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时间:2020-03-25
《广东大宝山矿区横石河沿岸水土重金属分布规律及其累积风险.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、第33卷第8期地质通报Vol-33.No.82014年8月GEoLoGICALBULLETINOFCHINAAug.,2014广东大宝山矿区横石河沿岸水土重金属分布规律及其累积风险宿文姬,徐友宁,凡生,付善明。SUWen-ji,XUYou—ning2,FANSheng,FUShan—ming。1.华南理工大学土木与交通学院,广东广州510640;2.中国地质调查局西安地质调查中心,陕西西安710054:3.广州大学环境科学与工程学院,广东广州5100061.SchoolofCivilEngineeringandTransp
2、ortation,SouthChinaUniversityofTechnology,Guangzhou510640,Guangdong,China;2.Xi"anCenterofGeologicalSurvey,CGS,Xi"an710054,Shaanxi,China;3.SchoolofEnvironmentalScienceandEngineering,GuangzhouUniversity,Guangzhou510006,Guangdon&China摘要:研究矿业活动重金属的释放、迁移及累积特征对于控制和治理矿区水
3、土环境污染具有重要的意义。本文通过广东大宝山矿区水土污染源调查及横石河流域沿岸水土样品采集,以研究区土壤对照值及国家环境质量为标准,试图探讨了大宝山矿区重金属迁移及累积特征。研究结果表明,横石河沿岸土壤重金属元素主要来自采矿活动的酸性废水的排放,土壤中Cd、Pb、Cu和Zn的含量均超过对照值,呈现出明显的累积特征,且Cd、Cu含量超过了国家土壤环境质量标准;土壤中重金属累积程度及其风险等级呈现出从源头向下游递减的特点,其中凉桥、水楼下地段农田重金属处于高风险区,阳河一莲心村虽有累积,但无风险;上坝村地处土壤重金属累积的中风
4、险区,下坝村处于低风险区。研究结果为矿区重金属污染防治提供了重要依据。关键词:重金属;酸性水;累积风险;上坝村;大宝山矿区中图分类号:X131.3;X142文献标志码:A文章编号:1671—2552(2014)08—1231—08SuWJ,XuYN,FanS,FuSn.ThedistributionregularityandaccumulationriskofheavymetalsinwaterandsoilalongtheHengshiRiverintheDabaoshanminingarea,GuangdongProv
5、ince.GeologicalBulletinofChina,2014,33(8):1231—1238Abstract:Thestudyoftherelease,migrationandaccumulationcharacteristicsofheavymetalsbyminingactivitiesisofimportantsig—nificanceforthepreventionandcontrolofenvironmentalpollutionofsoilandwaterintheminingarea.Inthisp
6、aper,throughco]]ec—tionofsoilandwatersamplesalongtheHengshiRiverduringthesurveyofDabaoshanminingpollutionandwiththesoilcontrolval—uesofthestudyareaandthenationalenvironmentqualityastheevaluationstandard,theauthorsstudiedmigrationandaccumulationcharacteristicsofhea
7、WmetalsintheDabaoshanminingarea.TheresultshowsthatthesoilheawmetalelementsalongtheHengshiRivermainlycomefromminingactivitiesofacidwastewateremissions,theconcentrationsofsoilCd,Pb,CuandZnarehigherthanthelocalcontrolvalues,showingobviousaccumulationcharacteristics,w
8、ithCd,Cucontentexceedingthenationalstandardofsoilenvironmentalquality.Heavymetalaccumulationinsoilanditslevelofriskdegreeshowdecreasingcharacteristicsfr
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