重金属毒性权重赋值的土壤地球化学质量模糊综合评价——以内江市白马镇为例  

Fuzzy Comprehensive Evaluation on Soil Geochemical Quality by Using the Toxicity Weight Assignment of Heavy Metals

作　　者：谭晓莲[1] 施泽明[1] 罗改[1] 

机构地区：[1]成都理工大学,四川成都610059

出　　处：《安徽农业科学》2008年第25期11013-11016,共4页Journal of Anhui Agricultural Sciences

基　　金：高等学校博士学科点专项科研基金(20060616020)项目;四川省内江市白马镇土地整理区农业地质调查项目(J-17)

摘　　要：不同的重金属元素具有不同的毒性。传统的模糊数学污染物浓度超标赋权法未考虑重金属自身的毒性,不能反映元素的实际生态效应。在模糊数学综合评价基础上,将重金属的毒性纳入权重考虑,通过污染物浓度超标赋权法、毒性响应系数反推指数赋权法和重金属毒性大小排序赋权法的模糊综合评价结果与潜在生态危害指数评价结果比较,研究表明毒性响应系数反推指数赋权法的评价结果更能真实准确地反映实际结果。Various heavy metals have different toxicity. Traditional fuzzy matheruatics exceeding standard weighting method of pollutant concentration hasn＇ t taken the toxicity of heavy metals into account and couldn＇ t reflect the actual ecological effect of elements. Based on fuzzy mathematics comprehensive evaluation, the toxicity of heavy metals was taken into account. The fuzzy comprehensive evaluation results by pollutant concentration exceeding standard weighting method, toxic response coefficient back-stepping index weighting method and heavy metal toxicity sorting weighting method were compared with the potential ecological risk evaluation results. The research results showed that the evaluation results by toxic response coefficient back-stepping index weighting method could reflect the actual results more truly and accurately.

关 键 词：重金属 模糊综合评价 毒性权重赋值 

分 类 号：S151.95[农业科学—土壤学]