新型脉冲电源研制及其处理六氯苯废水的分析-development of a new pulse power supply and analysis of its treatment of hexachlorobenzene wastewater.docx

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2018-06-03 发布于上海
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新型脉冲电源研制及其处理六氯苯废水的分析-development of a new pulse power supply and analysis of its treatment of hexachlorobenzene wastewater.docx

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新型脉冲电源研制及其处理六氯苯废水的分析-development of a new pulse power supply and analysis of its treatment of hexachlorobenzene wastewater

oxidizingactivespecie,andH2O2isthemoststableactivespecie.TheresultsshowedthattheconcentrationsofH2O2increasedwithincreasingthepeakvoltageandairflowrate.TheconcentrationsofH2O2increasedgreatlywhenairwasinjectedintothereactionregionduringthedischargeprocess.Whentheexperimentalconditionwas35kVpeakvoltage,30Hzfrequencyand2cmdistancebetweenelectrodes,theinitialratesofH2O2were11.7and1.67×10-9mol/swithandwithoutbubblingair,respectively.EnergyefficiencyofproductionH2O2wasfoundtobe6.56and0.96×10-11mol/Jwithandwithoutbubblingair,respectively.TheadditionofarightamountofTiO2greatlyincreasedtheconcentrationsofH2O2.Theresultsoftheorthogonalexperimentshowthatprimaryandsecondaryfactorsarepeakvoltage,dischargetime,andairflowrate.Highperformanceliquidchromatography(HPLC)hasbeenemployedtomeasurethedefiniteconcentrationofOH·radicalsproducedbythenovelnanosecondpulsepowerbydeterminingthehydroxylatedderivativesofsalicylicacid.200mg/LsalicylicacidwasusedtotrapOH·radicalsintermoftheeffectivetrapping.Itwasobservedthat2.3-dHBAand2.5-dHBAwereproducedaboutinproportionsof30%and70%,respectively.TherepeatabilitywasexaminedthroughtheR.S.D.sofpeakareas.TheresultsshowedthattheconcentrationsofOH·increasedwithincreasingthepeakvoltage,theinitialratesofOH·were4.1,5.7,and7.7×10-10mol/sat30,35,and40kVwithoutbubblingair,respectively,andtheinitialratesofOH·were18.1,22.1,and26.1×10-10mol/sat30,35,and40kVwithbubblingair,respectively.TheconcentrationsofOH·increasedgreatlywhenairwasinjectedintothereactionregionduringthedischargeprocess.EnergyefficiencyofproductionOH·withoutbubblingairwasfoundtobeindependentoftheappliedpowerinputparametersandanaveragevalueof3.23×10-12mol/Jwasobtained.EnergyefficiencyofproductionOH·withbubblingairdecreasedwithincreasingtheinputenergy.ThedegradationofHCBbythepulseddischargeplasmausinganeedle–platereactorhasbeeninvestigated.Effectsofsomefactorswerestudied,includingpeakvoltages,treatmenttime,andairflowrate.ThedegradationreactionofHCBaccordedwellwithpseudofirstorderkinetics,andthedegr