不同pH条件下有色冶炼厂周边道路尘及土壤中重金属释放特征  

Release Characteristics of Heavy Metal in Road Dust and Soil around Non-ferrous Smelters under Different pH Conditions

作　　者：徐俊 宋佳 刘英 钟萍 蒋雅雪 张丽 张家泉 Xu Jun;Song Jia;Liu Ying;Zhong Ping;Jiang Yaxue;Zhang Li;Zhang Jiaquan(School of Environmental Science and Enginneering, Hubei Polytechnic University, Huangshi Hubei 435003;Key Laboratory of Mine Environmental Pollution Control and Remediafion, Hubei Polytechnic University, Huangshi Hubei 435003;College of Resources and Environmental Engineering, Wuhan University of Science and Technology, Wuhan Hubei 430081)

机构地区：[1]湖北理工学院环境科学与工程学院,湖北黄石435003 [2]湖北理工学院矿区环境污染控制与修复湖北省重点实验室,湖北黄石435003 [3]武汉科技大学资源与环境工程学院,湖北武汉430081

出　　处：《湖北理工学院学报》2018年第2期19-23,共5页Journal of Hubei Polytechnic University

基　　金：湖北省高等学校优秀中青年科技创新团队计划项目(项目编号:T201729);湖北省大学生创新创业训练计划项目(项目编号:201610920010);湖北理工学院校级科研项目(项目编号:16xjz05Q)

摘　　要：以大冶有色冶炼厂为中心,对其周边土壤和道路尘样品中的6种重金属Cu,Pb,Cr,Cd,Zn,Fe的含量进行测定,并探讨pH对道路尘及土壤中重金属释放的影响,以评估其释放特性。结果表明,样品中重金属含量从高到低为:Fe>Cu>Zn>Pb>Cr>Cd(道路尘),Fe>Cu>Pb>Zn>Cr>Cd(土壤)。与土壤中的重金属浓度背景值相比,样品中重金属浓度明显偏高,表明冶炼厂附近重金属的污染比较严重。重金属在空间上分布均一,且各元素之间具有较强的相关性,说明其来源相似,均由金属冶炼等活动导致。重金属在酸性条件下的释放量远大于在中性及碱性条件下的释放量,约为9~10倍。随着释放时间的增加,重金属释放量先上升后下降,最后趋于稳定。The samples of soil and road dust were collected around Daye Nonferrous Smeltery. The contents of Cu,Pb,Cr,Cd,Zn and Fe were measured to investigate the effects of different pH on the release of heavy metals in road dust and soil,and to indicate the release characteristics of heavy metals around non-ferrous smelters. The results showed that the order of heavy metal contents in road dust and soil were Fe Cu Zn Pb Cr Cd and Fe Cu Pb Zn Cr Cd,respectively. Compared with the background values of soil,the contents of these heavy metals were obviously higher,indicating that the pollution of heavy metals near the smelter was more serious. The spatial distribution of heavy metal elements was relatively small and generally distributed homogeneously,showed strong correlation between the elements,indicating that the sources of pollution may be similar mainly due to metal smelting and other activities; Heavy metals released in the acid conditions： were much greater than in the alkaline conditions about 9 to 10 times. With the extension of release time,the amount of metal released first showed an upward trend and then declined to the last level.

关 键 词：道路尘 土壤 PH 重金属 浸出 

分 类 号：X53[环境科学与工程—环境工程]