简介：TotalconcentrationsofZninthesedimentsoftheoffshoreandintertidalareasofthewestcoastofPeninsularMalaysiawererecentlyreportedintheliteraturs.However,totalconcentrationsofmetalsinthesedimentsamplesdonotreflecttheportionorcarrierphasewhichisattributabletoanthropogenicactivitiesandthoseofnaturalorigins.Inthiswork,geochemicalfractionofZninthesedimentsofthesameareaswasstudiedandthepotentialuseofCVasanindicatorofZnpollutionwasdetermined.Thegeochemicalstudybyusingsequentialextractiontechniquerevealedtions,respectively,inthesedimentswhilemostofthetotalzincconcentrations(offshore:70%;intertidal:52%)foundinthesedimentscouldbemostlyduetonaturalorigins(nonresistantfraction).Thus,theZnlevelsintheStraitsofMalaccashouldnotposearisktotheliyingorganisms.BasedonSpearman'scorrelationcoefficients,thesourceofZncontaminationintheStraitsofMalaccawasmainlycontributedbytheintertidalcoastalarearatherthanoffshorearea.ThepresentstudyalsoindicatedthecoefficientofvariationcanbeusedasapotentialindicatoroftotalsummationofgeochemicalZnconcentrationsinthecoastalsedimentbutofdifferentgeochemicalofZnneedsfurthervalidation.

简介：KelanaJayaMunicipalParkisapopularrecreationparkinPetalingJaya.Thefivelakes,locatedwithinthePark,wereex-miningponds,functioningasfloodretentionpondsandreceivingeffluentsfromnearbyhumanactivitiesmainlyfromresidentsandtransportation.Astudywasconductedtodeterminethedistributionandsourcesofheavymetals(Cd,CuandZn)inthesedimentsofKelanaJayaLakes.ConcentrationsofCd,Cu,andZnforsurfacesedimentweredeterminedbyusingaqua-regiamethodandsequentialextractiontechnique.TotalCdconcentrationsrangedfrom0.48μg/gto2.68μg/gdryweight(dw)foralllakes.TotalCdconcentrationsinsedimentofalllakesexceededCCME(CanadianCouncilofMinistersoftheEnvironment,2001)guidelines.TotalCuconcentrationsrangedfrom7.37μg/gto73.6μg/g(dw).OnlyCuconcentrationinonelakeexceededtheCCMEguidelinesbesideshavingthehighestmeanconcentrationamongall.TotalZnconcentrationsrangedfrom107μg/gto529μg/g(dw).Again,TheZnconcentrationsinthreelakeswerefoundtoexceedCCMEguidelinesforZnconcentrationinfreshwatersediment.GeochemicalstudyonsedimentrevealedthatnonresistantfractionsforCd,CuandZnforotherlakesthereCuandZnindicatedthatlakesinthepark,especiallynearoxidationpondandmonsoondrains,couldhavereceivedanthropogenicmetalsfromdomesticwastes.RehabilitationprogramandregularbiomonitoringatKelanaJayaLakesarethereforerecommended.