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1、doi:10.3969/j.issn.1007-7545.2019.07.017某镍钼矿区周边土壤重金属风险评价及种植蔬菜健康风险评估武晶芳,江帆,韦唯,周世会,黄先飞(贵州师范大学贵州省山地环境信息系统与生态环境保护重点实验室,贵阳550001)摘要:为调查某镍钼矿区周边土壤重金属(Cd、Pb、Zn、Cu、Ni及Cr)污染情况和周边蔬菜及水稻中重金属含量对居民的影响,在矿区周边采集土壤样品,并采集其周边土壤根际的蔬菜或水稻样品。对土壤中重金属污染潜在生态风险进行评价,利用健康风险评估法对各种蔬菜或
2、水稻判别重金属对人体健康影响程度,并采用生物富集系数法对各种蔬菜或水稻对重金属元素富集情况进行调查。结果显示,与贵州省土壤背景值相比,各个取样点重金属含量均存在超标现象,其中以Ni超标最严重。潜在生态危害趋势为Eri(Cd)>Eri(Ni)>Eri(Cu)>Eri(Pb)>Eri(Zn)>Eri(Cr),17号样点污染最严重,达到强生态危害级别。未发现可对Cd、Cr、Cu、Ni、Pb及Zn有富集能力的蔬菜及水稻,但发现辣椒和萝卜对Cd有较强吸收,水稻、萝卜及玉米对Zn具有较强吸收。结合重金属总量分析
3、及潜在生态风险评价,研究区应注意Ni及Cd污染治理与防治,还应注意Cr及Pb造成的健康风险。关键词:重金属;蔬菜;潜在生态风险评价;健康风险评估法;生物富集系数法中图分类号:X53文献标志码:A文章编号:1007-7545(2019)07-0000-00RiskAssessmentofHeavyMetalsinSoilandHealthRiskAssessmentofVegetableGrowingaroundNickel-MolybdenumMineAreaWUJing-fang,JIANGFan
4、,WEIWei,ZHOUShi-hui,HUANGXian-fei(GuizhouProvincialKeyLaboratoryforInformationSystemofMountainousAreasandProtectionofEcologicalEnvironment,GuizhouNormalUniversity,Guiyang550001,China)Abstract:SoilsamplesandvegetablesorricesamplesaroundaNi-Mominingareaw
5、ererandomlycollectedtoinvestigatecontaminationofheavymetals(Cd,Pb,Zn,Cu,NiandCr)insoilandinfluenceofheavymetalscontentinvegetablesandriceonresidents.Heavymetalpollutioninsoilwasevaluatedbypotentialecologicalriskassessment.Healthriskassessmentofvariousv
6、egetablesorricewasusedtoidentifyimpactofheavymetalsonhumanhealth.AccumulationofheavymetalsinvariousvegetablesorricewasinvestigatedbyBioconcentrationCoefficientMethod.TheresultsshowthatcomparedwithbackgroundvaluesofsoilinGuizhouProvince,contentsofheavym
7、etalsineachsamplepointexceedthestandard,ofwhichNiexceedsthestandardtothelargestextend.TrendofpotentialecologicalhazardsisEri(Cd)>Eri(Ni)>Eri(Cu)>Eri(Pb)>Eri(Zn)>Eri(Cr).Thepollutionofsample17isthemostserious,reachingthelevelofstrongecologicalhazards.Ve
8、getablesandricewhichcouldenrichCd,Cr,Cu,Ni,PbandZnarenotfound,butchiliandradishhavestrongabsorptiononCd,whilerice,radishandmaizehavestrongabsorptiononZn.Combinedwithtotalamountanalysisofheavymetalsandpotentialecologicalriskassessment,at