废弃革制品皮革性能及资源化利用研究

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1、leather，pigleatherandCOWleatherwas34．96％，45．47％and23．91％．PutthetestsamplesinthesolutionwhichpHvaluerespectivelywas2、4、6、7．5tocarrytheleathingexperiment．Afteracertainperiodoftime，thechromiumcontentinleachingsolutionwasdetermined．Theexperimentalresultsshowedthatunderacidicconditions，chrom

2、iumcontentinleachingliquidoffresh1eathe．blueleatherandleatherproductswere1arge．TheenvironmentaleffectevaluationshowsthatwhenindifferentpHdrenchfiltrate．thechromiumconcen仃ationinleachingliquidofthethreekindsof1eatherwereallfarexceedsthenationalclass111waterqualitystandardofsurfacewateren

3、vironmentqualitystandards．2．StudyontheadsorptionofadandonedleatherproductsonCr(III)LangmuirisothermequationCanbetterdescribethebehaviorofCr(III)onabandonedleatherproducts。Itisamonolayeradsorptionreaction。鼢enthedosageofabandonedleatherproductswas0．4-0．89，withtheincreasingofleathermealthe

4、removalrateofCr(III)couldenhanedto83．56％。l饧ilewhentheadsorbentquantityisgreaterthanO．89，theremovalrateofCr(III)declined．Theadsorptiondynamicswasinaccordancewiththepseudo．．second．．orderrateequationandcorrelationcoefjIicientwas0．9999．Therelevantfactorsofdiffusionmodelinthegranulesshowedth

5、attheadsorptionprocessofCr(III)，included2-3differentstages．WhenthepHintherangeof2--7，withtheincreasingofpHvalues，theadsorptioncapacityofCr(III)wasalsoincreased．Underthedifferentadsorptiontemperatureof25，35and45。C，themaximumadsorptioncapacityofCr(III)were1O．24megg，104．51mg／gand86．42mg／g．

6、3．StudyontheabandonedleatherproductsadsorptionofCrⅣI)TheadsorptionofCr(Ⅵ)ontheabandonedleatherproductscouldbesimulatedwellbyLangmuirequation．andthecorrelationcoefficientis0．9983．Itindicatesthattheadsorptionismonolayeradsorption．Withtheincreasingofabandonedleatherproductstheremovalrateof

7、Crm)inthesolutionincreasedandtendedtobestablefinally．Withtheincreasingofadsorptiontime．theadsorptioncapacityofCr(VI)increasedgradually．Thetestresultsshowst11atpseudo．second．orderrateequationcouldsuitablefortheadsorptionofCrⅣI)ontheabandonedleatherproducts．WiththeincreasingofpHv