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1、CanadianSoilQualityGuidelinesCADMIUMfortheProtectionofEnvironmental1999andHumanHealthhisfactsheetprovidesCanadiansoilqualityWithaboilingpointof765°C,cadmiumisunlikelyguidelinesforcadmium(Cd)fortheprotectionoftovolatilize,exceptunderextremeconditions(e.g.,Tenvironmentalandhumanhealth
2、(Table1).volcanoesandforestfires)(Eisler1985).TheelementalSupportingscientificdocumentsarealsoavailableformofcadmiumisinsolubleinwater,whereasthe(EnvironmentCanada1996;HealthCanada1996).solubilityofcadmiumsaltsvariesfrom0.00013to-1140g·100mL(Lide1992).BackgroundInformationCadmiumisr
3、ecoveredfromthefumesproducedduringtheroastingofzincoresandconcentratesandfromtheCadmium(CAS7440-43-9),asoft-white,blue-tinged,precipitatesobtainedduringthepurificationofzinclustrousmetal,seldomfoundasapuremineral,occursinsulphate(Brown1977).Globalproductionofrefined2+natureasadivale
4、ntcation(Cd).Cadmiumhasanatomiccadmiummetalfor1990wasestimatedat21800t,whichweightof112.40andavapourpressureof1.4mmHg.representsanincreaseofapproximately5%over1989-1Table1.Soilqualityguidelinesforcadmium(mg·kg).LanduseResidential/AgriculturalparklandCommercialIndustrialGuideline1.4a
5、10a,b22a22aSQGHH1.41449192LimitingpathwayforSQGHHSoilingestionSoilingestionSoilingestionOff-sitemigrationProvisionalSQGHHNCcNCcNCcNCcLimitingpathwayforprovisionalSQGHHNDNDNDNDSQGE3.8102222LimitingpathwayforSQGESoilcontactSoilcontactSoilcontactSoilcontactProvisionalSQGENCdNCdNCdNCdLi
6、mitingpathwayforprovisionalSQGENDNDNDNDInterimsoilqualitycriterion(CCME1991)352020Notes:NC=notcalculated;ND=notdetermined;SQGE=soilqualityguidelineforenvironmentalhealth;SQGHH=soilqualityguidelineforhumanhealth.aDataaresufficientandadequatetocalculateanSQGHHandanSQGE.Thereforethesoi
7、lqualityguidelineisthelowerofthetwoandrepresentsafullyintegrateddenovoguidelineforthislanduse,derivedinaccordancewiththesoilprotocol(CCME1996a).Thecorrespondinginterimsoilqualitycriterion(CCME1991)issupersededbythesoilqualityguideline.bThesoil–plant–humanpathwayisnotconsideredinthis
8、guideline.Ifproduce
