An integrated assessment model for heavy metal pollution in soil based on triangular fuzzy numbers and chemical speciation of heavy metal
An integrated assessment model for heavy metal pollution in soil based on triangular fuzzy numbers and chemical speciation of heavy metal
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发表时间：
2012
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通讯作者：
Zhu Huina
中科院分区：
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作者：
Zhu Huina
将三角模糊数理论引入环境评价体系中，设计了重金属生物毒性的双权重体系，定量表征不同重金属的生物毒性和单重金属不同化学形态的生物毒性，建立了基于地积累指数的综合评价模型，并以实例进行了验证。以石家庄顶典型污灌区土壤重金属污染为例，对所建立的综合评价模型进行验证，结果表明，5种重金属的综合评价值差异显著，其综合污染程度依次为CdNiCuZnCr，Cd，结果表明，综合评价模型克服了单一评价模型的不足，更准确地传达土壤重金属富集程度和重金属污染潜在生物风险的信息，为科学决策提供理论依据。
The triangular fuzzy numbers theory was introduced to environmental assessment system.Double weighting system of heavy metal biology-toxicity was designed,which could characterize the biology-toxicity of different heavy metals and the biology-toxicity of different chemical speciation of every single heavy metal quantitatively.Afterwards,an integrated assessment model based on the index of geo-accumulation was built.As a model case,the soil pollution of heavy metal in Shizhuangding typical sewage irrigation area was selected to test and verify the integrated assessment model.The results showed that the integrated assessment value of the 5 heavy metals were markedly different,while their integrated pollution degree were in the order CdNiCuZnCr,and the Cd,Ni and Cu would be the primary pollution controlling factors in Shizhuangding typical sewage irrigation area.Compared with the result of the certain assessment model,it was concluded that the integrated assessment model overcame the shortcomings of the certain assessment model,by conveying information about both degree of heavy metal enrichment and potential biological risk of heavy metal pollution in soil more accurately which provided the basic theory to scientific decision-making.