零价铁与过硫酸盐异相芬顿降解活性艳橙X-GN
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2020-04-16 15:14:16
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第42卷第4期2016年8月环境保护科学EnvironmentalProtectionScienceVo1.42N‘1.4Aug2016.11()~II4零价铁与过硫酸盐异相芬顿降解活性艳橙X—GN林影,梁好,刘传胜,吴锦华,李平’(1.华南理工大学环境与能源学院,工业聚集区污染控制与生态修复教育部重点实验室,污染控制与生态修复广东省普通高等学校重点实验室,固体废物处理与资源化广东省环境保护重点实验室,广东广州5l(xx的;2.广州军区联勤部净水研究所,广东广州510500)摘要:采用零价铁(Fe)与过硫酸盐构建异相类芬顿体系,lt/Fe”腐蚀释放Fe催化s,o!产生硫酸根自由基快速降解偶氮染料活性艳橙,考察了初始pH值、Fe”投加量、过硫酸盐投加量和温度对降解过程的影响。结果表明,'---3活性艳橙初始浓度为100mg/L、pH值为7、Fe~投加量为0.5g/L、过硫酸盐投加量为lnm~ol/L和反应温度为30时,反应u后活性艳橙降解率达~t192.6%。酸性条件和提高反应温度均有利反应的进行,而且活性艳橙的降解率在初始pH值为t,时也高于90%。反应过程符合准一级动力学,表观反应速率常数k为0.0513min。(3()℃)。uv—Vis扫描显示,活性艳橙的友色基团在反应过程中被破坏。由Fe“与s,0构成的异~Fenton体系可作为一种高效手段用于染料废水的处理,关键词:零价铁;过硫酸盐;异相芬顿;活性艳橙中图分类号:X78B文献标志码:ADOI:10.16803~.cnki.issn.1o04—6216.2016,()4.023EffectiveDegradationofReactiveBrilliantOrangeX-GNbyHeterOgeneOusFentonReactionwithZeroValentIronandPersulfateLinYing,LiangHao,LiuChuansheng,WuJinhua,LiPing。(1.GuangdongEnvironmentalProtectionKeyLaboratoryofSolidWasteTreatmentandRecycling,KeyI~)oratoryt'f_t'ollutionConlr{'1andEco—remediationofGuangdongRegularHigherEducationInstitutions.KeyLaboratoryofPollutionContmlair1‘I)一1esh}ralioninIndustryClusters,MinistryofEducation,SchoolofEnvironmentandEnergy,SouthChinaUniversityofTechn()logy,(:Imngz]⋯J510006,China;2.InstituteofPurificationWater,LogisticDepartmentofGuangzhouMilitaryArea,Gnangzlmu510500,China)Abstract:HeterogeneousFentonlikesystemwasestablishedbyzerovalentiron(ZVI)andpersldfatetofleO.dItcHIIazoIlyereactivebrilliantorange(X-GN)withsulfateradicalsgeneratedinsitufromZVIandpersulfate.Thecite(:ts·)finitialt,l1.ZVlalldpersulfatedosage,andtemperatureonthedegradationprocesswereinvestigated.TheresultsshowedthatanX-GNdegl’adationeficiencyof92.6%wasachievedafter60minofreactiontimewithaninitialX-GNconcentrationof100m1lUutertyl,i{lconditions(ZVIof0.5g/L,persulfateof1mmol/L,pHof7andat30。C).DegradationofX-GNwasanaciddIivenprocessandadegradationeficiencyofmorethan90%wasobtainedastheinitialpHwas9.ThedegradationefficiencyofX—GNalSOinor{~asellathigherreactiontemperature.ThedegradationofX-GNfollowedpseudo—firstorder
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