资源描述：
《常用化肥重金属元素含量分析评价及其对土壤环境的影响》由会员上传分享，免费在线阅读，更多相关内容在工程资料-天天文库。
1、常用化肥重金属元素含量分析评价及其对土壤环境的影响摘要：随着化肥的长期施用，其中的重金属元素可能会积累，从而导致农田土壤及农作物中重金属元素超标，造成环境污染，其中，Cd，Hg，As,Pb，Cr是化肥对土壤产生污染的主要物质。以天津市蓟州区为例，采集20个常用化肥样品进行重金属元素分析评价，并研究其对土壤环境的影响。结果表明，磷酸二按肥料中As，Cd，Cr含量较其他肥料显著偏高，尿素、板栗专用肥中As，Cd，Pb含量较其他肥料显著偏低，复合肥（掺混肥）中As，Cd，Pb，Cr，Hg含量平均为11.06,0.240,2.95，19.7,0.054mg?kg-l；蓟州地区肥料样品中A
2、s，Cd，Pb，Cr，Hg含量均远远低于《肥料中砷、镉、铅、铬、汞生态指标》（GB/T23349—2009）国家标准中的限值，样品合格率为100%。每年通过化肥可以向每公顷农田土壤中平均输入As，Cd，Pb，Cr，Hg的质量分别约为13.275，0.315,3.690,33.030,0.076kg。磷酸二铵和尿素呈碱性，复合肥（掺混肥）均呈酸性，长期大量施用化肥可能会使农田土壤的pH值整体下降。境中图分类号：S143；X53文献标识码：ADOI编码:10.3969/j.issn.1006-6500.2017.04.005AnalysisandEvaluationofHeavyMe
3、talElementsinCommonFertilizersandTheirEffectsonSoilEnvironmentWANGWeixing,CAOShuping,LIGongke，ZHANGYana(TianjinInstituteofGeologicalSurvey，Tianjin300191，China)Abstract：Withthelong-termapplicationoffertilizer,theheavymetalelementsinthesoilandcropscanleadtoexcessiveheavymetalelements,resultingi
4、nenvironmentalpollution.Cd,Hg，As，Pb，Crarethemainchemicalfertilizersforthepollutionofthesoil.Inthisstudy，takingJizhoudistrictofTianjincityasanexample，20commonfertilizersampleswereanalyzedtoevaluateheavymetalelements,andstudiedtheireffectsonsoilenvironment.TheresultsshowedthatAs，Cd,Crcontentsof
5、diammoniumphosphatefertilizerweresignificantlyhigherthanotherfertilizers.As，Cd,Pbcontentinureaandspecialfertilizerforchestnutweresignificantlylowercomparedwithotherfertilizer.As,Cd,Pb,Cr，Hgcontentsincompoundfertilizer(fertilizerblending)were11.06，0.240，2.95,19.7,0.054mg?kg-l，respectively.As,C
6、d,Pb,Cr，HgcontentsinJizhoufertilizersampleswerefarlowerthanthenationalstandardlimitvalueof《As，Cd,Pb,Cr，Hgecologicalindexsinfertilizer》(GB/T23349-2009)，andsamplespassrateswere100%.AverageinputqualitiesofCd，Pb，AsCr，Hgthroughfertilizertothefarmlandsoilperacreeachyearwere13.275，0.315，3.690，33.030
7、，0.076kg,respectively.DAPandureawerealkaline,andcompoundfertilizer(mixedfertilizer)wereacidic.Long-termuseofchemicalfertilizersmaymakethesoilpHoveralldecline.Keywords：chemicalfertilizer；heavymetalelements；analysisandevaluation；soilenvironment
