农业用地土壤重金属综合评价方法  

Comprehensive evaluation of heavy metal for agricultural environmental soil land

作　　者：王圣伟[1,2] 刘刚[2] 冯娟[2] 张天蛟[2] 

机构地区：[1]西北师范大学计算机科学与工程学院,甘肃兰州730070 [2]中国农业大学现代精细农业系统集成研究教育部重点实验室,北京100083

出　　处：《江苏大学学报（自然科学版）》2014年第4期408-415,共8页Journal of Jiangsu University：Natural Science Edition

基　　金：国家高技术研究发展计划项目(2011AA100704);西北师范大学青年教师科研能力提升项目(NWNU-LKQN-13-11)

摘　　要：利用6种重金属元素Pb,Cd,Cu,Cr,Zn和类重金属As构建综合评价标准,提出生态毒性和健康因子相结合的模糊修正综合评价模型.利用Hakanson毒性系数修正方法进行生态和人体健康毒性因子的权重归一化,对比验证表明模型具有较高的分辨率和有效性.引入农田土地分等AEZ方法进行重金属评价比较,对比研究区域47个农用地土地分类图斑的综合评价结果,其中有一定重金属污染程度的土地占总数29.8%,面积比例为32.1%,土地分类级别与重金属污染具有一定的正比效应.研究结果表明所提出的方法适用于农田土壤的重金属综合评价决策.The comprehensive evaluation method of heavy metal for pollution agricultural environmental soil land was investigated. The criterion of heavy metal comprehensive evaluation was established based on the heavy metal elements of Pb, Cd, Cu, Cr, Zn and similar heavy metal of As. The corrected fuzzy comprehensive evaluation model with ecological toxicity and health factor was proposed with high resolution and efficiency. The comparison evaluation of 47 delineations of soil for farmlands was conducted. The assessment results show that there are 33 uncontaminated grade polygon plots, and other 14 patterns appear under the state of second pollution stage. The heavy metal pollution plots account for 29.8% with total land area ratio of 32. 1%. The land classification level is proportional to heavy metal pollution stage. The proposed comprehensive evaluation of heavy metal is suitable for agricultural environmental soil land.

关 键 词：农业用地 重金属 模糊综合评价 生态健康 土地分等 

分 类 号：X825[环境科学与工程—环境工程]