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铂族元素在含氯流体中的热液活动性实验研究.docx

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铂族元素在含氯流体中的热液活动性实验研究 Abstract Thispaperpresentsastudyonthethermodynamicactivityofplatinum-groupelements(PGEs)inachlorine-containingfluid.TheresearchaimstoinvestigatethebehaviorofPGEsinhydrothermalsystemsandtheirinteractionwithchlorine-richfluids.Theexperimentalmethodinvolvedtheuseofhigh-temperatureandhigh-pressureautoclavestosimulatehydrothermalconditions.X-rayfluorescence(XRF)andinductivelycoupledplasmamassspectrometry(ICP-MS)wereusedtodeterminetheconcentrationofPGEsinthefluidsamples.TheresultsshowedthattheactivitycoefficientsofPGEsinthechlorine-containingfluidweresignificantlyaffectedbytemperature,pressure,andthecompositionofthefluid. 1.Introduction Theplatinum-groupelements,includingplatinum,palladium,rhodium,ruthenium,iridium,andosmium,areknownfortheiruniquecatalyticpropertiesandhigheconomicvalue.Theyarewidelyusedinvariousindustries,includingautomotive,chemical,andelectronics.ThemajorityofPGEsaresourcedfrommineraldeposits,withSouthAfrica,Russia,andCanadabeingthelargestproducers.ThebehaviorofPGEsinhydrothermalsystems,particularlyinthepresenceofchlorine-richfluids,isofgreatinterestduetothepotentialfortheirextractionfromsuchenvironments. 2.ExperimentalMethod Theexperimentalsetupconsistedofhigh-temperatureandhigh-pressureautoclavescapableofsimulatinghydrothermalconditions.Chlorine-containingfluidswerepreparedbydissolvingsodiumchloride(NaCl)indeionizedwater.TheconcentrationsofNaClvariedtoinvestigatetheeffectofdifferentchlorineconcentrationsontheactivityofPGEs.Theautoclavesystemwasheatedtodesiredtemperatures,rangingfrom200°Cto400°C,andmaintainedatpressuresof500to1000bar.FluidsampleswerecollectedatvarioustimeintervalsandanalyzedforPGEconcentrationsusingXRFandICP-MS. 3.ResultsandDiscussion TheconcentrationofPGEsinthefluidsampleswasfoundtobedependentontemperature,pressure,andtheconcentrationofchlorineinthefluid.Athighertemperaturesandpressures,thesolubilityofPGEsinthefluidincreased,leadingtohigherconcentrations.However,thepresenceofchlorinehadacomplexeffect.Atlowchlorine