Evaluation on Ecological Risks of Soil Heavy Metals in a Certain Area of Sichuan by Improved Fuzzy Mathematics Method
Taking a certain area in Sichuan Province as the object of this study,this paper adopts fuzzy mathematics method to make an evaluation on ecological risks of heavy metal in soil of this area.On calculation of factors weights,the traditional method of giving weight according to pollutants concentrations fails to consider the toxicity of heavy metals,and cant reflect their actual ecological effect.With reference to the toxicity coefficient in potential ecological risk index evaluation,this article revises the traditional fuzzy mathematics evaluation model and puts forward a new method to calculate factors weight by incorporating toxicity levels in weight setting.The results of this study indicate: surface soil of this area was good in general,with 91.2% samples belonging to the first level,7.77% samples belonging to the second level,and only 1.03% belonging to the third level.Compared with the results of the evaluation method of the reality content of soil,soil quality is better than the results of the quantitative evaluation,and is closer to the actual local conditions.
Fuzzy Mathematics Heavy Metals Soil Contamination Evaluation
Dongxia Cui Qiguo Zhao Wei Xu
Sichuan Normal University,SICNU,Chengdu,China Chengdu Polytechnic,CDP,Chengdu,China Chengdu University of Technology,CDUT,Chengdu,China
国际会议
The International Conference on Environmental Pollution and Public Health(2014年环境污染与大众健康学术会议)
上海
英文
28-35
2014-04-12（万方平台首次上网日期，不代表论文的发表时间）