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,,,,(,100101):,BCR2,.,,2,,:(85177%)2(12144%)Fe2Mn(0193%)(0186%);,,pH;,,,..:;;BCR;;:X53;X13113:A:025023301(2007)0320654205:2006203223;:2006205208:(40571008);(KZCX32SW2437):(1971),,,,,E2mail:yhli@igsnrr.ac.cnChemicalSpeciationandPollutionCharacteristicsofSoilMercuryinMercuryDepositAreaofWesternHunan2EasternGuizhouProvinceLIYong2hua,YANGLin2sheng,LIHai2rong,WANGWu2yi,TANGDeng2yin(InstituteofGeographicalSciencesandNaturalResourcesResearch,ChineseAcademyofSciences,Beijing100101,China)Abstract:BytheBCRextractionproceduresandHG2ICP2AEStechnique,thechemicalspeciationandpollutioncharacteristicsofsoilmercuryintypicalmercurydepositareasofWesternHunan2EasternGuizhouprovincewerestudied.Itwasfoundthattheconcentrationsofmercuryinsoilsaredominatedbyresidualform,followedbyorganic2sulfideform.Fe2Mnoxidesandacid2exchangeableformareratherlow.Thepercentofthefourmercuryspeciesinsoilsare85177%,12144%,0193%and0186%,respectively.Thetotalconcentrationsandeachspeciesofmercuryinsoilsshowpositiverelationshipwiththeconcentrationofsands,andnegativerelationshipwiththeconcentrationofclaysinsoils.TheyalsoincreasewiththesoilpHvalue.Mercuryconcentrationinsoilshasspatialchanges.Ingeneral,theconcentrationsinthesurfacesoilarehigherthanthoseofsub2surfacesoils.Furthermore,theconcentrationsrapidlydecreasewiththedistancefromthepollutionsourceincreasedandvaryamongdifferentsoilsamplesfromdifferentlocationandlandusetype.Theresultsindicatedthatexogenousmercurypollutioncausedbyhumanactivitiesprovidessignificantinfluenceonenvironmentaltoxicityandpollutioncharacteristicsofmercuryinsoilsofmercurydepositarea.Keywords:mercury;speciation;BCRextractionprocedures;soil;WesternHunan2EasternGuizhouProvince,[1,2].72,50%[1].,,[35].,[6].,,.,[79].,BCR,Fe2Mn24[10].,BCR,ICP[11,12].BCR2(HG2ICP2AES),,,.28320073ENVIRONMENTALSCIENCEVol.28,No.3Mar.,20071111,.,,;20,,.112,,,,020cm;,100g,100,.BCRFe2Mn24,(HG2ICP2AES)[13],(GBW07401).[14],:,:(),pH:(1215).2211BCR,HG2ICP2AES,(1).,,Hg,.Hg().,85177%,2(12144%),Fe2Mn,1%.,64134%,Fe2Mn210177%6161%18128%.,Fe2Mn(p0105).:2Fe2Mn();2Fe2Mn().BCR11)Table1Hgconcentrationst2testbetweentwolocationsandtwolandtypes2)3)Pgg-10106801038010540100901062010290107401046P%0186a10177b1188c0111dFe2MnPgg-10111801132010350101201119011100111901158Fe2MnP%0193a6161b1174c0110d2Pgg-141867511060110301036210792117271256518252P%12144a18128a18114c7156dPgg-19014013619701383011857106071204161183156177P%85177a64134b78125c92123d1)13794;2)=0105,a,a;a,b;3)=0105,c,c;c,d,,,;Fe2Mn,;2Hg2+,,,Fe2Mn2;,,.,(),,Fe2Mn279%30%2%.,5563::;,,.,.1,Fe2Mn2,1121103152219.2(p0105),(92123%),2(7156%),Fe2Mn011%.,78125%,218114%,Fe2Mn2%.212,,.1,,.1,(A)(B).S121,(C)2,;S2212,2.,2222.,1Fig.1VerticaldistributionofeachHgspeciesintypicalsoilprofilesinHgdepositareas,3S122S123S124,S122S123S12450m100m300m.32.,,.,,[15],,[3].,Hg.Hg,,.,.213656282Fig.2HorizontaldistributionofeachHgspeciesinpaddysoilsinHgdepositareaspH2.2:,,pH;2,;,.,;2,;Fe2Mn,;pH,pH(pH51157180),pH,.,Hg2Table2CorrelationcoefficientsbetweentheconcentrationsofeachHgspeciesandsomesoilparametersinsoilsofHgdepositareaspHFe2Mn20147-018933-0182330165330141-016433pH0170330132-01623301593016130110-0145014101563Fe2Mn0142-0102-0129-01150138012220182330139-017333014701633015830164301873301573-0185330159301633015001500183330183330137-01733301513015330151015101853311003333(p0101);3(p0105).:pH16(r=0148,p0105;r=0161,p0101);13(r=0153,p0105;r=0166,p0101),[16].,Hg,,Hg.,,Hg,HgPHg[3].,,,Hg.,,.,,[16,17].,,.,.,Hg2+Hg0,Hg0.,[16].,,,.,,,2.3(1),7563:2,Fe2Mn,:(85177%)2(12144%)Fe2Mn(0193%)(0186%).,,.(2),,,.(3),,,pH;.:[1],,.[J].,1999,2:512.[2],,.Au,Sb,Hg[J].(),1995,31(4):678684.[3],,,.[J].,2005,26(5):187191.[4],,,.[J].,2004,25(2):111114.[5],,,.[J].,2004,25(4):149154.[6],,,.[J].,2004,23(6):3340.[7]TessierA,CampbellPGC,BissonM.Sequentialextractionprocedureforthespeciationofparticulatetracemetals[J].AnalyticalChemistry,1979,51(7):844851.[8]DasAK,ChakrabortyR,CerveraML,etal.Metalspeciationinsolidmatrices[J].Talanta,1995,42(8):10071030.[9]GleyzesC,TellierS,AstrucM.Fractionationstudiesoftraceelementsincontaminatedsoilsandsediments:areviewofsequentialextractionprocedures[J].TrendsinAnalyticalChemistry,2002,21(6P7):451468.[10]RauretG,Lpez2SnchezJF,SahuquilloA,etal.ImprovementoftheBCRthreestepsequentialextractionprocedurepriortothecertificationofnewsedimentandsoilreferencematerials[J].J.Environ.Monit.,1999,1:5761.[11]HoMD,EvansGJ.Sequentialextractionofmetalcontaminationsoilswithradiochemicalassessmentofreadsorptioneffects[J].EnvironmentalScienceandTechnology,2000,34:10301035.[12],,.[J].,2002,21(5):430435.[13].HG2ICP2AES[A].:.[C].:,2002.153154.[14].[M].:,1978.[15],,.[J].,2001,38(2):248255.[16]H,.[J].,1983,11(3):1724.[17],,.Pb[J].,2002,22(2):156160.85628