UV/H_2O_2工艺降解水中污染物的动力学研究进展
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摘要
介绍了目前最重要的商用高级氧化工艺之一的UV/H_2O_2工艺,叙述了UV/H_2O_2工艺动力学研究进展,认为目前此方面的研究仍有所欠缺,鉴于此,将分别从动力学参数及动力学模型2方面对UV/H_2O_2工艺降解污染物的动力学特性进行了探讨。以UV曝辐量为主线,分别阐述并比较了不同反应器中UV曝辐量的测定、基于UV光量子剂量的动力学参数及动力学模型等,指出了UV曝辐量对于光化学反应的重要性,分析表明该模型的建立对单一目标污染物的模拟和预测有较好效果。认为需进一步探讨研究,找到最适合的动力学模型;还应开发高效低耗的新型光源、反应器。
The UV/H_2O_2 process, one of the most important commercial advanced oxidation processes was introduced, and the research progress of UV/H_2O_2 process kinetics was described, it is considered that there is a lack of research in this area. In view of this, the kinetics characteristic of pollutants degradation by UV/H_2O_2 process was discussed in two aspects: kinetic parameters and kinetic models. Taking UV exposure radiation as the main line,the determination of UV exposure radiation in different reactors, the kinetic parameters based on UV light quantum dosage and the kinetic model were respectively described and compared. The importance of UV exposure radiation for photochemical reaction was pointed out. The analysis indicated that the establishment of model has a good effect for a single target pollutant simulation and prediction. It is considered that further research is needed to find the most suitable kinetic model and new light source and reactor with high efficiency and low consumption should be developed.
The UV/H_2O_2 process, one of the most important commercial advanced oxidation processes was introduced, and the research progress of UV/H_2O_2 process kinetics was described, it is considered that there is a lack of research in this area. In view of this, the kinetics characteristic of pollutants degradation by UV/H_2O_2 process was discussed in two aspects: kinetic parameters and kinetic models. Taking UV exposure radiation as the main line,the determination of UV exposure radiation in different reactors, the kinetic parameters based on UV light quantum dosage and the kinetic model were respectively described and compared. The importance of UV exposure radiation for photochemical reaction was pointed out. The analysis indicated that the establishment of model has a good effect for a single target pollutant simulation and prediction. It is considered that further research is needed to find the most suitable kinetic model and new light source and reactor with high efficiency and low consumption should be developed.
引文
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[2]JUNG C,SON A,HER N,et al.Removal of endocrine disrupting compounds,pharmaceuticals,and personal care products in water using carbon nanotubes:a review[J].Journal of Industrial and Engineering Chemistry,2015,27:1-11.
[3]POSTIGO C,COJOCARIU C I,RICHARDSON S D,et al.Characterization of iodinated disinfection by-products in chlorinated and chloraminated waters using Orbitrap based gas chromatography-mass spectrometry[J].Analytical and Bioanalytical Chemistry,2016,408(13):3401-3411.
[4]WANG R,TANG J,XIE Z,et al.Occurrence and spatial distribution of organophosphate ester flame retardants and plasticizers in 40rivers draining into the Bohai Sea,north China[J].Environmental Pollution,2015,198:172-178.
[5]BELTRAN F J,OVEJERO G,GARCIA-ARAYA J F,et al.Oxidation of polynuclear aromatic hydrocarbons in water.2.UV radiation and ozonation in the presence of UV radiation[J].Industrial&Engineering Chemistry Research,1995,34(5):1607-1615.
[6]倪明.邻苯二甲酸酯的污染现状及去除研究进展[J].水处理技术,2010,36(4):9-13.
[7]夏海燕,王启山,高超.UV/H2O2工艺在水处理中的应用研究进展[J].水处理技术,2010,36(5):10-13.
[8]BOLTON J R,STEFAN M I.Fundamental photochemical approach to the concepts of fluence(UV dose)and electrical energy efficiency in photochemical degradation reactions[J].Research on Chemical Intermediates,2002,28(7/9):857-870.
[9]LIAN J,BEN W,LI M,et al.UV photolysis kinetics of sulfonamides in aqueous solution based on optimized fluence quantification[J].Water Research,2015,75:43-50.
[10]BOLTON J R,MAYOR-SMITH I,LINDEN K G.Rethinking the concepts of fluence(UV dose)and fluence rate:The importance of photon-based units-a systemic review[J].Photochemistry and Photobiology,2015,91(6):1252-1262.
[11]LIAN J,QIANG Z,LI M,et al.UV photolysis kinetics of sulfonamides in aqueous solution based on optimized fluence quantification[J].Water Research,2015,75:43-50.
[12]PEREIRA V J,WEINBERG H S,LINDEN K G,et al.UV degradation kinetics and modeling of pharmaceutical compounds in laboratory grade and surface water via direct and indirect photolysis at 254 nm[J].Environmental Science&Technology,2007,41(5):1682-1688.
[13]KIM I,YAMASHITA N,TANAKA H.Photodegradation of pharmaceuticals and personal care products during UV and UV/H2O2treatments[J].Chemosphere,2009,77(4):518-525.
[14]KAUR I,JIA W,KOPRESKI R P,et al.Substituent effects in pentacenes:Gaining control over HOMO-LUMO gaps and photooxidative resistances[J].Journal of the American Chemical Society,2008,130(48):16274-16286.
[15]ZEPP R G,SCHLOTZHAUER P F,SINK R M.Photosensitized transformations involving electronic energy transfer in natural waters:Role of humic substances[J].Environmen tal Science&Technology,1985,19(1):74-81.
[16]ZEPP R G,WOLFE N L,BAUGHMAN G L,et al.Singlet oxygen in natural waters[J].Nature,1977,267(5610):421.
[17]HAAG W R,GASSMAN E.Singlet oxygen in surface waters-Part I:Furfuryl alcohol as a trapping agent[J].Chemosphere,1984,13(5/6):631-640.
[18]HAAG W R,GASSMAN E.Singlet oxygen in surface waters-Part II:Quantum yields of its production by some natural humic materials as a function of wavelength[J].Chemosphere,1984,13(5/6):641-650.
[19]MILL T,HENDRY D G,RICHARDSON H.Free-radical oxidants in natural waters[J].Science,1980,207(4433):886-887.
[20]ZAFIRIOU O C,TRUE M B.Nitrate photolysis in seawater by sunlight[J].Marine Chemistry,1979,8(1):33-42.
[21]GOLANOSKI K S,FANG S,DEL VECCHIO R,et al.Investigating the mechanism of phenol photooxidation by humic substances[J].Environmental Science&Technology,2012,46(7):3912-3920.
[22]BOREEN A L,ARNOLD W A,MCNEILL K.Photochemical fate of sulfa drugs in the aquatic environment:sulfa drugs containing five-membered heterocyclic groups[J].Environmental Science&Technology,2004,38(14):3933-3940.
[23]EVANS M G,URI N.The dissociation constant of hydrogen peroxide and the electron affinity of the HO2radical[J].Transactions of the Faraday Society,1949,45:224-230.
[24]BUXTON G V,GREENSTOCK C L,HELMAN W P,et al.Critical review of rate constants for reactions of hydrated electrons,hydrogen atoms and hydroxyl radicals(HO·/O·-)in aqueous solution[J].Journal of Physical and Chemical Reference Data,1988,17(2):513-886.
[25]CHRISTENSEN H,SEHESTED K,Corfitzen H.Reactions of hydroxyl radicals with hydrogen peroxide at ambient and elevated temperatures[J].The Journal of Physical Chemistry,1982,86(9):1588-1590.
[26]ROSENFELDT E J,LINDEN K G.The ROH,UV concept to characterize and the model UV/H2O2process in natural waters[J].Environmental Science&Technology,2007,41(7):2548-2553.
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