CuOγ-Al2O3催化双氧水处理聚乙烯醇废水的研究
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2020-04-30 18:06:58
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第一作者:苏扬帆,女,1994年生,硕士研究生,研究方向为纺织功能材料生产废水的处理。#通讯作者。*中央高校基本科研业务费专项资金资助项目(No.JUSRP51723B)。CuO/γ-Al2O3催化双氧水处理聚乙烯醇废水的研究*苏扬帆1李梦娟1,2李艳艳1葛明桥1,2#(1.江南大学纺织服装学院,江苏无锡214122;2.生态纺织教育部重点实验室(江南大学),江苏无锡214122)摘要采用浸渍—煅烧法制备CuO/γ-Al2O3催化剂,并用其催化双氧水处理聚乙烯醇(PVA)废水,对比了不同煅烧温度下CuO/γ-Al2O3的催化性能以及催化剂投加量、双氧水投加量、PVA初始质量分数对PVA去除率的影响。结果表明,煅烧温度为450℃时得到的CuO/γ-Al2O3催化性能最好,增加CuO/γ-Al2O3和双氧水的投加量均有助于降低PVA降解产物黏均分子量,而PVA初始质量分数越高,PVA降解产物的黏均分子量越高。当PVA初始质量分数为1.0%,双氧水投加量为60mL/L,CuO/γ-Al2O3投加量为1.0g/L,反应温度为60℃,溶液初始pH=3时,反应2h后PVA去除率达90%以上,PVA降解产物的黏均分子量从100773降至3194,下降了近97%,CuO/γ-Al2O3的催化性能随着重复使用次数的增加有一定下降。关键词CuO/γ-Al2O3催化氧化降解聚乙烯醇重复利用性DOI:10.15985/j.cnki.1001-3865.2017.12.004TreatmentofpolyvinylalcoholsolutionbyhydrogenperoxidecatalyzedwithCuO/γ-Al2O3SUYangfan1,LIMengjuan1,2,LIYanyan1,GEMingqiao1,2.(1.CollegeofTextile&Clothing,JiangnanUniversity,WuxiJiangsu214122;2.KeyLaboratoryofEco-Textiles(JiangnanUniversity),MinistryofEducation,WuxiJiangsu214122)Abstract:CuO/γ-Al2O3nanoparticleswerepreparedbywetimpregnation-calcinationmethod,theobtainedcat-alystwasusedtocatalyzehydrogenperoxideforthetreatmentofpolyvinylalcoholsolution.TheeffectofcalcinationtemperatureonCuO/γ-Al2O3propertyandCuO/γ-Al2O3dosage,hydrogenperoxidedosage,initialPVAconcentra-tionontheremovalefficiencyofPVAwereinvestigated.ResultsrevealedthattheCuO/γ-Al2O3nanoparticlescalci-natedat450℃exhibitedthebestcatalyticcapability.Besides,thedegradationofPVAwaspromotedbyincreasinghy-drogenperoxideaswellasCuO/γ-Al2O3dosage,whilehigherinitialPVAconcentrationgoingagainsttheeffectivedegradation,leadingtoahigherviscosity-averagemolecularweightofdegradationproducts.Inthispaper,morethan90%ofPVAwasremovedafter2hoftreatmentunderconditionsofinitialPVAconcentrationof1.0%,temperatureof60℃,pH=3,hydrogenperoxidedosageof60mL/LandCuO/γ-Al2O3dosageof1.0g/L,averagemolecularweightofPVAdegradationproductswasdecreasedby97%,from100773to3194.Thenanocatalystcouldberecy-cledbyfiltrationandcalcination,butthecatalyticabilitywasslightlydecreasedinfour-timesutilization.Keywords:CuO/γ-Al2O3;c
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