摘要
综合考虑土壤环境重金属污染的潜在生态风险和受污染土壤中各重金属的生物可利用性差异,建立了基于重金属化学形态的污染场地土壤重金属的模糊综合评价模型.将污染场地土壤重金属的模糊综合评价模型应用于案例污染场地的土壤重金属的污染风险评价中,并将模糊综合评价结果与常用的3种确定性土壤污染评价方法 (单因素指数法、潜在生态危害指数法和地累积评价法)的评价结果进行交叉验证,其评价结果与结果间对比分析表明所架构的模糊综合评价模型一定程度上弥补了传统确定性方法的不足,所建模型创新性加入了量化重金属生物可利用性的权重因子,其评价结果具有更高的可信度和风险辨识度,为我国土壤污染的优先控制因子的筛选和相关政策决策的制定提供了科学的理论基础.
An integrated model for assessing the risk of soil heavy metals pollution based on fuzzy theory was developed. This fuzzy model took both potential ecological risk and bioavailability of soil heavy metals into account. To test and verify this fuzzy model, a case with contaminated site was assessed. With com- parative analysis among 3 widely used assessment methods （ single-factor index, potential ecological risk index and index of geo-accumulation）, the result showed that this fuzzy mode/overcame the shortcomings of the traditional assessment model. The fuzzy model was designed innovatively with the weight on behalf of the biological availability for heavy metals, and it had higher discernibility and carried comprehensive information of soil heavy metals pollution. In short, the developed integrated model for asssessing the risk of soil environmental pollution based on fuzzy theory made scientific basis for determining soil priority control factor at the screening level and corresponding decision-making.
出处
《郑州大学学报（理学版）》
CAS
北大核心
2014年第1期88-93,102,共7页
Journal of Zhengzhou University:Natural Science Edition
关键词
土壤
重金属
生物可利用性
模糊综合评价
soil
heavy metal
bioavailability
fuzzy integrative evaluation
