晉南某鋼廠周邊農田土壤重金屬污染評價及源解析

經典word整理文檔，僅參考，轉Word此處可刪除頁眉頁腳。本資料屬于網絡整理，如有侵權，請聯系刪除，謝謝！晉南某鋼廠周邊農田土壤重金屬污染評價及源解析：摘要以晉南某鋼鐵廠周邊農田土壤為研究對象，分別應用地質累計指數法和潛在生態(tài)風險指數法對表層土壤7種重金屬含量進行污染評價，結果表明，本區(qū)土壤中CdCrCuMnNiPb和Zn元素含量都Pb和Cd是主要風險因子，其他元素尚未污染土壤。利用因子分析法對本區(qū)土壤中的7種重金屬元素的來源進行解析，可將其分為“自然因子”類別元素（Ni、Mn、Cu動污染因子”類別元素(Pb、和“農業(yè)活動污染因子”類別元素(Cd、Cr)等3個類別。對鋼廠周邊土壤的進行污染評價及來源分析，可為本區(qū)土壤環(huán)境污染的預防與治理提供科學依據。：關鍵詞農田土壤；重金屬；地質累計指數；潛在生態(tài)風險；污染源SourcesandassessmentofheavymetalcontaminationinfarmlandAbstract:ThecontentsoftoxicmetalCd,Cr,Cu,Mn,Ni,PbandZnwereinvestigatedbysamplingthetopsoilfromcroplandsoutsidethesteelfactoryinsouthofShanxi.Thegeo-accumulationindex(Igeo)methodandthepotentialecologicalriskindexmethodwereusedforpollutionassessment.Theresultsshowthatthemetalsstudiedhadobviousaccumulation,PbandCdisthemajorriskfactor,andotherelementsinthesafetyclassfornow.FurtherFactorAnalysisonsourcesofheavymetalsrevealedthatNi、MnandCucontaminationinthesoilswerecausedbynaturalfactors;PbandZnweremainlyoriginatedfromindustrialactivities;andagriculturalactivitieshadthelargestimpactontheaccumulationofCdandCr.Thefindingsofsourcesandtheevaluationofsurfacesoilheavymetalcontaminationcanprovideascientificbasisforpreventionandtreatmentofthesoilenvironmentpollutioninthisarea.Keywords:farmlandSoil;heavymetals;indexofgeo-accumulation;potentialecologicalrisk;pollutionsource。1,6的和。。2nk。CPjPSEjETPjpjjjpjprrjprCSjjpTjr。2表1土壤重金屬元素統計特征值Table1Descriptivestatisticsofheavymentalconcentrationsmg·kg-1差S.DSkewmg·kg-1和1和的，為當地土壤背景值的和7表2鋼鐵廠周邊農田土壤重金屬的皮爾森相關系數Table2PearsoncorrelationcoefficientofheavymetalconcentrationsincroplandaroundthefactoryZnCdCrCuMnNiPbCd1Cr0.666**0.306*-0.0470.403**-0.113-0.0231CuMnNi0.415**0.00610.593**0.742**-0.007-0.03610.590**-0.104-0.0820.491**0.0010.1821PbZn-0.1871-0.1630.487**1**表示差異達1%顯著水平,*表示差異達5%差異水平.2與與與2表3土壤重金屬污染評價地質累積指數法)Tab3Pollutionassessmentofsoilheavymetals(byIgeo)%污染指數范圍污染等級與強度污染級別0污染級別1污染級別2/mg·kg-1平均值0.24——0.16~0.291（輕）1（輕）0（無）0（無）0（無）2（中）0（無）—69.46~186.1110.76~69.99292.85~1007.610.79~45.4959.51~76.651.6~129.940.17-0.42-0.53-1.261.53—0————-0.457表313>>和和2，1和和和和表4鋼鐵廠周邊農田表層土壤重金屬元索潛在生態(tài)危害系數頻數分布Table4Frequenciesofpotentialecologicalhazardcoefficientsaboutheavymentalaroundthesteelfactorycropland潛在生態(tài)危害單項系數E＜3060≤E＜120jjjrrrj(%)(%)(%)j中度低度低度低度低度低度低度100100100100100100CuMnNi0.53~1.821.69~7.1118.83~24.240.68~1.721.043.1421.171.1PbZn——47、。由7>>>表和的和表5市郊農田土壤重金屬元素的因子分析Tab5Factoranalysisofheavymentalinsuburbcropland123123和和571，23。3[13]與與與和>>7>>)金屬的毒性系數(Zn=1，，Cr=2，，。12從112和、子232和33和73、、