反應(yīng)控制型ph調(diào)節(jié)作用下水溶液中sⅳ的氧化與nahso,4的制備

1、中山大學(xué)碩士學(xué)位論文反應(yīng)控制型pH調(diào)節(jié)作用下水溶液中S（Ⅳ）的氧化與NaHSO的制備姓名：彭敏申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：物理化學(xué)指導(dǎo)教師：劉鴻20070603中山大學(xué)碩士學(xué)位論文反應(yīng)控制型pH調(diào)節(jié)作用下水溶液中S(IV)的氧化與NaHs04的制備ABSTRACTAnalternativetOoxidizeaqueousS02(HS03一／S032—1andprepareNaHS04w∞developedTheresearchWaScarr

2、iedoutinanelectrochemicalreactorwithgraphiteasthecathodeandplatinumastheanodeTheinfluenceofinitialsolutionpH，Na2S04concentrationincathodechamberandoxygenflowrateontheoxidationof7mM(by)sulfiteWaSinvestigatedItwasfoundthat

3、theS(1V)oxidationproceededmosteffectivelyatinitialpH7，andtheoxygenflowratedidnotaffecttheoxidationwhenitisabove01L／minThelowertheNa2S04concentrationincathodechamber(forexamplebelow065mol／L)，thefaStertheoxidationWaSinthef

4、irst5minbutmoredifficultforp8keepingTheexperimentsalsoshowedthatinthecathodicchamberwhereoxygenWaSsuppliedtheS02(HS03一／S032一)waSoxidizedtoS042，andthisoxidationledtoaHreleaseAtthe強(qiáng)metime，theoxygenWaSelectrochemicallyreduc

5、edonthegraphitesurfacewhichledtoaHconsumptionthusthepHvalueinthischambercouldbekeptwithoutsignificantchangeThispHkeepingbenefitedafurtherS02absorptionandoxidationWestudythepHcontrollingandoxidationunderdifferentcun℃mWefo

6、undoutthatwithcurrentappliedtheoxidationwasacceleratedwheninitialpHwas4Or5howeverthisdidnothappenwithinitialpH7TheNa2S04solutionproducedinthecathodicchambercouldbetransferredtotheanodicchamberinwhichitwouldbetornedintoNa

7、HS04becauseofthepHdecreasecausedbytheH20oxidationthathappenedontheplatinumsurfaceBoththepHkeepingandthepHdecrease，calledareactioncontrolledpHadjustment(RCpA)，utilizedthereactianreleusedHandOH—insteadofchemicaladditionOur