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时间:2020-06-19
《广西大厂矿区下游农村土壤重金属污染及儿童健康风险评估.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、·512·环境与健康杂志2014年6月第31卷第6期JEnvironHealth,June2014,Vol_31,No6·调查研究·广西大厂矿区下游农村土壤重金属污染及儿童健康风险评估张丽娥,莫招育,覃健,陈志明,熊玉霞,魏艳红,张志勇,邹云锋1.广西医科大学公共卫生学院,广西南宁53002l;2.广西壮族自治区环境保护科学研究院摘要:目的调查广西大厂矿区下游农村土壤中重金属的含量水平,评估其I,LIL童产生的潜在健康风险。方法于2013年7月,采集大厂矿区下游农村的农田土壤(水田土和蔬菜地土),测定As、PI]、cd、cr、№的含量,并运用美国环保署(U
2、SEPA)推荐的健康风险评价模型评估该村儿童(1~6岁)因土壤经多种途径暴露重金属所引起的非致癌和致癌风险。结果与蔬菜地比较,水田土壤中As、Pb和Hg的含量均较高,差异有统计学意义(P3、的风险贡献率分别为73.0%和85.7%;经手一口直接摄人是研究区儿童土壤暴露风险的最主要途径。结论该村土壤主要受到了As、cd和Pb的污染;土壤中重金属对儿童的总健康风险小于USEPA推荐的最大可接受风险水平(1.0xl0W年),不会对当地儿童健康造成明显的损伤。关键词:土壤;金属,重;健康风险中图分类号:Rl81.3文献标志码:A文章编号:1001—5914(2014)06—0512—05Contaminationofheavymetalsinsoilsandhealthriskassessmentinchildreninadownstreamvill4、ageofDachangminingareainGuangxiZHANGLi—e,MOZhao-yu,QINJian,CHENZhi-ming,XIONGYu-xia,WEIYan-hong,ZHANGZhi-yong,Z0UYun-feng*SchoolofPublicHealth.GuangxiMedicalUniversity,Nanning.Guangxi530021.inaCorrespondingauthor:ZOUYun,E—mail:email__zyf@163.cornAbstract:Oblii.iectiveToevaluatethe5、potentiahealthriskstochildrencausedbyheavymetalsnsoilsnadownstreamvillageinDachangminingareaofGuangxi.MethodsThefarmlandsoilsamples(paddysoilandvegetablegardensoil)fromadownstreamvillageinDachangminingareawerecollectedinJuly2013andthecontentsofarsenic(As),lcad(Pb),cadmiumfCd).chro6、miunfCr)andmercuryfHg)weredetermined.HealthriskassessmentmodelrecommendedbyUSEPAwasusedtoevaluatethenon—carcinogenicriskandcarcinogenicriskforchildrenaged1—6yearsexposusedtoheavymetalsbymultipleexposurepathways.ResultsThecontentsofAs.PbandHginpaddysoils.weresignificantlyhighercomp7、aredwiththoseinvegetablegardensoils(P<0.05)。buttherewerenosignificantchangesincontentofCdandCr.WiththeexceptionofCrthecontentsofAs.Pb,CdandHginsoilsexceededthenationalstandardlimitsinvaryingdegrees.theoverstandardrateswere94.4%(17/18),27.8%(5/18),100.O%(18/18)and5.6%(1/18),respect8、ively.Thetotalnon—carcinogenicris
3、的风险贡献率分别为73.0%和85.7%;经手一口直接摄人是研究区儿童土壤暴露风险的最主要途径。结论该村土壤主要受到了As、cd和Pb的污染;土壤中重金属对儿童的总健康风险小于USEPA推荐的最大可接受风险水平(1.0xl0W年),不会对当地儿童健康造成明显的损伤。关键词:土壤;金属,重;健康风险中图分类号:Rl81.3文献标志码:A文章编号:1001—5914(2014)06—0512—05Contaminationofheavymetalsinsoilsandhealthriskassessmentinchildreninadownstreamvill
4、ageofDachangminingareainGuangxiZHANGLi—e,MOZhao-yu,QINJian,CHENZhi-ming,XIONGYu-xia,WEIYan-hong,ZHANGZhi-yong,Z0UYun-feng*SchoolofPublicHealth.GuangxiMedicalUniversity,Nanning.Guangxi530021.inaCorrespondingauthor:ZOUYun,E—mail:email__zyf@163.cornAbstract:Oblii.iectiveToevaluatethe
5、potentiahealthriskstochildrencausedbyheavymetalsnsoilsnadownstreamvillageinDachangminingareaofGuangxi.MethodsThefarmlandsoilsamples(paddysoilandvegetablegardensoil)fromadownstreamvillageinDachangminingareawerecollectedinJuly2013andthecontentsofarsenic(As),lcad(Pb),cadmiumfCd).chro
6、miunfCr)andmercuryfHg)weredetermined.HealthriskassessmentmodelrecommendedbyUSEPAwasusedtoevaluatethenon—carcinogenicriskandcarcinogenicriskforchildrenaged1—6yearsexposusedtoheavymetalsbymultipleexposurepathways.ResultsThecontentsofAs.PbandHginpaddysoils.weresignificantlyhighercomp
7、aredwiththoseinvegetablegardensoils(P<0.05)。buttherewerenosignificantchangesincontentofCdandCr.WiththeexceptionofCrthecontentsofAs.Pb,CdandHginsoilsexceededthenationalstandardlimitsinvaryingdegrees.theoverstandardrateswere94.4%(17/18),27.8%(5/18),100.O%(18/18)and5.6%(1/18),respect
8、ively.Thetotalnon—carcinogenicris
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