安徽农业大学学报2018，Vol.45Issue(1)：131-137,7.DOI:10.13610/j.cnki.1672-352x.20171214.004
改进模糊数学法在土壤重金属污染评价中的应用
Application of fuzzy mathematical model in pollution evaluation of soil heavy metals
摘要
Abstract
Determining weights of heavy metal contamination is important in the soil environment quality assessment.Used Zn,Cd,Pb,Cu,As and Hg in suburban vegetable soil of Huaxi district as the pollution factors and applied the principle of minimum relative information entropy.This study employed "the excessive multiplier method" and "the double weight excessive weighting method" as a set of combined weight factors,which was used to optimized fuzzy comprehensive evaluation model.Results showed that 31 sampling points in the Class Ⅰ and 13 sampling points in the Class Ⅱ.Compared with the traditional fuzzy comprehensive evaluation model,the optimized fuzzy comprehensive evaluation model which integrates the heavy metals concentration and toxicity level when calculated weight of pollution factors,and the evaluation results of optimized model are more objective and reasonable.The space distribution of soil heavy metals pollution was analyzed by ArcGIS 9.3,the calculated results showed that the research area soil clean ratio reached 83.87％ and moderately clean ratio was 16.13％,soil pollution area not yet appeared关键词
土壤/重金属/模糊综合评价模型/GISKey words
soil/heavy metals/fuzzy comprehensive evaluation model/GIS分类
资源环境引用本文复制引用
段志斌,王济,宣斌,蔡雄飞..改进模糊数学法在土壤重金属污染评价中的应用[J].安徽农业大学学报,2018,45(1):131-137,7.基金项目
贵州省科技支撑计划项目(黔科合支撑[2017]2580号)和贵州省科学技术基金重点项目(黔科合JZ字[2014]2012号)共同资助. （黔科合支撑[2017]2580号）
