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1、第28卷第3期四川农业大学学报Vol.28No.32010年9月JournalofSichuanAgriculturalUniversitySep.2010典型地震灾区农业土壤重金属分布特征与评价11112张毅,蔡艳,张世熔,李婷,黄爱萍(1.四川农业大学资源环境学院,四川雅安625014;2.中国银行成都开发西区支行,成都610036)摘要:在典型地震灾区彭州市通济镇新黄村选取29个农业土壤样品,其中水田土壤分层采样,研究土壤Cd、Cu、Pb、Zn空间分布特征和污染程度。结果表明:该
2、村土壤重金属含量不等,由高到低依次为Zn、Cu、Pb、Cd。区域内耕地土壤平均重金属含量高于非耕地,安置点土壤重金属平均含量高于非安置点。水田土壤重金属含量随着土层深度增加,含量逐渐减少。在同一土层,安置点土壤重金属含量高于自然水田。土壤Cd为重污染,Cu为轻污染,Zn预警,未受Pb污染,其综合污染指数为Cd>Cu>Zn>Pb。3448%样点受污染,绝大多数为冲积平原与丘陵交界处安置点水田土壤。关键词:地震灾区;重金属;土壤污染;分布;污染评价;污染指数中图分类号:P315.9;X131文献标识码:A文
3、章编号:1000-2650(2010)03-0339-06DistributionandEvaluationofHeavyMetalsofAgriculturalSoilinTypicalEarthquakeDisasterArea11112ZHANGYi,CAIYan,ZHANGShirong,LITing,HUANGAiping(1.CollegeofResourceandEnvironment,SichuanAgriculturalUniversity,Yaan625014,Sichuan,China;
4、2.ChengduDevelopmentWestZoneSUBBranch,BankofChina,Chengdu610036,China)Abstract:Xinhuangvillage,Pengzhoucityisatypical512!earthquakedisasterarea,fromwhichtwentyninesoilsampleswerechosen.Amongthese,soilprofileofpaddyfieldwassampledaccordingtosoillayers.Thes
5、tudywasmademainlyonspacedistributionandpollutionevaluationofCd,Cu,Pb,Zn.Thecontentofheavymetalsinthesoilsamplesofthisvillagewasdifferent,withtheorderbeingZn>Cu>Pb>Cd.Averagecontentofheavymetalsofthefarmingsoilwashigherthanthatofthenonfarming,andaveragecont
6、entofheavymetalsofthesoilundersettlementspotwashigherthanthatofthenonsettlementspot.Heavymetalscontentofthepaddyfieldsoilreducedgraduallyalongwiththesoillayerdeepening,andheavymetalcontentofthesoilundersettlementspotwashigherthanthatofthenaturalpaddyfieldin
7、theidenticalsoillayer.SoilCdwastheheavypollution,Cuwasthelightpollution,Znwastheearlywarning,andPbwasnotpolluted.SequenceofsoilcomprehensivepollutionindexwasCd>Cu>Zn>Pb.3448%ofsampleswerepolluted,mostofwhichweresampledfrompaddyfieldundersettlementspot.Keywo
8、rds:earthquakedisasterarea;heavymetal;soilpollution;distribution;pollutionevaluation;pollutionindex2008年5月12日,四川汶川发生80级特大污水侵入,土壤生产力下降等问题,对灾后当地人民地震,受灾地区涉及四川、甘肃、陕西、重庆、云南等生产和生活产生巨大影响。本文以
