涞源县南赵庄铅锌矿外围耕地重金属迁移研究  

Study on migration of heavy metals in outer arable land of Nanzhaozhuang lead-zinc mine in Laiyuan County

作　　者：兰晓峰 李龙飞 王红云 张延夕 张国维 魏静 LAN Xiaofeng;LI Longfei;WANG Hongyun;ZHANG Yanxi;ZHANG Guowei;WEI Jing(Hebei Institute of Geology Survey,Shijiazhuang Hebei 050081;Baoding Ecological Environment Monitoring Center,Baoding Hebei 071000)

机构地区：[1]河北省地质调查院,河北石家庄050081 [2]保定市生态环境监控中心,河北保定071000

出　　处：《环境污染与防治》2023年第5期645-649,共5页Environmental Pollution & Control

基　　金：河北省财政厅资助项目(No.454-0801-JBN-Y4VF、No.13000022P006CA410121N)。

摘　　要：为探究涞源县铅锌矿周边耕地中铅、锌迁移特征,以涞源县南赵庄铅锌矿外围耕地为研究区,采集土壤、大气沉降物等样品。通过大气沉降物中铅、锌的年通量特征和表层土壤中铅、锌的形态特征推断重金属迁移方式和途径;通过铅、锌含量和衰减率随距离变化研究铅、锌的迁移范围和能力特征。结果表明:研究区内表土中铅、锌除背景来源外,主要来源于铅锌矿尾矿库的尾砂和废渣,大气沉降作用对其迁移作用很小,土壤中铅、锌主要通过地表径流冲刷作用进行迁移;水平方向上,随着与尾矿库距离的增加,铅、锌含量总体均呈现出衰减趋势,大于300 m的范围区域中铅、锌的衰减率相对接近,铅、锌迁移扩散作用主要发生在距离尾矿库边缘700 m以内的区域。In order to explore the migration characteristics of lead and zinc in the arable land around the lead-zinc mine in Laiyuan County,take the outer arable land of Nanzhaozhuang lead-zinc mine in Laiyuan County as the study area,and collected soil and atmospheric sediment samples.Based on the annual flux of lead and zinc in atmospheric sediment and the morphological characteristics of lead and zinc in surface soil,modes and pathways of lead and zinc migration were inferred.By analysis relationship between lead,zinc content and distance,as well as decay rate and distance,the migration range and ability characteristics of lead and zinc were studied.The results showed that:in addition to background sources,the lead and zinc in the surface soil were mainly from the tailings and waste residue of lead-zinc mine tailings impoundment.Atmospheric subsidence had little effect on its migration,mainly through surface runoff scouring.In the horizontal direction,with the increase of distance away from the tailings impoundment,the content of lead and zinc generally showed a decay law,the decay rates of lead and zinc in the area over 300 m tended to be similar.The migration and diffusion of lead and zinc mainly occurred in the area within 700 m from the edge of the tailings impoundment.

关 键 词：铅锌矿 土壤 大气沉降物 形态 迁移特征 

分 类 号：X53[环境科学与工程—环境工程]