Photocatalytic Degradation of Organic Pigment and Surfactant DBS

doi:10.7517/j.issn.1674-0475.2009.04.248

Abstract

Abstract: Photocatalytic degradation of surfactant sodium dodecyl benzenesulfonate(DBS) and organic pigment Light Fast Scarlet BBN(BBN) was investigated using TiO₂ as photocatalyst in aqueous solution under ultraviolet light irradiation.Degradation rate and the interaction mechanism of DBS and BBN were discussed.The results show that the degradation of the bicomponents depends on pH and substrate concentraction obviously.The degradation rate of DBS was faster in alkaline medium,but the discoloration rate of BBN was faster in acidic medium.The adsorption of BBN and DBS by TiO₂ in acid medium was better than inalkaline medium or in neutral condition.In the system of BBN/DBS,the degradation rate of BBN was slightly decreased by adding DBS.When the concentration of DBS was 0.42 g/L,the degradation rate of BBN was the fastest;while the concentration of DBS was 0.042 g/L,the degradation was slightly fast;when the concentration of DBS was 2.1 g/L,the degradation was the lowest.DBS was degradated in the course of BBN degradation, and the degradation rate of DBS was slightly increased by adding DBS.

Key words: light fast scarlet BBN, surfactant, TiO₂, photocatalysis, adsorption

CLC Number:

O643

ZHANG Tian-yong, WANG Zhao, FAN Qiao-fang, YANG Qiu-sheng, LU Zhou, LI Xiao-xu. Photocatalytic Degradation of Organic Pigment and Surfactant DBS[J]. Imaging Science and Photochemistry, 2009, 27(4): 248-255.

References

[1] 高濂,郑珊,张青红.纳米氧化钛光催化材料及应用[M].北京:化学工业出版社,2002,261-285.Crao L,Zhen S,Zhang Q H.Nano-TiO₂ Photocatalyst and Its Application[M].Beijing:Chemical Industry Press,2002,261-285.
[2] Zielinska B,Grzechulska J,Morawski A W.Photocatalytic decomposition of textile dyes on TiO₂-Tytanpol A11 and TiO₂-Degussa P25[J].J.Photochem.Photobiol.A:Chem.,2003,157:65-70.
[3] Liu G M,Li X Z,Zhao J C.Photooxidation pathway of sulforhodamine-B.Dependence on the adsorption mode on TiO₂ exposed to visible light radiation[J].Environ.Sci.Techn01.,2000,34:3982-3990.
[4] Konstantinou I K,Albanis T A.Metolaehlor photoeatalytic degradation using TiO₂ photocatalysts[J].Appl.Catal.B:Environ.,2004,49:195-205.
[5] Aguedach A,Brosillon S,Morvan J,et al.Photocatalytic degradation of azo-dyes reactive black 5 and reactive yellow 145 in water over a newly deposited titanium dioxide[J].Appl.Catal.B:Environ.,2005,57:55-62.
[6] Zhao J C,Wu T X,Wu K Q,et al.Photoassisted degradation of dye pollutants.3.Degradation of cationic dye rhodamine B in aqueous dispersions under visible light irradiation:Evidence for the need of substrate adsorption on TiO₂particles[J].Environ.Sci.Techn01.,1998,32(16):2394-2400.
[7] Qu P,Zhao J C,Shen T,et al.Enhancement of the photoinduced electron transfer from cationic dyes to eolloiodal TiO₂ particles by addition of an anionic surfactant in media[J].Colloids and Surfaces A:Physicochemical and Engineering Aspects,1998,138:39-50.
[8] 文晟,赵进才,盛国英,等.菲在TiO₂存在下的光降解研究[J].感光科学与光化学(影像科学与光化学),2002,20(6):405-409.Wen S,Zhao J C,Sheng G Y,et al.Photodegradation of phenanthrene catalyzed by TiO₂[J].Photographic Science and Photochemistry(Imaging Science and Photochemistry),2002,20(6):405-409.
[9] Cho Y,Kyung H,Choi W.Visible light activity of TiO₂ for the phomreduction of CCl₄ and Cr(VI)in the presence of nonionie surfactant(Brij)[J].Appl.Catal.B:Environ.,2004,52:23-32.
[10] 张天永,朱卅丹,张友兰,等.添加剂对有机颜料光催化降解的影响[J].催化学报,2004,25(4):293-296.Zhang T Y,Zhu D D,Zhang Y L,et al.Effects of additives on photoeatalytie degradation of pigment brilliant red 6B[J].Chin.J.Catal.,2004,25(4):293-296.
[11] 张天永,朱卅丹,张友兰,等.阳离子表而活性剂对有机颜料光催化降解的影响[J].催化学报,2005,26(7):577-581.Zhang T Y,Zhu D D,Zhang Y L,et al.Effect of cationic surfactants on photocatalytic degradation of organic pigment brilham red 6B[J].Chin.J.Catal.,2005,26(7):577-581.
[12] 张天永,范巧芳,曾淼,等.耐晒大红BBN与表面活性剂双组分光催化降解[J].物理化学学报,2007,23(11):1803-1807.Zhang T Y,Fan Q F,Zeng M,et al.Photoeatalytic degradation of light fast scarlet BBN and surfactant bieomponents[J].Acta Phys.-Chim.Sina.,2007,23(11):1803-1807.
[13] 蒋伟川,王琪全.水溶液中十二烷基苯磺酸钠的半导体光催化降解的研究[J].环境科学,1994,15(6):1-3.Jiang W C,Wang Q Q.Study on semiconductor photoeatalytic degradation of aqueous sodium of dodecylbenzenesulfonate[J].Chin.J.Environ.Sci.,1994,16(2):15-18.
[14] 冯良荣,谢卫国,吕绍洁等.TiO₂光催化氧化十二烷基苯磺酸钠[J].环境污染治理技术与设备,2001,2(2):14-20.Feng L R,Xie W G,Lu S J,et al.Photocatalytic oxidation of sodium dodeeyl bemenesulfomte using TiO₂ as catalyst[J].Tech.Equip.Environ.Poll.Contr.,2001,2(2):14-20.
[15] Zhao J,Hidaka H,Takamura A,et al.Photodegradation of surfactants.11.zeta-Potential measurements in the photocatalytic oxidation of surfactans in aqueous titania dispersions[J].Langmuir,1993,9(7):1646-1650.
[16] Dube S,Ran N N.Rate parameter independence on the organic reactant:a study of adsorption and photocatalytic oxidation of surfactants using MO_3-TiO₂[J].J.Photochem.Photobiol.A:Chem.,1996,93:71-77.