百花水库消落带及库岸土壤重金属空间分布和风险评价  

Spatial distribution and risk assessment of heavy metals in soil from water-level-fluctuating belt and bank around Baihua Reservoir

作　　者：肖晶[1] 李秋华[1] 孙荣国[2] 陈峰峰[3] 刘送平[1] 李小峰[2] 邓龙[1] 

机构地区：[1]贵州师范大学贵州省山地环境信息系统与生态环境保护重点实验室,贵州贵阳550001 [2]贵州师范大学化学与材料科学学院,贵州贵阳550001 [3]贵州医科大学公共卫生学院,贵州贵阳550001

出　　处：《环境污染与防治》2016年第11期31-37,共7页Environmental Pollution & Control

基　　金：国家自然科学基金资助项目(No.41563012);贵州省科技厅贵州省科技创新人才团队建设项目(黔科合人才团队[2013]4024);贵州省教育厅贵州省高校工程技术研究中心建设项目(黔教合KY字[2013]113)

摘　　要：为研究百花水库消落带及库岸土壤重金属的空间分布特征和风险水平,于2015年5月(丰水期)采集百花水库库岸区、消落区和淹没区的土壤样品,并分析了Hg、As、Cd、Pb、Cr 5种重金属的浓度。采用地质累积指数法和潜在生态危害指数法对土壤中重金属的风险程度进行评价。结果表明,不同重金属的污染程度空间分布差异较大。从同一采样点的不同区域分析,5种重金属的各个分区平均浓度均表现为淹没区>库岸区>消落区,因此各个分区的潜在生态危害指数平均值也表现出同样的规律。地质累积指数法和潜在生态危害指数法的评价结果存在一定偏差,但可以确定Hg和Cd为百花水库消落带及库岸的主要风险重金属。In order to explore spatial distribution and risk level of heavy metals in soil,soil samples were collected from bank zone, water-level-fluctuating zone and drowned zone around Baihua Reservoir in May,2015. The concentrations of Hg, As, Cd, Pb and Cr were analyzed and the risk level was evaluated based on geoaccumulation index method and potential ecological risk index method. Results showed that the heavy metals had significant spatial distribution. The mean concentrations and potential ecological risk index of 5 heavy metals in different regions both showed drowned zone〉bank zone〉 water-level-fluctuating zone. Although the results of geoaccumulation index method and potential ecological risk index method had some difference, it was sure that Hg and Cd were the major risky heavy metals in soil around Baihua Reservoir.

关 键 词：百花水库 消落带 地质累积指数 潜在生态危害指数 重金属 风险评价 

分 类 号：X524[环境科学与工程—环境工程] X53X820.4