毗邻铁矿的千山景区土壤重金属污染分析与评价  

Analysis and Assessment on the Heavy Metal Pollution in Soil of Qianshan Scenic Adjacent to Iron Mine

作　　者：杨维[1] 高雅玲[1] 康志勇 李仁峰 王硕[1] 

机构地区：[1]沈阳建筑大学市政与环境工程学院,辽宁沈阳110168 [2]辽宁省冶金地质勘查局地质勘查研究院,辽宁鞍山114002

出　　处：《沈阳建筑大学学报（自然科学版）》2010年第1期150-155,共6页Journal of Shenyang Jianzhu University：Natural Science

基　　金：辽宁省自然科学基金项目(20072012)

摘　　要：目的了解毗邻铁矿的千山景区土壤重金属污染状况,为景区的环境治理和铁矿的排污规范提供数据基础和科学依据.方法采用基于重金属质量浓度和毒性的双权重内梅罗综合污染指数法和潜在生态危害指数法对土壤质量进行评价.结果采矿场周边区域重金属均未超标,属于安全区、轻微潜在危害级;排岩场和尾矿库周边土壤Pb含量明显偏高,尽管属于轻微的潜在危害级,但内梅罗评价结果为警戒区,土壤存在恶化趋势;尾矿库至五佛顶区域属中重度污染区,Cd的单项潜在生态危害系数达到了强危害水平,且土壤各重金属有效态含量高于其他区域,植被生长受损症状已经凸显.结论铁矿开采产生的重金属等有毒物质通过多种途径进入周边环境,已经对与之毗邻的千山景区土壤及植被造成了影响.The purpose of this article is to grasp the situation of heavy metal pollution in Qianshan scenic soil adjacent to iron mine and to provide data base and scientific basis for the environmental governance of scenic spot and sewage norms of iron mine. Methods of evaluation are potential ecological risk index and Nemerow index which are based on the concentration and toxicity of heavy metals. The results show that the soil around the mining in which heavy metals are all within the standard of regulations belongs to security and slight potential hazard. The soil from ore-discharge and tailings field is both of slightly ecological hazard and on alert level in which Pb is significantly higher. The area between railings and Wufoding has been polluted moderately and Cd is a serious ecological hazard factor. Moreover, the effective fraction of heavy metals is higher than that of other regions, and vegetation there has highlighted the damage symptoms. Heavy metals generated by iron ore mining have entered into the surrounding environment through various channels, which have made negative effect on soil and vegetation of Qianshan scenic spot.

关 键 词：千山景区 铁矿 土壤重金属污染 潜在生态危害指数 内梅罗指数 双权重 

分 类 号：X53[环境科学与工程—环境工程]