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(DOC) Environmental_2

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Environmental_2

    Environmental

36CHINESEJOURNALOFGEOCHEMISTRVo1.25(Supp1.)2006

    ;insoilsandplants.ItcouldbeconcludedthatAsandSbcontaminationoccurspredominantlyinwaterandsediment,whereasAsand

    ;Sbenrichmentinsoilsandplantsisofnosignificance.

    ;Keywordsarsenic;antimony;mineenvironment;heavymetals;contamination

    ;EnvironmentalimpactsoftheabandonedmercurymineinPodljubelj,Slovenia

    ;TamaraTersic,MatejaGosar,RobertSajn

    ;GeologicalSurveyofSlovenia

    ;ThePodljubeljmercurymineliesintheNWpartofSlovenia.Theoreisofhydrothermalveintype.Theoredepositwasexploited

    ;betweentheyears1557and1902.Totalproductionoftheminewasl10000tonsofore(360tonsofHg).Asmelterlocatedcloseto

    ;theminehadbeeninoperationsince1855.Thewastematerialfromthemineandthesmelterwasdumpedinclosevicinityofthe

    ;mine.T0ta1quantityofthewastehasbeenestimatedat170000tons.Inordertoestablishenvironmentalimpacts.soilandstream

    ;sedimentsampleswereinvestigated.Soilsampleswerecollectedattwodiffer

entdepths(horizonsAandB1ina100mgridwithinan

    ;88haarea.Inthevastareaalsol1samplesofstreamsedimentswereconsidered.Heavymetalsweredeterminedbymeansofcold

    ;vaporatomicabsorptionspectrometryCV-AASafteraquaregiadigestion.Basedonthechemicalanalysesofsamples,theestimated

    ;mercurymeanforsoilsis3.67mg/kg(O.35-244mg/kg)forhorizonAand1.39mg/kg(0.1771.7mg/kg)forhorizonB.The

    ;estimatedmercurymeanforstreamsedimentsis0.64mgCkgfO.0651.36m

    gCkg).Theconcentrationsofmercuryinsoilsgenerally

    ;decreasewithdepthanddistancefromthemine.ThehighestcontentofHgwasdeterminedinasampletakenintheimmediate

    ;vicinityofthesmelter(719mg/kg).Theresultshaveshownthatonthe9ha0fthestudyarea.thecontentsofHginsoilsexceeded

    ;theofficiallysetlimitvalueforsoils(10mg/kg).HighcontentsofHginsoilaroundtheabandonedsmelterareaconsequenceof

    ;formeratmosphericemissionsandtechnologicallosses.HighcontentsofHgwerealsofoundinthemineandsmelterwastedump.At

    ;theedgesofthestudyareaandinthesamplesofstreamsediments,Hgconcentrationsarelow.Astronggeogenicimpactcouldnotbe

    ;determinedinanyofthesamplinglocations.TheimpactofminingandprocessingofHgontheenvironmentisspatiallylimited.The

    ;contentsofHgareveryhighintheclosevicinityofthemineanddecreasewithdi

stancefromthesourceofpollution.Thewiderarea

    ;0fthemineisnothighlypopulated.thereforethehighcontentsofHgarenotcritica1.

    ;AnomalouscriticalvaluesofHgareapotential

    ;threatonlytothosepeoplewholiveinthenearvicinityoftheabandonedsmelter. ;Keywordsmercurymine;geochemistry;environmentalimpact;soil,sediment;heavymetal

    ;EnvironmentalgeologyproblemscausedbyminingactivitiesinPanzhihuaironmine

    ;ZhengqiXU,XianguoTUO,ChengjiangZHANG,KeliangMU

    ;TheCollegeofAppliedNuclearTechn.logyandA”tomationEngineering,ChengduUniversityofTech”.logy,Chengdu610059,Chind

    ;CollegeofinformationEngineering,ChengduUniversityofTechnology,Chengdu610059,Chi”d

    ;ThePanzhihuaironmine,afamousV_Timagnetitemineinourcountry, ;iscomposedoftheJianshan.Lanjiahuoshanand

    ;Zhujiabaobaooreareas.IthascausedmanyecologicalproblemsinthePanzhihuaironmineafternearly40yearsofmining.which

    ;hassevereimpactonsafeminingandhasbroughthugeeconomiclosses.Thispaperbeginswiththeenvironmentalgeological

    ;problemscausedbyunloading(mining)andloading(minedump)thatisthenresultedfromminingactivities.Thepaperthen

    ;analysesandstudiesthecauseanddevelopmentofeveryenvironmentalgeologicalproblemaswel1astheformationofgeological

    ;disasters(1andslip,coastandlandslide)fromtwoaspects:geologicaldisastersandenvironmenta1geologicalproblemscausedby

    ;miningactivities.Meanwhile,thePaperputsforwardsuggestionsaboutpreventionandmanagementofmine.Itisfoundthatmaterial

    ;unloadinginthePanzhihuaironminehasmadetheoriginallystablegeologicalbodybelessstable,andhasformedmuchdisastrous

    ;slope.Theresultedgeologicaldisastersincludelandslip,landslip,etc.Materialloading,i.e.minedump,hascausedahugeartificial

    ;loosestackpiledupinvalleys.Thesteepslopescaneasilyresultingeologicaldisasters,suchaslandslip,landslide,debrisflow,etc.

    ;I1Unow,therehavebeenover10timesgeologicaldisasterscausedbymatedalunloading.andover20timescausedbymateria1

    ;loading.Theeconomic1OSShasbeenover0.1billionyuanRMB.

    ;Itisalsofoundthatthemajorimpactofminingonenvironmentis

    ;thepollutionofsoilandwatercausedbyheavymetals.Besidesthis.powderisalsoanothersourceofpollution.Whatcanbegot

    ;fromthispaperare”(1)geologicaldisastersarecontrolledbybasicgeologicalfactors,suchasfault,joint,sheetrock,softyrock,etc.;

    ;andcausedbyblastingshock,outsideforcevibration,mining,minedump,etc.inmining;(2)environmentalpollutionismainly

    ;causedbyheavymetalsthatenterintosoilandwaterbywastewater,dustandbarrenrock.

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