风险评价中的应用比较[J]. 环境科学研究, 2009, 22(2): 241-247.
引用本文: 施烈焰, 曹云者, 张景来, 李发生. RBCA和CLEA模型在某重金属污染场地环境风险评价中的应用比较[J]. 环境科学研究, 2009, 22(2): 241-247.
SHI Lie-yan, CAO Yun-zhe, ZHANG Jing-lai, LI Fa-sheng. Comparison of Application of RBCA and CLEA Model for Health Risk Assessment of a Heavy Metal Contaminated Site[J]. Research of Environmental Sciences, 2009, 22(2): 241-247.
Citation: SHI Lie-yan, CAO Yun-zhe, ZHANG Jing-lai, LI Fa-sheng. Comparison of Application of RBCA and CLEA Model for Health Risk Assessment of a Heavy Metal Contaminated Site[J]. Research of Environmental Sciences, 2009, 22(2): 241-247.

RBCA和CLEA模型在某重金属污染场地环境风险评价中的应用比较

基金项目: 环境保护部环保公益性行业科研专项(200709033);科学技术部科研院所社会公益研究专项(2005DIB3J161)

Comparison of Application of RBCA and CLEA Model for Health Risk Assessment of a Heavy Metal Contaminated Site

  • 摘要: 应用美国的RBCA模型和英国的CLEA模型对某重金属污染场地中的4种主要重金属污染物As,Cd,Pb和Zn进行健康风险评价,并利用克里格插值方法初步分析了案例场地中风险的空间分布特征.结果表明,RBCA和CLEA模型各有其优缺点,应根据场地的实际情况选择模型进行风险评价.该场地重金属污染的非致癌风险主要来自Pb和Cd,致癌风险主要来自As.尽管w(Zn)很高,但其风险很低,远低于可接受的风险水平.分别应用2种模型计算的风险在大部分情况下基本一致,尽管有一些差异,但均在同1个数量级之内.对于部分采样点的Cd的风险,2种模型的计算结果相差2个数量级,致使总非致癌风险的计算结果差异很大,这主要是由于2种模型在暴露途径的选取上的差异所致.从暴露途径的贡献率来看,地下水摄入途径引起的风险较高,贡献率为50%以上;蔬菜摄入途径引起的风险贡献率为20%左右.风险的空间分布也由于2种模型在暴露途径的选取上存在差异而表现出一定的不同.

     

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出版历程
  • 收稿日期:  2008-04-21
  • 修回日期:  2008-05-30
  • 刊出日期:  2009-02-25

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