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Partition Coefficients for Metals in Surface Water, Soil and Waste

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This research provides data, modeling, tools, and technical support to EPA Program and Regional Offices, state and local governments, and other customers, enabling achievement of Agency and ORD strategic goals for the protection of human health and the environment.
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  EPA/600/R-05/074July2005 PARTITIONCOEFFICIENTSFOR METALS INSURFACEWATER,SOIL,ANDWASTE  byJerryD.Allison, 1,2 TerryL.Allison,. 2 1 HydroGeoLogic,Inc 1155HerndonParkway,Suite900 Herndon,VA20170 2 AllisonGeoscienceConsultants,Inc. 3920PerryLane FloweryBranch,GA30542 WorkAssignmentManager: RobertB.Ambrose,Jr.,P.E.ContractNo.68-C6-0020 EcosystemsResearchDivision NationalExposureResearchLaboratory960CollegeStationRoadAthens,GA30605U.S.EnvironmentalProtectionAgencyOfficeofResearchandDevelopmentWashington,DC20460   NOTICETheinformationinthisdocumenthasbeenfundedwhollybytheUnitedStatesEnvironmentalProtectionAgencyundercontract68-C6-0020,WorkAssignment2-01toHydroGeoLogic,Inc.IthasbeensubjecttotheAgency'speerandadministrativereview,andithasbeenapprovedforpublicationasanEPAdocument.Mentionoftradenamesofcommercial productsdoesnotconstituteendorsementorrecommendationforuse.ii  FOREWORDTheNationalExposureResearchLaboratoryEcosystemsResearchDivision(ERD)inAthens,Georgia,conductsprocess,modeling,andfieldresearchtoassesstheexposurerisksofhumansandecosystemstobothchemicalandnon-chemicalstressors.Thisresearchprovidesdata,modeling,tools,andtechnicalsupporttoEPAProgramandRegionalOffices,stateandlocalgovernments,andothercustomers,enablingachievementofAgencyandORDstrategicgoalsfortheprotectionofhumanhealthandtheenvironment.ERDresearchincludesstudiesofthebehaviorofcontaminants,nutrients,andbiotainenvironmentalsystems,andthedevelopmentofmathematicalmodelstoassesstheresponseofaquaticsystems,watersheds,andlandscapestostressesfromnaturalandanthropogenicsources.ERDfieldandlaboratorystudiessupportprocessresearch,modeldevelopment,testingandvalidation,andthecharacterizationofvariabilityandpredictionuncertainty.Leading-edgecomputationaltechnologiesaredevelopedtointegratecorescienceresearchresultsintomulti-media(air,surfacewater,groundwater,soil,sediment,biota),multi-stressor,andmulti-scale(organism,population,community,ecosystem;fieldsite,watershed,regional,national,global)modelingsystemsthatprovidepredictivecapabilitiesforcomplexenvironmentalexposurescenariosfacebytheAgency.ExposuremodelsaredistributedandsupportedviatheEPACenterforExposureAssessmentModeling(CEAM)(www.epa.gov/athens/ceampubl),theWatershedandWaterQualityModelTechnicalSupportCenter(www.epa.gov/athens/wwqtsc),andthroughaccesstoInternettools(www.epa.gov/athens/onsite).ThisresearchprojectisacomponentoftheERDhazardouswasteresearchprogram,whichseekstobetterunderstandtheenvironmentalcycling,exposure,andriskarisingfromthereleaseoforganicandinorganicpollutantsfromtreatmentfacilities.Inthisproject,metal partitioncoefficientsweredevelopedforthewatershed,surfacewater,andsourcemodelsusedintheMultimedia,Multi-pathway,Multi-receptorExposureandRiskAssessment(3MRA)technology.Knowledgeanddatagainedinthisevaluationwillbeusedtoimproveexposureandriskanalysiscapabilitiesforheavymetalsevaluatedbythe3MRAandothermodelsused byEPAinvariousregulatoryprograms.EricJ.Weber,Ph.D.,ActingDirectorEcosystemsResearchDivisionAthens,Georgiaiii  ABSTRACTThisreportpresentsmetalpartitioncoefficientsforthesurfacewaterpathwayandforthesourcemodelusedintheMultimedia,Multi-pathway,Multi-receptorExposureandRiskAssessment(3MRA)technologyunderdevelopmentbytheU.S.EnvironmentalProtectionAgency.Partitioncoefficientsvaluesarepresentedforpartitioningbetweensoilandwater; partitioningbetweenthesuspendedsedimentloadandthewaterinstreams,rivers,andlakes; partitioningbetweenriverineorlacustrinesedimentanditsporewater;andpartitioningbetweendissolvedorganiccarbon(DOC)andtheinorganicsolutionspeciesinthewaterofstreams,rivers,andlakes.Somepartitioncoefficientsarealsopresentedtorepresentmetalpartitioning betweenthesolidphaseofwasteanditsassociatedleachate.Partitioncoefficientsare presentedforantimony(Sb),arsenic(As),barium(Ba),beryllium(Be),cadmium(Cd),chromium(Cr),cobalt(Co),copper(Cu),lead(Pb),molybdenum(Mo),mercury(Hg),methylatedmercury(CH 3 Hg),nickel(Ni),selenium(Se),silver(Ag),thallium(Tl),tin(Sn),vanadium(V),andzinc(Zn).Atwo-phaseapproachwasusedindevelopingtheneededpartitioncoefficients.Inthefirst-phase,aliteraturesurveywasperformedtodeterminetherangeandstatisticaldistributionofvaluesthathavebeenobservedinfieldstudies.Thisincludedthecollectionofpublished partitioncoefficientsforanyofthemetalsinanyoftheenvironmentalmediaofinterest,orourestimationofpartitioncoefficientsfromreportedmetalconcentrationdatawhenfeasible.Inthesecond-phaseeffort,statisticalmethods,geochemicalspeciationmodeling,andexpert judgementwereusedtoprovidereasonableestimatesofthosepartitioncoefficientsnotobtainedfromourliteraturesearchanddataprocessing.Thereportconcludeswithadiscussionofthemanysourcesofuncertaintyinthereportedmetalpartitioncoefficients.iv

Meteoroid

Jul 23, 2017

Kerala High Court

Jul 23, 2017
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