某工业区土壤重金属污染及生态价值损失评估  

Heavy Metal Pollution in Soil and Its Assessment of Ecological Value Loss in an Industrial Zone

作　　者：蔡莹 张敬东 CAI Ying;ZHANG Jingdong(Research Center for Environment and Health,Zhongnan University of Economics and Law,Wuhan 430073,China;School of Business Administration,Zhongnan University of Economics and Law,Wuhan 430073,China)

机构地区：[1]中南财经政法大学环境与健康研究中心,湖北武汉430073 [2]中南财经政法大学工商管理学院,湖北武汉430073

出　　处：《环境科学与技术》2021年第11期229-236,共8页Environmental Science & Technology

基　　金：国家社科后期资助项目(19FGLB056);中央高校基本科研业务专项项目(31512000061,31510000128);中南财经政法大学研究生创新教育项目(202011019)。

摘　　要：结合Hakanson潜在生态风险理论和Costanza生态价值损失理论,将不同土地利用类型和土壤重金属不同污染等级概率纳入考量,构建基于三角模糊数和随机模拟理论(SS-TFN)的土壤重金属潜在生态风险及其生态价值损失模型。结果表明:土壤重金属元素平均含量依次为Zn>Cr>Pb>Cu>As>Cd,均超过相应的土壤背景值,且Zn和Cd的平均含量超过了《土壤环境质量农用地土壤污染风险管控标准(试行)》的筛选值;研究区土壤整体呈现轻微至强污染水平,大概率(60.5%)呈现中等污染水平,污染负荷主要集中在Cd,且污染有恶化的趋势,单项潜在生态风险指数平均值Cd>Pb>As>Cu>Zn>Cr;研究区的优先控制重金属为Cd、Pb和Zn,优先控制区域为武钢、水泥厂、化工厂等工业企业附近区域;研究区重金属污染导致的每年每公顷农田土壤生态价值损失在178.05~6164.95元,平均3040.05元。Combined with Hakanson’s potential ecological risk theory and Costanza’s ecological value loss theory,the potential ecological risk and ecological value loss model of soil heavy metals based on triangular fuzzy number and stochastic simulation theory(SS-TFN)was established under the consideration of the probability of diverse land use patterns and different pollution levels of soil heavy metals.The results showed the average content of heavy metals in the soil was in the order of Zn>Cr>Pb>Cu>As>Cd,exceeded the corresponding background value,with that of Zn and Cd exceeded the screening value of Soil Environmental Quality-Agricultural Land Soil Pollution Risk Control Standard(Trial).The overall soil pollution level in the study area was light to strong,with high probability(60.5%)of medium pollution level.The pollution load was mainly concentrated in Cd,and the pollution tended to worsen.The average value of single potential ecological risk index was in the order of Cd>Pb>As>Cu>Zn>Cr.The priority control metals were Cd,Pb and Zn,and priority control areas were the areas near industrial enterprises such as Wuhan Iron and Steel,cement plants,chemical plants,etc.The annual loss of soil ecological value per hectare caused by heavy metal pollution in research area was 178.05~6164.95 yuan,with an average of 3040.05 yuan.

关 键 词：土壤重金属 SS-TFN 潜在生态风险 生态价值损失 

分 类 号：X503.1[环境科学与工程—环境工程]