含砷金矿生物堆浸氧化的模拟研究（英文）-豆柴文库

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含砷金矿生物堆浸氧化的模拟研究（英文）
Abstract:
Bioleachingprocessisaneffectiveapproachforextractinggoldfromarsenic-containinggoldore.Inthisstudy,asimulationmodelwasdevelopedtoinvestigatethebioleachingprocessofarsenic-containinggoldore.Themodelwasbasedonthemathematicalformulationofthebioleachingmechanismandthekineticsofmicrobialgrowth.ThesimulationresultsshowedthatthebioleachingprocesswasaffectedbyseveralfactorssuchasinitialpH,temperature,andconcentrationofnutrients.Inaddition,themodelrevealedthatthemicrobialpopulationwasresponsiblefortheoxidationofarsenicandthedissolutionofgold.Theproposedsimulationmodelprovidesavaluabletoolforoptimizingthebioleachingprocessandforpredictingtheperformanceofthebioreactors.
Introduction:
Goldisoneofthemostsought-afterpreciousmetalsintheworldduetoitshighvalueandscarcity.However,theextractionofgoldfromitsoresisoftenassociatedwithenvironmentalproblemsandhealthrisksduetotheuseoftoxicchemicalssuchascyanide.Asaresult,thereisanincreasinginterestindevelopingeco-friendlyandsustainablegoldextractiontechniques.
Bioleachingisapromisingapproachforextractinggoldfromlow-gradeores.Thisprocessinvolvestheuseofmicroorganismstooxidizesulfidesandliberatethemetalfromtheore.However,bioleachingofarsenic-containinggoldoresisacomplexprocessduetothetoxicityofarsenictomicroorganisms.Inthisstudy,asimulationmodelwasdevelopedtoinvestigatethebioleachingprocessofarsenic-containinggoldore.
MaterialsandMethods:
Thesimulationmodelwasbasedonthemassbalanceequationsofthebioleachingreactor.Themodelincorporatedthekineticsofmicrobialgrowth,bio-oxidationofsulfides,andthedissolutionofgold.Themodelparameterswereestimatedfromtheliteratureandexperimentaldata.Theinitialconditionsofthereactorweresetbasedontheenvironmentalconditionsofthebioleachingprocess.
ThesimulationwascarriedoutusingtheMATLABsoftwarepackage.TheeffectofvariousparameterssuchaspH,temperature,andconcentrationofnutrientsonthebioleachingprocesswasinvestigatedusingthesimulationmodel.
ResultsandDiscussion:
Thesimulationresultsshowedthatth