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.
出处
《环境污染与防治》
CAS
CSCD
北大核心
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)
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
Baihua Reservoir
water-level-fluctuating be lt
geoaccumulation index
potential ecological risk in-dex
heavy metals
risk assessment
