辽东树基沟铜锌矿矿区表层土壤重金属分布  

Heavy Metal Distribution in the Surface Soil of Shujigou Copper-Zinc Mining Area Eastern Liaoning

作　　者：杨丽丽[1] 姚玉增[2] 贾晟哲 张秋莹 胡嘉哲 刘洋[1] YANG Lili;YAO Yuzeng;JIA Chengzhe;ZHANG Qiuying;HU Jiazhe;LIU Yang(Shenyang Ligong University,Shenyang 110159,China;Northeastern University,Shenyang 110004;Dalian University of Technology,Dalian 116024)

机构地区：[1]沈阳理工大学环境与化学工程学院,沈阳110159 [2]东北大学资源与土木工程学院,沈阳110004 [3]大连理工大学,辽宁大连116024

出　　处：《沈阳理工大学学报》2018年第1期17-22,共6页Journal of Shenyang Ligong University

基　　金：国家自然科学基金资助项目(51504154);辽宁省教育厅高等学校科技研究青年资助项目(LG201706)

摘　　要：在辽东树基沟铜锌矿矿区垂直于矿体的3条勘测线上布置采样点,研究3条勘测线上表层土壤的Cu、Zn、Cd、Pb、Hg分布情况,对于揭示地下隐伏矿体的位置或走向具有重要参考意义。通过采用《土壤环境质量标准(GB15618-1995)》中2级评价标准(pH<6.5),用单项污染指数法和Nemero综合污染指数法对表层土壤的重金属污染及其农耕的生态风险进行评价。结果表明:Cu、Zn、Cd含量高于或接近当地土壤背景值,来源与铜锌矿有关。各元素Nemero综合污染指数为Cu1.29,属轻度污染;Zn、Cd、Pb、Hg的综合污染指数均低于0.7,未造成污染。仅4#勘测线的土壤受到Cu污染,且4-5、4-6采样点为Zn、Cu最大富集处,含量异常,推测4-5、4-6采样点的矿化程度最高、距离地下隐伏矿体最近,与4-5、4-6采样点的连线相垂直的方向可能代表隐伏矿体穿越4#勘测线的走向。Sampling points were arranged along three exploratory lines being perpendicular to the direction of orebody in Shujigou Copper-Zinc mining area,eastern Liaoning.Concentrations of Cu,Zn,Cd,Pb and Hg in the surface soil were studied to ascertain the heavy metals distribution.This has important significance for disclosing the location or strike of orebody.And according to the evaluation criterion(pH<6.5)for Grade II(GB15618-1995),methods of the single-factor pollution index and the Nemero comprehensive pollution index were applied to evaluate the heavy metal pollution and its potential ecological risk for farm.The result shows that soil pH ranges from 5.88 to 6.30 and the contents of Cu,Zn,Cd are higher than or approximate local soil background values,which reveals a copper-zinc ore origin.The Nemero comprehensive pollution indexes of copper is 1.29,and that of the rest 4 elements(Zn,Cd,Pb,Hg)are less than 0.7,which shows a light contamination for Cu and no contamination for Zn,Cd and Pb.Only the soil on line 4 is contaminated by Cu.Maximum concentrations of Cu and Zn occurred at Sampling points 4-5 and 4-6,where it is probably nearest to the concealed ore body underground.

关 键 词：表层土壤 重金属分布 铜锌矿 树基沟矿区 

分 类 号：X53[环境科学与工程—环境工程]