贵安新区土壤生态环境风险评价及空间分异特征研究  

Soil ecological risk assessment and spatial differentiation characteristics of Gui′an District

作　　者：刘发勇 何林 田祥贵 LIU Fayong;HE Lin;TIAN Xianggui(Guizhou Panjiang Coal Power Group Technology Research Institute Co.Ltd.,Guiyang 550081,China)

机构地区：[1]贵州盘江煤电集团技术研究院有限公司,贵州贵阳550081

出　　处：《贵州科学》2024年第1期54-57,共4页Guizhou Science

基　　金：贵州省中央引导地方科技发展资金项目(黔科中引地〔2021〕4005);贵州省科技项目一般项目(黔科合支撑〔2022〕一般016)。

摘　　要：通过采用地统计学空间插值对贵安新区土壤重金属数据进行处理,得出贵安新区土壤重金属的空间分布格局,并根据土壤pH环境进行各元素的评价风险分析,结果显示:贵安新区土壤重金属综合污染指数为1.054,为轻度污染,重金属元素单项平均污染指数排序As>Zn>Cr>Hg>Cd>Pb;土壤重金属含量复合生态风险指数为42.26,小于150,处于轻微生态危害级别,单项生态危害系数排序为Hg>As>Cd>Cr>Pb>Zn,As元素对土壤环境的污染比较严重,生态危害系数也较高。By using geostatistical spatial interpolation to process the soil heavy metal data of Gui′an District,the spatial distribution pattern of soil heavy metals of Gui′an District is obtained,and the risk evaluation of each element is performed according to soil pH environment.The results show that the soil heavy metal pollution index for Gui′an District is 1.054,indicating light pollution.The average pollution index of each heavy metal element is As>Zn>Cr>Hg>Cd>Pb.The soil heavy metal complex eco-risk index is 42.26,less than 150,indicating slight eco-risk.The eco-risk index of each heavy metal element is Hg>As>Cd>Cr>Pb>Zn.Arsenic presents more serious pollution on the soil environment,and has higher eco-risk index than other elements.

关 键 词：土壤重金属 生态风险 GIS 贵安新区 

分 类 号：S153[农业科学—土壤学]