摘要
通过齐大山矿区不同复垦年限土壤重金属含量变化的趋势,应用内梅罗综合污染指数法和潜在生态危害指数法对土壤重金属污染状况进行了评价。结果表明:未复垦土壤重金属含量(除As外)均高于辽宁省背景值,随复垦年限的增加,矿山复垦土壤重金属含量多数呈先增加后减少的趋势。以国家《土壤环境质量标准》(GB15618-1995)为评价标准,Ni处于警戒级;Cd在未复垦地区处于警戒级,复垦后处于安全级;其他元素皆处于安全级。以辽宁省土壤背景值为标准,产生潜在生态危害的主要为Hg和Cd;Zn、Cu、Ni、Pb、Cr和As属轻微危害水平;复垦后总的潜在生态风险程度由中等变为轻微。
According to the variation trend of heavy mentals contents in different reclaimed years in Qidashan mine area,the authors evaluated the pollution situation of heavy metals using Nemero integrated pollution index and potential ecological risk index assessments.The results show that the contents of heavy mentals（except As） in not reclaimed soil are higher than the background value of Liaoning Province,and most of them increased and then decreased with the increasing of reclaimed years.Using National Standard（GB15618-1995）as evaluation standard,Ni is in alert level;Cd is in alert level in not reclaimed area,but becomes in safe level after the area reclaimed;the others are in safe level.Taking the background value of Liaoning Province as evaluation standard,the main elements of potential ecological risk are Hg and Cd;Zn,Cu,Ni,Pb,Cr and As which are slight in harm,and the potential ecological risk changed in degree from moderate to light after reclamation.
出处
《世界地质》
CAS
CSCD
2010年第4期569-574,613,共7页
World Geology
基金
吉林大学创新项目(421030494422)
关键词
齐大山铁矿
复垦
土壤重金属
污染评价
Qidashan iron mine
reclamation
soil heavy metals
pollution assessment
