烧碱行业无机化工废渣污染特征与污染风险控制研究

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1、北京化工火学硕．：土：．研究生论文saultmud，wastesulfuricacidandmirabilite．Bythisprocess，whenpertonofcausticsodaproduced，theconsumptionofrawsaltwas1462．5kg，andthegenerationofsaltmudwas93．3kg，wastesulfuricacidWasabout26．1kg，mirabilitewasabout25．5kg．Bytheresultsoftheexperimentanalysi

2、s，wecanfindthatthemajorcomponentofsaltmudwereCaC0340％97％，NaCl3％～l6％，Si027％--q0％，anditcanalsofindBaS0430％useddenitrationtechnologies．Thecontentsofchromium，zinc，barium,mercury,copper,cadmium，leadandsomeotherheavymetalsdoesnotexceedthestandardof"soilenvironmentalqual

3、itystandards”．ThepHofsaltmudwasbetween1tO12．Theleachingtoxicityoftheaboveheavymetalswerelowerthanhazardouswasteidentificationstandard，SOsaltmuddoesnothavethecharacteristicsofhazardouswaste．Theexperimentalanalysisfoundthemaintypeofwasteseparatorsampleswerechrysotil

4、ewhichWasakindhazardouswaste．Theconcentrationofwastesulfuricacidwasabout75％，itdidnotcontainheavymetals，butthecontentofchloridewasaboutO．04％．SeventypercentcompositionofmirabiliteisNa2S04，followedbyNaCl，wherethecontentofmainheavymetalshadalmostnoexcessivephenomenonc

5、omparedto¨soilenvironmentalqualitystandards¨．Thesolidresidueofheavymetalscausedbydissipationandleachingwillharmtheenvironmentandhumanhealth．theresearchselectedRBCAmodeltodoriskcharacterizationandthengottheriskofsaltmudstockpilingacceptable．Thewayofsaltmudrecycling

6、isstillontrial，suchasmakingconstructionIVABSTRACTmaterialsanddesulfurizert，therearemanyproblemsintheseways，SOitisdifficulttopromoteintheenterprise．Sothemaintreatmentofthewasteislandfillnearbythecausticsodaindustrycurrently．Firstofall，thesaltmudcontrolshouldactivel

7、ypursuereductionmeasurestOreduceitsproductioncapacity,thentakemoreresearchesonitsrecyclingtechnology,andpromotetherelevantdemonstrationprojectsactively．Membranewastecontainshazardouswaste，theyaredepthlandfillbycementsolidificationcurrently．Asthediaphragmcausticsod

8、aproductioncapacitydeviceshavebeeneliminated，diaphragmwastewillbecompletelyresolvedthen．Thewastesulfuricacidisabsenceofimpurities，itsrecyclingandreuseis