TiO2/UV/O2和TiO2/UV/N2体系降解水中对氯硝基苯

doi:10.7517/j.issn.1674-0475.2007.04.296

影像科学与光化学 ›› 2007, Vol. 25 ›› Issue (4): 296-305.DOI: 10.7517/j.issn.1674-0475.2007.04.296

TiO₂/UV/O₂和TiO₂/UV/N₂体系降解水中对氯硝基苯

叶苗苗, 陈忠林, 沈吉敏, 贲岳

哈尔滨工业大学, 市政环境工程学院, 黑龙江, 哈尔滨, 150090

收稿日期:2006-11-27 修回日期:2007-03-12 出版日期:2007-07-23 发布日期:2007-07-23
通讯作者: 陈忠林, 通讯地址:哈尔滨工业大学二学区2606号.
基金资助:
国家自然科学基金项目(50008004).

The Degradation of p-Nitrochlorobenzene in Aqueous Solution by TiO₂/UV/O₂ and TiO₂/UV/N₂ System

YE Miao-miao, CHEN Zhong-lin, SHEN Ji-min, BEN Yue

Harbin Institute of Technology, School of Municipal and Environmental Engineering, Harbin 150090, Heilongjiang, P.R.China

Received:2006-11-27 Revised:2007-03-12 Online:2007-07-23 Published:2007-07-23

摘要/Abstract

摘要： 以商用TiO₂P25为催化剂,分别在TiO₂/UV/O₂和TiO₂/UV/N₂两种体系下进行降解对氯硝基苯(pCNB)试验.采用ESR对两种体系下光催化反应形成的·OH进行测定,利用LC-MS对两种体系下反应形成的中间产物进行了定性和定量分析,最后对pCNB降解过程中氯和硝基的存在形式进行了研究.结果表明:TiO₂/UV/O₂体系的催化降解效果要明显优于TiO₂/UV/N₂体系;两种反应体系都有·OH产生,并且TiO₂/UV/O₂体系产生的·OH的量多于TiO₂/UV/N₂体系产生的·OH的量;TiO₂/UV/O₂体系形成的中间产物的种类要多于TiO₂/UV/N₂体系形成的,苯环上的氢、氯、硝基均可被·OH取代形成对硝基酚(pNP)、5-氯-2-硝基酚(5-C-2-PN)等酚类物质;两种体系下均有Cl^-和NO₂^-存在,其中Cl^-生成势与pCNB的去除势一致,只有TiO₂/UV/O₂体系中存在NO₃^-.

关键词: 二氧化钛, 对氯硝基苯, 光催化, 羟基自由基, ESR

Abstract: The photocatalytic degradation of p-nitrochlorobenzene(pCNB) was studied using two different catalytic system——TiO₂/UV/O₂ and TiO₂/UV/N₂.The main intermediate products in the two systems were identified and quantified by means of HPLC-MS,the modality of chlorine and nitryl on pCNB was studied during the photocatalytic degradation reaction,at last, the hydroxyl radicals in these two different catalytic systems were detected.Results showed that the efficiency of the degradation of pCNB in TiO₂/UV/O₂ system is much better than that of TiO₂/UV/N₂ system;the hydroxyl radicals was formed in both of the two systems,but the quantity of the hydroxyl radicals is much more than that of TiO₂/UV/N₂ system;the main intermediate products in TiO₂/UV/O₂ system is much more than that of TiO₂/UV/N₂ system,and p-nitrophenol(pNP),p-chlorophenol(pCP),5-chlor-2-nitrophenol(5-C-2-PN) were the same intermediate products in both of these two systems;Cl^-and NO₂^-were detected in both of these two reaction systems,and NO₃^-was detected only in the TiO₂/UV/O₂ system.

Key words: titanium oxide, p-nitrochlorobenzene, photocatalysis, hydroxyl radicals, ESR

中图分类号:

X703
O64

叶苗苗, 陈忠林, 沈吉敏, 贲岳. TiO₂/UV/O₂和TiO₂/UV/N₂体系降解水中对氯硝基苯[J]. 影像科学与光化学, 2007, 25(4): 296-305.

YE Miao-miao, CHEN Zhong-lin, SHEN Ji-min, BEN Yue. The Degradation of p-Nitrochlorobenzene in Aqueous Solution by TiO₂/UV/O₂ and TiO₂/UV/N₂ System[J]. Imaging Science and Photochemistry, 2007, 25(4): 296-305.

参考文献

[1] 徐根良,徐秀珠.环境中痕量特殊有机污染物的高效液相色谱测定[J].浙江大学学报,1999,33(3):323-327.Xu G L,Xu X Z.Determination of trace organic pollutantsinthe environment by high-performanceliquid chromato-graphy[J].Journal of Zhejiang University,1999,33(3):323-327.
[2] Liang C.Market analysis and development projectionsfor chlorobenzene product series[J].China Chemical Reporter,2004,26:20-24.
[3] Travlos GS,Mahler J,Ragan HA,et al.Thirteen-weekinhalationtoxicity of 2-and 4-chloronitrobenzenein F344/Nrats and B6C3F1 mice[J].Fundamental and Applied Toxicology,1996,30(1):75-92.
[4] Weisburger E K,Russfield F,Homburger J,et al.Testing of twenty one environmental aromatic amines or deriva-tives for long termtoxicity or carcincgenicity[J].Environ.Pathol.Texicol.,1978,2:325-356.
[5] Andreozzi R,Caprio V,Insola A,et al.The ozonation of pyruvic acidin aqueous solutions catalyzed bysuspended anddissolved manganese[J].Water Research,1998,(5):1492-1496.
[6] Hisashi H,Toyotoshi U.Photocatalytic activity of ultrafine rutil in methanol-water solution and dependence of activityon particle size[J].Chemical Physicas Letter,1984,106(3),229-231.
[7] Iis S,Mitsuru W,Sadao M,et al.Efficient TiO₂powder and fil m photocatalysts with rutile crystal structure[J].Chemistry Letters,1996,(1):69-70.
[8] Salah R,Pascal W,Sylvie N.Phototransformation of triclosaninthe presence of TiO₂in aqueoussuspension:mecha-nistic approach[J].Applied Catalysis B:Environmental,2006,66:119-125.
[9] Kosaka1 K,Yamada1 H,Shishida K,et al.Evaluation of the treatment performance of amultistage ozone/hydrogenperoxide process by decomposition by-products[J].Water Research,2001,35(10):3587-3594.
[10] Buttner G R.Spin trapping:ESR parameters of spin adducts Free Radical Biol[J].Med.,1987,(3):259-303.
[11] Gratzel C K,Jirousek M,Gratzel M.Decomposition of organophosphorous compounds on photoactivated TiO₂sur-faces[J].Journal of Molecular Catalysis,1990,60:375-387.
[12] Tang WZ,Huang P C.The effect of chlorine position of chlorinated phenols ontheir dechlorination kinetics by Fen-ton’s reagent[J].Waste Management,1995,15(8):612-622.
[13] Scheck C K,Fri mmel F F.Degradation of phenol andsalicylic acid by ultraviolet radiation hydrogen peroxide oxygen[J].Water Research,1995,29(10):2346-2352.

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TiO₂/UV/O₂和TiO₂/UV/N₂体系降解水中对氯硝基苯

The Degradation of p-Nitrochlorobenzene in Aqueous Solution by TiO₂/UV/O₂ and TiO₂/UV/N₂ System

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