电絮凝技术在废弃涤纶醇解液脱色中的应用

第40卷第10期2019年10月纺织学报JournalofTextileResearchVol.40,No.10Oct.,2019DOI:10.13475/j.fzxb.20180604107电絮凝技术在废弃涤纶醇解液脱色中的应用陈欣1,2,张家琳1,2,王纪冬1,2,李晓强1,2,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)摘要针对涤纶醇解液造成的环境污染问题,采用电絮凝技术对其进行脱色。将铝电极和铜电极分别作为电絮凝反应系统的阳极和阴极,研究了电絮凝过程中电解电压、电解质质量浓度、初始pH值以及染料初始质量浓度等因素对脱色率的影响。通过对电极和絮凝体进行相关测试,探讨电絮凝技术的脱色机制,并建立了涤纶醇解液脱色过程的动力学方程。结果表明:在电压为20V,初始pH值为8,电解质质量浓度为0.80g/L,染料初始质量浓度为60mg/L的条件下,醇解液的脱色效果较好,电解80min后脱色率可超过95%以上;铝电极处理涤纶醇解液的电絮凝过程较吻合动力学二级反应过程。关键词废弃涤纶;醇解液;电絮凝;脱色率;涤纶回收利用中图分类号:TS190.3文献标志码:ADecolorizationofpolyesteralcoholysissolutionbyelectrocoagulationCHENXin1,2,ZHANGJialin1,2,WANGJidong1,2,LIXiaoqiang1,2,GEMingqiao1,2(1.SchoolofTextileandClothing,JiangnanUniversity,Wuxi,Jiangsu214122,China;2.KeyLaboratoryofEco-Textiles(JiangnanUniversity),MinistryofEducation,Wuxi,Jiangsu214122,China)AbstractInordertosolvetheproblemofenvironmentalpollutioncausedbypolyesteralcoholysissolution,theelectrocoagulationwasusedtodecolorizethesolution.Analuminumelectrodeandacopperelectrodewereusedastheanodeandcathodeoftheelectroflocculationreactionsystem,respectively.Theinfluencesofelectrolysisvoltage,electrolyteconcentration,initialpHvalueandinitialdyeconcentrationonthedecolorizationrateduringelectroflocculationwerestudied.Theelectrodesandflocsweretested,themaindecolorizationmechanismoftheelectrocoagulationprocesswasdiscussed,andthekineticequationofthedecolorizationwasestablished.Theresultsshowthattheoptimalprocessparametersincludeavoltageof20V,aninitialpHvalueof8,anelectrolyteconcentrationof0.80g/Landaninitialconcentrationof60mg/L,andthedecolorizationrateishighthan95%afterelectrolyzingfor80min.Theelectrocoagulationprocessofpolyesteralcoholysissolutionwithanaluminumelectrodeconformstothesecond-orderkineticmodel.Keywordswastepolyester;alcoholysissolution;electrocoagulation;decolorizationrate;polyesterrecyclingandutilization收稿日期:2018-06-11修回日期:2019-06-26基金项目:国家重点研发计划项目(2016YFB0302901);中央高校基本科研业务费专项资金重点项目(JUSRP51723B);国家自然科学基金项目(51503083)第一作者:陈欣(1995—),女,硕士。主要研究方向