城市绿地重金属与典型除草剂复合污染生态风险评估研究

项目名称： 城市绿地重金属与典型除草剂复合污染生态风险评估研究

项目编号： No.41271503

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 天文学、地球科学

项目作者： 王美娥

作者单位： 中国科学院生态环境研究中心

项目金额： 75万元

中文摘要： 城市土壤是城市生态系统的主要组成部分，也是城市化的主要风险受体。随着城市化高度发展，城市土壤重金属污染与绿化农药污染越来越严重，城市土壤污染物来源复杂，对城市土壤污染生态风险评价需采用整体方法进行综合评价。本项目拟结合野外调查与实验室内模拟，采用HYDRUS-1D、神经网络模型、复合效应定量模型以及"证据权重法"等数学方法，研究城市草坪典型除草剂环草隆和重金属Cd、Pb、Cu、Zn的复合生态效应、环草隆在城市草坪土壤中的环境行为及累积趋势及其对重金属污染的响应机制以及环草隆和重金属Cd、Pb、Cu、Zn复合污染的整体生态风险，预测重金属污染条件下环草隆在土壤中的累积趋势，揭示土壤中环草隆与重金属复合污染的生态风险产生机制，建立重金属和环草隆复合污染整体生态风险评估与预测方法，为准确评价和科学管理城市绿地土壤环境健康提供科学依据。

中文关键词： 城市绿地；重金属；除草剂；复合污染；整体生态风险评估

英文摘要： Urban soil is the main component of urban ecological systems and the key risk receptor from urbanization. Heavy metal and greenland agrochemical pollutions in urban soils have been widely reported with the expanding of urbanization. Since urban soil pollution comes from various resources,application of integrated methods is needed in ecological risk assessment of urban soil pollution. In this project, we will study the ecological risk of combined pollution of typical herbicide Siduron and heavy metals in urban greenland soils by combining field investigation, aboratory assay, neural network model and dynamical model.Environmental behaviors and accumulation trends of Siduron as well as their mechanisms in heavy metal polluted urban soils will be explored using the HYDRUS-1D model. The integrated ecological risks of Siduron and heavy metals will be assessed by the "evidence-weight" method. The purposes of this project are to predict the accumulation trends of Siduron in heavy metal pollution soils, to reveal the mechanisms of combined ecological risks of Siduron and heavy metals in soils and to establish integrated methods for ecological risk assessment and prediction of heavy metal and Siduron pollution in urban soils, and thus to provide scientific bases for accurately assessing and administrating of the urban s

英文关键词： urban green land；heavy metal；herbicide；combined pollution；integrated ecological risk assessment