聚酯醇解废液的脱色动力学
|
摘要
为实现聚酯醇解废液的有效再利用,本文研究了物理吸附法及电化学氧化法对实际聚酯醇解废液的脱色纯化,同时提出了脱色后醇解废液再利用的方法。选用γ-Al_2O_3、Fe_3O_4、Fe_3O_4@壳聚糖以及活性炭对醇解废液进行物理吸附脱色,选用Fe_3O_4@壳聚糖为分散电极对醇解废液进行电化学氧化脱色,对比不同脱色方法及反应条件对脱色效果的影响,分析吸附动力学参数及电化学氧化动力学参数。数据表明,采用物理吸附法脱色,活性炭表现出最强脱色能力,活性炭投加量为200mg/L时,吸附平衡需12h,最大单位吸附质量为44.84mg/g,脱色率为84.56%,吸附动力学曲线符合伪二级反应动力学模型;采用电化学氧化脱色法,脱色平衡时间可缩短至5h,最大脱色率为94.62%,动力学曲线符合一级反应动力学模型。
In order to realize the effective reusing, alcoholysis waste liquid of polyethylene terephthalate(PET) was decolorized by adsorption and electrochemical methods and reused to degrade PET. Alcoholysis waste liquid, was decolorized by utilizing γ-Al_2O_3, Fe_3O_4, Fe_3O_4@chitosan and activated carbon as adsorbents. The alcoholysis waste liquid of PET was also decolorized by means of electrochemical method by utilizing Fe_ 3O_4@chitosan nanoparticles as the dispersed electrodes. The effects of decolorization methods, dosage and treating time on the color removal ratio were compared. The dynamic parameters of adsorption and electrochemical reaction were studied. Adsorption kinetic curve conformed to pseudo second order reaction model. The highest color removal ratio of was 84.56% and the maximum unit adsorption mass was 44.84 mg/g by treating with 200 mg/L activated carbon for 12 h. The highest color removal ratio of electrochemical method was 94.62% after 5 h treating. The kinetic curve conformed to first order reaction model.
In order to realize the effective reusing, alcoholysis waste liquid of polyethylene terephthalate(PET) was decolorized by adsorption and electrochemical methods and reused to degrade PET. Alcoholysis waste liquid, was decolorized by utilizing γ-Al_2O_3, Fe_3O_4, Fe_3O_4@chitosan and activated carbon as adsorbents. The alcoholysis waste liquid of PET was also decolorized by means of electrochemical method by utilizing Fe_ 3O_4@chitosan nanoparticles as the dispersed electrodes. The effects of decolorization methods, dosage and treating time on the color removal ratio were compared. The dynamic parameters of adsorption and electrochemical reaction were studied. Adsorption kinetic curve conformed to pseudo second order reaction model. The highest color removal ratio of was 84.56% and the maximum unit adsorption mass was 44.84 mg/g by treating with 200 mg/L activated carbon for 12 h. The highest color removal ratio of electrochemical method was 94.62% after 5 h treating. The kinetic curve conformed to first order reaction model.
引文
[1]KARAYANNIDIS G P,ACHILIAS D S.Chemical recycling of poly(ethylene terephthalate)[J].Macromolecular Materials&Engineering,2007,292(2):128-146.
[2]SINHA V,PATEL M R,PATEL J V.PET waste management by chemical recycling:a review[J].Journal of Polymers&the Environment,2010,18(1):8-25.
[3]GHOLAMZAD E,KARIMI K,MASOOMI M.Effective conversion of waste polyester–cotton textile to ethanol and recovery of polyester by alkaline pretreatment[J].Chemical Engineering Journal,2014,253(7):40-45.
[4]WELLE F.Twenty years of PET bottle to bottle recycling——an overview[J].Resources,Conservation and Recycling,2011,55(11):865-875.
[5]AGUADO A,MARTíNEZ L,BECERRA L,et al.Chemical depolymerisation of PET complex waste:hydrolysis vs.glycolysis[J].Journal of Material Cycles&Waste Management,2014,16(2):201-210.
[6]张芸,王晓静,代文臣,等.组合膜分离技术资源化处理印染废水工艺的研究[J].水资源与水工程学报,2015,26(4):29-34.ZHANG Yun,WANG Xiaojing,DAI Wenchen,et al.Research on technique of separation process of combined membrane for textile wastewater resource[J].Journal of Water Resources and Water Engineering,2015,26(4):29-34.
[7]徐言慧,尹显洪,邱江源,等.多孔材料Cu3(BTB)2和H2O2处理偶氮染料废水及机理[J].化工进展,2017,36(12):4700-4707.XU Yanhui,YIN Xianhong,QIU Jiangyuan,et al.Application and mechanism of azo dye wastewater treatment using Cu3(BTB)2 and H2O2[J].Chemical Industry and Engineering Progress,2017,36(12):4700-4707.
[8]MAHMOODI N M,NAJAFI F,KHORRAMFAR S,et al.Synthesis,characterization and dye removal ability of high capacity polymeric adsorbent:polyaminoimide homopolymer[J].Journal of Hazardous Materials,2011,198(2):87-94.
[9]RADHA K V,SRIDEVI V,KALAIVANI K,et al.Electrochemical decolorization of the dye acid Orange 10[J].Desalination&Water Treatment,2009,7(1/2/3):6-11.
[10]吴丽颖,王炳煌,张圆春,等.凝胶球负载零价铁活化过硫酸盐降解偶氮染料废水[J].化工进展,2017,36(6):2318-2324.WU Liying,WANG Binghuang,ZHANG Yuanchun,et al.Degradation of Reactive Black 5(RBK5)by gelatin balls loading iron activating sodium persulfate[J].Chemical Industry and Engineering Progress,2017,36(6):2318-2324.
[11]SHEN L,YAN P,GUO X,et al.Three-dimensional electro-fenton degradation of methyleneblue based on the composite particle electrodes of carbon nanotubes and nano-Fe3O4[J].Arabian Journal for Science and Engineering,2014,39(9):6659-6664.
[12]杨琥,袁博,卢耀柏,等.壳聚糖磁性微球的制备及在水处理中的应用[J].中国科学(B辑:化学),2008(9):755-761.YANG Hu,YUAN Bo,LU Yaobai,et al.Preparation and application of chitosan microspheres in water treatment[J].Science in China(Series B:Chemistry),2008(9):755-761.
[13]姜炜,李凤生,杨毅,等.磁性壳聚糖复合微球的制备和性能研究[J].材料科学与工程学报,2004,22(5):660-662.JIANG Wei,LI Fengsheng,YANG Yi,et al.Preparation and characterization of magnetic chitosan microspheres for the carriers of radionuclides in therapy[J].Journal of Materials Science and Engineering,2004,22(5):660-662.
[14]谢婷玉,荆肇乾,王郑,等.壳聚糖的絮凝性能及其在废水脱色处理中的应用[J].化工环保,2016,36(4):381-385.XIE Tingyu,JING Zhaoqian,WANG Zheng,et al.Flocculation performance of chitosan and its application in decolorization of wastewater[J].Environmental Protection of Chemical Industry,2016,36(4):381-385.
[15]李梦娟,黄艳红,余天石,等.醇解废弃聚酯纤维制备阻燃硬质聚氨酯泡沫[J].化工新型材料,2014(2):63-65.LI Mengjuan,HUANG Yanhong,YU Tianshi,et al.Flame-retardant rigid polyurethane foams based on chemical recycled waste poly(ethylene terephthalate)[J].New Chemical Materials,2014,42(2):63-65.
[16]YANG X,AL-DURI B.Kinetic modeling of liquid-phase adsorption of reactive dyes on activated carbon[J].Journal of Colloid&Interface Science,2005,287(1):25-34.
[17]张鉴达.MCM-41介孔硅材料的改性及其对水中磷酸根的吸附研究[D].上海:上海交通大学,2011.ZHANG Jianda.The synthesis of modified MCM-41 for phosphate removal[D].Shanghai:Shanghai Jiaotong University,2011.
[18]LOAIZA-AMBULUDI S,OTURAN N,?ZCAN A,et al.Electro-Fenton degradation of anti-inflammatory drug ibuprofen in hydroorganic medium[J].Journal of Electroanalytical Chemistry,2013,702(2):31-36.
[2]SINHA V,PATEL M R,PATEL J V.PET waste management by chemical recycling:a review[J].Journal of Polymers&the Environment,2010,18(1):8-25.
[3]GHOLAMZAD E,KARIMI K,MASOOMI M.Effective conversion of waste polyester–cotton textile to ethanol and recovery of polyester by alkaline pretreatment[J].Chemical Engineering Journal,2014,253(7):40-45.
[4]WELLE F.Twenty years of PET bottle to bottle recycling——an overview[J].Resources,Conservation and Recycling,2011,55(11):865-875.
[5]AGUADO A,MARTíNEZ L,BECERRA L,et al.Chemical depolymerisation of PET complex waste:hydrolysis vs.glycolysis[J].Journal of Material Cycles&Waste Management,2014,16(2):201-210.
[6]张芸,王晓静,代文臣,等.组合膜分离技术资源化处理印染废水工艺的研究[J].水资源与水工程学报,2015,26(4):29-34.ZHANG Yun,WANG Xiaojing,DAI Wenchen,et al.Research on technique of separation process of combined membrane for textile wastewater resource[J].Journal of Water Resources and Water Engineering,2015,26(4):29-34.
[7]徐言慧,尹显洪,邱江源,等.多孔材料Cu3(BTB)2和H2O2处理偶氮染料废水及机理[J].化工进展,2017,36(12):4700-4707.XU Yanhui,YIN Xianhong,QIU Jiangyuan,et al.Application and mechanism of azo dye wastewater treatment using Cu3(BTB)2 and H2O2[J].Chemical Industry and Engineering Progress,2017,36(12):4700-4707.
[8]MAHMOODI N M,NAJAFI F,KHORRAMFAR S,et al.Synthesis,characterization and dye removal ability of high capacity polymeric adsorbent:polyaminoimide homopolymer[J].Journal of Hazardous Materials,2011,198(2):87-94.
[9]RADHA K V,SRIDEVI V,KALAIVANI K,et al.Electrochemical decolorization of the dye acid Orange 10[J].Desalination&Water Treatment,2009,7(1/2/3):6-11.
[10]吴丽颖,王炳煌,张圆春,等.凝胶球负载零价铁活化过硫酸盐降解偶氮染料废水[J].化工进展,2017,36(6):2318-2324.WU Liying,WANG Binghuang,ZHANG Yuanchun,et al.Degradation of Reactive Black 5(RBK5)by gelatin balls loading iron activating sodium persulfate[J].Chemical Industry and Engineering Progress,2017,36(6):2318-2324.
[11]SHEN L,YAN P,GUO X,et al.Three-dimensional electro-fenton degradation of methyleneblue based on the composite particle electrodes of carbon nanotubes and nano-Fe3O4[J].Arabian Journal for Science and Engineering,2014,39(9):6659-6664.
[12]杨琥,袁博,卢耀柏,等.壳聚糖磁性微球的制备及在水处理中的应用[J].中国科学(B辑:化学),2008(9):755-761.YANG Hu,YUAN Bo,LU Yaobai,et al.Preparation and application of chitosan microspheres in water treatment[J].Science in China(Series B:Chemistry),2008(9):755-761.
[13]姜炜,李凤生,杨毅,等.磁性壳聚糖复合微球的制备和性能研究[J].材料科学与工程学报,2004,22(5):660-662.JIANG Wei,LI Fengsheng,YANG Yi,et al.Preparation and characterization of magnetic chitosan microspheres for the carriers of radionuclides in therapy[J].Journal of Materials Science and Engineering,2004,22(5):660-662.
[14]谢婷玉,荆肇乾,王郑,等.壳聚糖的絮凝性能及其在废水脱色处理中的应用[J].化工环保,2016,36(4):381-385.XIE Tingyu,JING Zhaoqian,WANG Zheng,et al.Flocculation performance of chitosan and its application in decolorization of wastewater[J].Environmental Protection of Chemical Industry,2016,36(4):381-385.
[15]李梦娟,黄艳红,余天石,等.醇解废弃聚酯纤维制备阻燃硬质聚氨酯泡沫[J].化工新型材料,2014(2):63-65.LI Mengjuan,HUANG Yanhong,YU Tianshi,et al.Flame-retardant rigid polyurethane foams based on chemical recycled waste poly(ethylene terephthalate)[J].New Chemical Materials,2014,42(2):63-65.
[16]YANG X,AL-DURI B.Kinetic modeling of liquid-phase adsorption of reactive dyes on activated carbon[J].Journal of Colloid&Interface Science,2005,287(1):25-34.
[17]张鉴达.MCM-41介孔硅材料的改性及其对水中磷酸根的吸附研究[D].上海:上海交通大学,2011.ZHANG Jianda.The synthesis of modified MCM-41 for phosphate removal[D].Shanghai:Shanghai Jiaotong University,2011.
[18]LOAIZA-AMBULUDI S,OTURAN N,?ZCAN A,et al.Electro-Fenton degradation of anti-inflammatory drug ibuprofen in hydroorganic medium[J].Journal of Electroanalytical Chemistry,2013,702(2):31-36.
© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号 地址：北京市海淀区学院路29号 邮编：100083 电话：办公室：(+86 10)66554848；文献借阅、咨询服务、科技查新：66554700 |