过一硫酸盐的活化及其降解水中有机污染物机理的研究进展
|
摘要
基于活化过一硫酸盐(PMS)产生SO_4~-·的新型高级氧化技术,在芬顿和类芬顿催化降解水中有机污染物的研究中占有重要地位。本文从活化PMS方法的特点和用途出发,对目前活化PMS的主要方法进行了论述,并对活化PMS降解水中有机污染物的机理进行了探讨,最后对该领域研究中存在的问题进行了分析。指出,开发高效的协同活化PMS的方法将成为该领域研究的必然趋势。
A new type of advanced oxidation technology based on sulfate radicals,produced by activation of peroxymonosulfate(PMS),occupies an important position in Fenton catalysis and Fenton-like catalysis for degradation of organic pollutants in aqueous solutions. In this paper,started from the traits and uses of the methods of activating PMS,the main methods of activating PMS are summarized,and the mechanisms of degrading organic pollutants in aqueous solutions by activating PMS are discussed. Finally,the existing questions in this research field are analyzed. It is pointed out that the development of an efficient method for synergistic activation of PMS will be an inevitable trend in this research field.
A new type of advanced oxidation technology based on sulfate radicals,produced by activation of peroxymonosulfate(PMS),occupies an important position in Fenton catalysis and Fenton-like catalysis for degradation of organic pollutants in aqueous solutions. In this paper,started from the traits and uses of the methods of activating PMS,the main methods of activating PMS are summarized,and the mechanisms of degrading organic pollutants in aqueous solutions by activating PMS are discussed. Finally,the existing questions in this research field are analyzed. It is pointed out that the development of an efficient method for synergistic activation of PMS will be an inevitable trend in this research field.
引文
[1]DENG Y,EZYSKE C M.Sulfate radical-advanced oxidation process(SR-AOP)for simultaneous removal of refractory organic contaminants and ammonia in landfill leachate[J].Water Res,2011,45(18):6189-6194.
[2]DU Y C,MA W J,LIU P X,et al.Magnetic CoFe2O4nanoparticles supported on titanate nanotubes(Co Fe2O4/TNTs)as a novel heterogeneous catalyst for peroxymonosulfate activation and degradation of organic pollutants[J].J Hazard Mater,2016,308:58-66.
[3]CHENG X X,LIANG H,DING A,et al.Ferrous iron/peroxymonosulfate oxidation as a pretreatment for ceramic ultrafiltration membrane:control of natural organic matter fouling and degradation of atrazine[J].Water Res,2017,113:32-41.
[4]TAO Y F,NI Q,WEI M Y,et al.Metal-free activation of peroxymonosulfate by g-C3N4 under visible light irradiation for the degradation of organic dyes[J].RSCAdv,2015,5(55):44128-44136.
[5]YANG S Y,XIAO T,ZHANG J,et al.Activated carbon fiber as heterogeneous catalyst of peroxymonosulfate activation for efficient degradation of Acid Orange7 in aqueous solution[J].Sep Purif Technol,2015,143:19-26.
[6]史宸菲,贾淑敏,李雨濛,等.水稻秸秆生物炭-过硫酸盐去除水中p-硝基酚[J].化工环保,2017,37(6):632-637.
[7]WANG Y X,SUN H Q,ANG H M,et al.3D-hierarchically structured MnO2 for catalytic oxidation of phenol solutions by activation of peroxymonosulfate:structure dependence and mechanism[J].Appl Catal,B,2015,164:159-167.
[8]YU F K,ZHOU M H,ZHOU LEI,et al.A novel electro-Fenton process with H2O2 generation in a rotating disk reactor for organic pollutant degradation[J].Environ Sci Technol Lett,2014,1(7):320-324.
[9]PANDA N,SAHOO H,MOHAPATRA S.Decolourization of methyl orange using Fenton-like mesoporous Fe2O3-SiO2 composite[J].J Hazard Mater,2011,185(1):359-365.
[10]余丽胜,李晓霞,焦纬洲,等.超声协同Fenton法处理有机废水的研究进展[J].化工环保,2017,37(1):38-42.
[11]GOMATHI DEVI L,GIRISH KUMAR S,MOHANREDDY K,et al.Photo degradation of Methyl Orange an azo dye by advanced Fenton process using zero valent metallic iron:influence of various reaction parameters and its degradation mechanism[J].J Hazard Mater,2009,164(2/3):459-467.
[12]RAMIREZ J H,MALDONADO-HóDAR F J,PéREZ-CADENAS A F,et al.Azo-dye OrangeⅡdegradation by heterogeneous Fenton-like reaction using carbon-Fe catalysts[J].Appl Catal,B,2007,75(3/4):312-323.
[13]DUTTA K,MUKHOPADHYAY S,BHATTACHA-RJEE S,et al.Chemical oxidation of methylene blue using a Fenton-like reaction[J].J Hazard Mater,2001,84(1):57-71.
[14]朱思瑞,高乃云,鲁仙,等.热激活过硫酸盐氧化降解水中双酚A[J].中国环境科学,2017,37(1):188-194.
[15]相青青.碱活化过一硫酸盐及其在处理染料废水中的应用研究[D].武汉:中南民族大学,2012.
[16]HUANG K C,ZHAO Z Q,HOAG G E,et al.Degradation of volatile organic compounds with thermally activated persulfate oxidation[J].Chemosphere,2005,61(4):551-560.
[17]王萍.过硫酸盐高级氧化技术活化方法研究[D].青岛:中国海洋大学,2010.
[18]刘丽艳,孙至柔,叶文博,等.超声辅助Fe3O4活化过一硫酸盐降解酸性红B[J].化工进展,2016,35(11):3663-3668.
[19]刘丽艳,杨洋,刘芃宏,等.基于频谱分析方法的超声空化场三维重建及其分布[J].天津大学学报(自然科学与工程技术版),2014,47(11):962-966.
[20]王莹,陈家斌,张黎明,等.超声波协同活性碳纤维活化过一硫酸盐降解AO7[J].环境科学学报,2017,37(4):1404-1412.
[21]LIU C N,PAN D Y,TANG X Y,et al.Degradation of Rhodamine B by theα-MnO2/peroxymonosulfate system[J].Water,Air,Soil Pollut,2016,227(3):92.
[22]CHEN X Y,CHEN J W,QIAO X L,et al.Performance of nano-Co3O4/peroxymonosulfate system:kinetics and mechanism study using Acid Orange 7 as a model compound[J].Appl Catal,B,2008,80(1/2):116-121.
[23]张黎明,陈家斌,李文卫,等.碳纳米管活化过一硫酸盐降解金橙G过程及动力学[J].环境科学,2016,37(7):2601-2609.
[24]孙延花.活性炭活化过一硫酸盐及其在处理染料废水中的应用研究[D].武汉:华中科技大学,2012.
[25]王忠明,陈家斌,张黎明,等.活性炭负载Co3O4活化过一硫酸盐降解金橙G[J].环境科学,2016,37(7):2591-2600.
[26]ZENG T,ZHANG X L,WANG S H,et al.Spatial confinement of a Co3O4 catalyst in hollow metal-organic frameworks as a nanoreactor for improved degradation of organic pollutants[J].Environ Sci Technol,2015,49(4):2350-2357.
[27]HU P D,LONG M C.Cobalt-catalyzed sulfate radicalbased advanced oxidation:a review on heterogeneous catalysts and applications[J].Appl Catal,B,2016,181:103-117.
[28]李勇,金伟,王卫刚,等.零价铁/过硫酸盐体系降解有机污染物的研究进展[J].水处理技术,2014,40(3):18-21.
[29]OH S Y,KANG S G,CHIU P C.Degradation of2,4-dinitrotoluene by persulfate activated with zerovalent iron[J].Sci Total Environ,2010,408(16):3464-3468.
[30]TANG Y,THORN R L,MAULDINⅢR P,et al.Kinetics and spectroscopy of the SO4-radical in aqueous solution[J].J Photochem Photobiol,A,1988,44(3):243-258.
[31]LIANG C J,WANG Z S,BRUELL C J.Influence of pH on persulfate oxidation of TCE at ambient temperatures[J].Chemosphere,2007,66(1):106-113.
[32]SUN H Q,LIU S Z,ZHOU G L,et al.Reduced graphene oxide for catalytic oxidation of aqueous organic pollutants[J].ACS Appl Mater Interfaces,2012,4(10):5466-5471.
[33]娄晓祎.无机阴离子活化过硫酸盐氧化降解典型有机污染物的研究[D].上海:东华大学,2016.
[34]PANG Y X,LEI H Y.Degradation of p-nitrophenol through microwave-assisted heterogeneous activation of peroxymonosulfate by manganese ferrite[J].Chem Eng J,2016,287:585-592.
[35]ZHANG M,CHEN X Q,ZHOU H,et al.Degradation of p-nitrophenol by heat and metal ions co-activated persulfate[J].Chem Eng J,2015,264:39-47.
[36]万子谦,张静,张古承,等.过硫酸钠/钴离子/超声波协同降解酸性橙7[J].环境工程学报,2016,10(12):6887-6892.
[37]ANIPSITAKIS G P,DIONYSIOU D D.Degradation of organic contaminants in water with sulfate radicals generated by the conjunction of peroxymonosulfate with cobalt[J].Environ Sci Technol,2003,37(20):4790-4797.
[38]ZHOU Y,JIANG J,GAO Y,et al.Activation of peroxymonosulfate by benzoquinone:a novel nonradical oxidation process[J].Environ Sci Technol,2015,49(21):12941-12950.
[39]FENG Y,WU D L,DENG Y,et al.Sulfate radicalmediated degradation of sulfadiazine by CuFeO2rhombohedral crystal-catalyzed peroxymonosulfate:synergistic effects and mechanisms[J].Environ Sci Technol,2016,50(6):3119-3127.
[40]ZHANG T,ZHU H B,CROUéJ P.Production of sulfate radical from peroxymonosulfate induced by a magnetically separable CuFe2O4 spinel in water:efficiency,stability,and mechanism[J].Environ Sci Technol,2013,47(6):2784-2791.
[41]YANG Y,JIANG J,LU X L,et al.Production of sulfate radical and hydroxyl radical by reaction of ozone with peroxymonosulfate:a novel advanced oxidation process[J].Environ Sci Technol,2015,49(12):7330-7339.
[42]LEE H S,KIM H I,WEON S H,et al.Activation of persulfates by graphitized nanodiamonds for removal of organic compounds[J].Environ Sci Technol,2016,50(18):10134-10142.
[43]YAO Y J,YANG Z H,SUN H Q,et al.Hydrothermal synthesis of Co3O4-graphene for heterogeneous activation of peroxymonosulfate for decomposition of phenol[J].Ind Eng Chem Res,2012,51(46):14958-14965.
[44]YAO Y J,CAI Y M,LU F,et al.Magnetic recoverable MnFe2O4 and MnFe2O4-graphene hybrid as heterogeneous catalysts of peroxymonosulfate activation for efficient degradation of aqueous organic pollutants[J].J Hazard Mater,2014,270:61-70.
[45]LIANG H W,SUN H Q,PATEL A,et al.Excellent performance of mesoporous Co3O4/MnO2 nanoparticles in heterogeneous activation of peroxymonosulfate for phenol degradation in aqueous solutions[J].Appl Catal,B,2012,127:330-335.
[46]CAI C,ZHANG H,ZHONG X,et al.Ultrasound enhanced heterogeneous activation of peroxymonosulfate by a bimetallic Fe-Co/SBA-15 catalyst for the degradation of OrangeⅡin water[J].J Hazard Mater,2015,283:70-79.
[47]REN Y M,LIN L Q,MA J,et al.Sulfate radicals induced from peroxymonosulfate by magnetic ferrospinel MFe2O4(M=Co,Cu,Mn,and Zn)as heterogeneous catalysts in the water[J].Appl Catal,B,2015,165:572-578.
[48]TAN C Q,GAO N Y,DENG Y,et al.Radical induced degradation of acetaminophen with Fe3O4 magnetic nanoparticles as heterogeneous activator of peroxymonosulfate[J].J Hazard Mater,2014,276:452-460.
[49]XU L J,CHU W,GAN L.Environmental application of graphene-based CoFe2O4 as an activator of peroxymonosulfate for the degradation of a plasticizer[J].Chem Eng J,2015,263:435-443.
[50]SAPUTRA E,MUHAMMAD S,SUN H Q,et al.Shape-controlled activation of peroxymonosulfate by single crystalα-Mn2O3 for catalytic phenol degradation in aqueous solution[J].Appl Catal,B,2014,154/155:246-251.
[51]YAO Y J,CAI Y M,WU G D,et al.Sulfate radicals induced from peroxymonosulfate by cobalt manganese oxides(CoxMn3-xO4)for Fenton-like reaction in water[J].J Hazard Mater,2015,296:128-137.
[52]DING Y B,ZHU L H,HUANG A Z,et al.A heterogeneous Co3O4-Bi2O3 composite catalyst for oxidative degradation of organic pollutants in the presence of peroxymonosulfate[J].Catal Sci Technol,2012,2(9):1977-1984.
[53]LIU J,ZHAO Z W,SHAO P H,et al.Activation of peroxymonosulfate with magnetic Fe3O4-MnO2 coreshell nanocomposites for 4-chlorophenol degradation[J].Chem Eng J,2015,262:854-861.
[54]OH W D,DONG Z L,HU Z T,et al.A novel quasicubic CuFe2O4-Fe2O3 catalyst prepared at low temperature for enhanced oxidation of bisphenol A via peroxymonosulfate activation[J].J Mater Chem A,2015,3(44):22208-22217.
[2]DU Y C,MA W J,LIU P X,et al.Magnetic CoFe2O4nanoparticles supported on titanate nanotubes(Co Fe2O4/TNTs)as a novel heterogeneous catalyst for peroxymonosulfate activation and degradation of organic pollutants[J].J Hazard Mater,2016,308:58-66.
[3]CHENG X X,LIANG H,DING A,et al.Ferrous iron/peroxymonosulfate oxidation as a pretreatment for ceramic ultrafiltration membrane:control of natural organic matter fouling and degradation of atrazine[J].Water Res,2017,113:32-41.
[4]TAO Y F,NI Q,WEI M Y,et al.Metal-free activation of peroxymonosulfate by g-C3N4 under visible light irradiation for the degradation of organic dyes[J].RSCAdv,2015,5(55):44128-44136.
[5]YANG S Y,XIAO T,ZHANG J,et al.Activated carbon fiber as heterogeneous catalyst of peroxymonosulfate activation for efficient degradation of Acid Orange7 in aqueous solution[J].Sep Purif Technol,2015,143:19-26.
[6]史宸菲,贾淑敏,李雨濛,等.水稻秸秆生物炭-过硫酸盐去除水中p-硝基酚[J].化工环保,2017,37(6):632-637.
[7]WANG Y X,SUN H Q,ANG H M,et al.3D-hierarchically structured MnO2 for catalytic oxidation of phenol solutions by activation of peroxymonosulfate:structure dependence and mechanism[J].Appl Catal,B,2015,164:159-167.
[8]YU F K,ZHOU M H,ZHOU LEI,et al.A novel electro-Fenton process with H2O2 generation in a rotating disk reactor for organic pollutant degradation[J].Environ Sci Technol Lett,2014,1(7):320-324.
[9]PANDA N,SAHOO H,MOHAPATRA S.Decolourization of methyl orange using Fenton-like mesoporous Fe2O3-SiO2 composite[J].J Hazard Mater,2011,185(1):359-365.
[10]余丽胜,李晓霞,焦纬洲,等.超声协同Fenton法处理有机废水的研究进展[J].化工环保,2017,37(1):38-42.
[11]GOMATHI DEVI L,GIRISH KUMAR S,MOHANREDDY K,et al.Photo degradation of Methyl Orange an azo dye by advanced Fenton process using zero valent metallic iron:influence of various reaction parameters and its degradation mechanism[J].J Hazard Mater,2009,164(2/3):459-467.
[12]RAMIREZ J H,MALDONADO-HóDAR F J,PéREZ-CADENAS A F,et al.Azo-dye OrangeⅡdegradation by heterogeneous Fenton-like reaction using carbon-Fe catalysts[J].Appl Catal,B,2007,75(3/4):312-323.
[13]DUTTA K,MUKHOPADHYAY S,BHATTACHA-RJEE S,et al.Chemical oxidation of methylene blue using a Fenton-like reaction[J].J Hazard Mater,2001,84(1):57-71.
[14]朱思瑞,高乃云,鲁仙,等.热激活过硫酸盐氧化降解水中双酚A[J].中国环境科学,2017,37(1):188-194.
[15]相青青.碱活化过一硫酸盐及其在处理染料废水中的应用研究[D].武汉:中南民族大学,2012.
[16]HUANG K C,ZHAO Z Q,HOAG G E,et al.Degradation of volatile organic compounds with thermally activated persulfate oxidation[J].Chemosphere,2005,61(4):551-560.
[17]王萍.过硫酸盐高级氧化技术活化方法研究[D].青岛:中国海洋大学,2010.
[18]刘丽艳,孙至柔,叶文博,等.超声辅助Fe3O4活化过一硫酸盐降解酸性红B[J].化工进展,2016,35(11):3663-3668.
[19]刘丽艳,杨洋,刘芃宏,等.基于频谱分析方法的超声空化场三维重建及其分布[J].天津大学学报(自然科学与工程技术版),2014,47(11):962-966.
[20]王莹,陈家斌,张黎明,等.超声波协同活性碳纤维活化过一硫酸盐降解AO7[J].环境科学学报,2017,37(4):1404-1412.
[21]LIU C N,PAN D Y,TANG X Y,et al.Degradation of Rhodamine B by theα-MnO2/peroxymonosulfate system[J].Water,Air,Soil Pollut,2016,227(3):92.
[22]CHEN X Y,CHEN J W,QIAO X L,et al.Performance of nano-Co3O4/peroxymonosulfate system:kinetics and mechanism study using Acid Orange 7 as a model compound[J].Appl Catal,B,2008,80(1/2):116-121.
[23]张黎明,陈家斌,李文卫,等.碳纳米管活化过一硫酸盐降解金橙G过程及动力学[J].环境科学,2016,37(7):2601-2609.
[24]孙延花.活性炭活化过一硫酸盐及其在处理染料废水中的应用研究[D].武汉:华中科技大学,2012.
[25]王忠明,陈家斌,张黎明,等.活性炭负载Co3O4活化过一硫酸盐降解金橙G[J].环境科学,2016,37(7):2591-2600.
[26]ZENG T,ZHANG X L,WANG S H,et al.Spatial confinement of a Co3O4 catalyst in hollow metal-organic frameworks as a nanoreactor for improved degradation of organic pollutants[J].Environ Sci Technol,2015,49(4):2350-2357.
[27]HU P D,LONG M C.Cobalt-catalyzed sulfate radicalbased advanced oxidation:a review on heterogeneous catalysts and applications[J].Appl Catal,B,2016,181:103-117.
[28]李勇,金伟,王卫刚,等.零价铁/过硫酸盐体系降解有机污染物的研究进展[J].水处理技术,2014,40(3):18-21.
[29]OH S Y,KANG S G,CHIU P C.Degradation of2,4-dinitrotoluene by persulfate activated with zerovalent iron[J].Sci Total Environ,2010,408(16):3464-3468.
[30]TANG Y,THORN R L,MAULDINⅢR P,et al.Kinetics and spectroscopy of the SO4-radical in aqueous solution[J].J Photochem Photobiol,A,1988,44(3):243-258.
[31]LIANG C J,WANG Z S,BRUELL C J.Influence of pH on persulfate oxidation of TCE at ambient temperatures[J].Chemosphere,2007,66(1):106-113.
[32]SUN H Q,LIU S Z,ZHOU G L,et al.Reduced graphene oxide for catalytic oxidation of aqueous organic pollutants[J].ACS Appl Mater Interfaces,2012,4(10):5466-5471.
[33]娄晓祎.无机阴离子活化过硫酸盐氧化降解典型有机污染物的研究[D].上海:东华大学,2016.
[34]PANG Y X,LEI H Y.Degradation of p-nitrophenol through microwave-assisted heterogeneous activation of peroxymonosulfate by manganese ferrite[J].Chem Eng J,2016,287:585-592.
[35]ZHANG M,CHEN X Q,ZHOU H,et al.Degradation of p-nitrophenol by heat and metal ions co-activated persulfate[J].Chem Eng J,2015,264:39-47.
[36]万子谦,张静,张古承,等.过硫酸钠/钴离子/超声波协同降解酸性橙7[J].环境工程学报,2016,10(12):6887-6892.
[37]ANIPSITAKIS G P,DIONYSIOU D D.Degradation of organic contaminants in water with sulfate radicals generated by the conjunction of peroxymonosulfate with cobalt[J].Environ Sci Technol,2003,37(20):4790-4797.
[38]ZHOU Y,JIANG J,GAO Y,et al.Activation of peroxymonosulfate by benzoquinone:a novel nonradical oxidation process[J].Environ Sci Technol,2015,49(21):12941-12950.
[39]FENG Y,WU D L,DENG Y,et al.Sulfate radicalmediated degradation of sulfadiazine by CuFeO2rhombohedral crystal-catalyzed peroxymonosulfate:synergistic effects and mechanisms[J].Environ Sci Technol,2016,50(6):3119-3127.
[40]ZHANG T,ZHU H B,CROUéJ P.Production of sulfate radical from peroxymonosulfate induced by a magnetically separable CuFe2O4 spinel in water:efficiency,stability,and mechanism[J].Environ Sci Technol,2013,47(6):2784-2791.
[41]YANG Y,JIANG J,LU X L,et al.Production of sulfate radical and hydroxyl radical by reaction of ozone with peroxymonosulfate:a novel advanced oxidation process[J].Environ Sci Technol,2015,49(12):7330-7339.
[42]LEE H S,KIM H I,WEON S H,et al.Activation of persulfates by graphitized nanodiamonds for removal of organic compounds[J].Environ Sci Technol,2016,50(18):10134-10142.
[43]YAO Y J,YANG Z H,SUN H Q,et al.Hydrothermal synthesis of Co3O4-graphene for heterogeneous activation of peroxymonosulfate for decomposition of phenol[J].Ind Eng Chem Res,2012,51(46):14958-14965.
[44]YAO Y J,CAI Y M,LU F,et al.Magnetic recoverable MnFe2O4 and MnFe2O4-graphene hybrid as heterogeneous catalysts of peroxymonosulfate activation for efficient degradation of aqueous organic pollutants[J].J Hazard Mater,2014,270:61-70.
[45]LIANG H W,SUN H Q,PATEL A,et al.Excellent performance of mesoporous Co3O4/MnO2 nanoparticles in heterogeneous activation of peroxymonosulfate for phenol degradation in aqueous solutions[J].Appl Catal,B,2012,127:330-335.
[46]CAI C,ZHANG H,ZHONG X,et al.Ultrasound enhanced heterogeneous activation of peroxymonosulfate by a bimetallic Fe-Co/SBA-15 catalyst for the degradation of OrangeⅡin water[J].J Hazard Mater,2015,283:70-79.
[47]REN Y M,LIN L Q,MA J,et al.Sulfate radicals induced from peroxymonosulfate by magnetic ferrospinel MFe2O4(M=Co,Cu,Mn,and Zn)as heterogeneous catalysts in the water[J].Appl Catal,B,2015,165:572-578.
[48]TAN C Q,GAO N Y,DENG Y,et al.Radical induced degradation of acetaminophen with Fe3O4 magnetic nanoparticles as heterogeneous activator of peroxymonosulfate[J].J Hazard Mater,2014,276:452-460.
[49]XU L J,CHU W,GAN L.Environmental application of graphene-based CoFe2O4 as an activator of peroxymonosulfate for the degradation of a plasticizer[J].Chem Eng J,2015,263:435-443.
[50]SAPUTRA E,MUHAMMAD S,SUN H Q,et al.Shape-controlled activation of peroxymonosulfate by single crystalα-Mn2O3 for catalytic phenol degradation in aqueous solution[J].Appl Catal,B,2014,154/155:246-251.
[51]YAO Y J,CAI Y M,WU G D,et al.Sulfate radicals induced from peroxymonosulfate by cobalt manganese oxides(CoxMn3-xO4)for Fenton-like reaction in water[J].J Hazard Mater,2015,296:128-137.
[52]DING Y B,ZHU L H,HUANG A Z,et al.A heterogeneous Co3O4-Bi2O3 composite catalyst for oxidative degradation of organic pollutants in the presence of peroxymonosulfate[J].Catal Sci Technol,2012,2(9):1977-1984.
[53]LIU J,ZHAO Z W,SHAO P H,et al.Activation of peroxymonosulfate with magnetic Fe3O4-MnO2 coreshell nanocomposites for 4-chlorophenol degradation[J].Chem Eng J,2015,262:854-861.
[54]OH W D,DONG Z L,HU Z T,et al.A novel quasicubic CuFe2O4-Fe2O3 catalyst prepared at low temperature for enhanced oxidation of bisphenol A via peroxymonosulfate activation[J].J Mater Chem A,2015,3(44):22208-22217.