铅锌矿区农作物果实中重金属的含量及其食用安全性评价.pdf

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1、西南农业学报2012年25卷3期954SouthwestChinaJournalofAgriculturalSciencesVol.25No.3文章编号:1001－4829(2012)03－0954－04铅锌矿区农作物果实中重金属的含量及其食用安全性评价1113121吴迪，邓琴，秦樊鑫，吴坤，李存雄，罗充，孟忠常(1．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，贵州贵阳550001;2．贵州师范大学生命科学学院，贵州贵阳550001;3．贵州师范学院化学系，贵州贵阳550001)摘要:为了解贵州DY铅锌矿区农作物产品中重金属的含量及其食用安全性，从而为矿区合理种植农作物提

2、供理论依据，以DY铅锌矿区人工种植的农作物为研究对象，利用原子吸收光谱仪、原子荧光光谱仪测定其重金属的含量，采用单因子污染指数法和综合污染指数法分析农作物中重金属的污染特征及食用安全性。结果表明:萝卜的单因子污染指数最大，玉米受Zn、Cu和As污染最小;萝卜和大豆等农作物受Cd、Hg、Pb和Cr等综合污染属严重等级，萝卜的综合污染指数最大，其大小顺序为萝卜＞大豆＞甘薯＞西红柿＞红薯＞水稻＞玉米，这些农作物中重金属的含量均超出农作物中重金属的极限标准，综合污染指数均大于3，食用对人体健康有潜在危害。关键词:铅锌矿区;农作物;重金属;食用安全性评价中图分类号:S311文献标识码:AHeavy

3、MetalsContentsDetectionandFoodSecurityAssessmentforCropsProductsinLead-zincMiningAreas1113121WUDi，DENGQin，QINFan-xin，WUKun，LICun-xiong，LUOChong，MENGZhong-chang(1．GuizhouProvincialKeyLabofMountainousEnvironment，GuizhouGuiyang550001，China;2．CollegeofLifeSciences，GuizhouNormalUniversity，GuizhouGuiya

4、ng550001，China;3．DepartmentofChemistry，GuizhouNormalCollege，GuizhouGuiyang550001，China)Abstract:ThecropproductsinDYlead-zincminingareawerestudiedtounderstandtheirheavymetalcontentsandfoodsecurityandprovidetheoreticalbasisfortherationalplantingofcropsintheminingareas．Theheavymetalcontentsweredetec

5、tedthroughatomicabsorptionspectrometerandatomicFluorescenceSpectrometer．Theheavymetalspollutioncharacteristicsandfoodsecuritywereanalyzedthroughthemethodsofsingle-factorpollutionindexandintegratedpollutionindex．Theresultsshowedthat:theradisheswereseriouslypollutedwhilethecornswereslightlypolluted

6、byZn，CuandAsbysinglefactorindexmethod;radishesandsoybeanswereseverelypollutedbyCd，Hg，PbandCrbysyntheticpollutionindexmethod;thesyntheticpollutionindexofradisheswasthehighest;thesyntheticpollutionindicesofthecropswasintheorderasradish＞soybean＞potato＞tomato＞sweetpotato＞rice＞corn;thecontentofheavyme

7、talsinthecropswerehigherthanthepermissiblelimit;thesyntheticpollutionindexofthecropswasgreaterthan3，whichwaspotentiallyharmfultohumanhealth．Keywords:Lead-zincminingareas;Crops;Heavymetals;Foodsecurityassessment矿山开发引起的环