摘要
以云南省香格里拉县雪鸡坪铜矿区的表层土壤(深度:0~20 cm)为研究对象,采集了17个表层土壤样品,分析表层土壤中Hg、Cd、Pb、Cr、Cu、Zn、As等重金属元素含量,并采用地积累指数法和潜在生态风险指数法评价其生态风险程度。研究结果表明:(1)矿区表层土壤中7种重金属元素含量均超过了云南省土壤重金属元素背景值;(2)地积累指数法评价结果表明,矿区各重金属元素的污染程度由强到弱依次为Pb>As>Cu>Hg>Zn>Cd>Cr;(3)潜在生态危害指数法评价结果表明,7种重金属元素的潜在生态危害系数E_(r)^(i)的平均值由大到小分别为E_(r)^(i)(Hg)>E_(r)^(i)(As)>E_(r)^(i)(Cd)>E_(r)^(i)(Pb)>E_(r)^(i)(Cu)>E_(r)^(i)(Cr)>E_(r)^(i)(Zn);(4)雪鸡坪矿区表层土壤的重金属污染水平为中度污染。
Taking the surface soil of 0~20 cm from Xuejiping Copper Mining area in Shangri-La County,Yun⁃nan Province as the research object,17 surface soil samples were collected to analyze the contents of heavy met⁃al elements,such as Hg,Cd,Pb,Cr,Cu,Zn and As,in the surface soil,and to evaluate the degree of ecological risk by using the geo-accumulation index method and potential ecological risk index method.The results showed that:(1)7 kinds of heavy metal element in the copper mining area exceeded the background value of heavy metal elements in the soil of Yunnan Province.(2)The evaluation results of geo-accumulation index method showed that the pollution degree of each heavy metal element in the mining area from strong to weak was as following Pb>As>Cu>Hg>Zn>Cd>Cr.(3)The evaluation results of the potential ecological risk index method showed that the average value of the potential ecological risk index E_(r)^(i)of 7 heavy metals in the mining area from high to low was as following E_(r)^(i)(Hg)>E_(r)^(i)(As)>E_(r)^(i)(Cd)>E_(r)^(i)(Pb)>E_(r)^(i)(Cu)>E_(r)^(i)(Cr)>E_(r)^(i)(Zn).(4)The level of heavy metal pollution was moderate in the surface soil at the Xuejiping Mining Area.
作者
陈文德
朱坤
姚文文
黄钟宣
何政伟
CHEN Wende;ZHU Kun;YAO Wenwen;HUANG Zhongxuan;HE Zhengwei(College of Tourism and Urban Planning,Chengdu University of Technology,Chengdu 610059,China;College of Earth Sciences,Chengdu University of Technology,Chengdu 610059,China)
出处
《高原科学研究》
CSCD
2021年第2期5-12,26,共9页
Plateau Science Research
基金
中国地质调查局地质调查项目(12120113095400)。
关键词
雪鸡坪铜矿区
地积累指数法
潜在生态危害指数法
土壤重金属
污染评价
Xuejiping Copper Mining Area
geo-accumulation index method
potential ecological risk index method
heavy metal in soil
pollution evaluation