Microcystin-LR Degradation of Titanium Dioxide Process by Solar/ S-Doped


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The removal efficiency of microcystin-LR in water and the influencing factors by combined process of solar irradiation and S-doped TiO2 were studied in detail, in which S-doped TiO2 photo-catalyst with high sunlight activity was prepared by acid catalyzed hydrolysis method using thiourea as sulfur source. The experiment results showed that MC-LR could be more effectively oxidized by the solar/S-doped TiO2 process than by solar/ TiO2 process, whose removal effect were about 70% and 55% after 40 min’s irradiation, respectively. Pseudo-first-order model could be used to simulate the oxidation process. Degradation rate could be greatly affected by the concentration of H2O2, the optimum concentration for the system of solar/S-doped TiO2 was found to be 20mg/L, which was 5mg/L higher than that of solar/TiO2 system. Humic acids decreased the degradation rate, and solar/S-doped TiO2 process more easily affected, for the humic acids could not only compete with molecular MC-LR for radicals but also adsorb part of sunlight which can excite radical with TiO2.



Edited by:

Dunwen Zuo, Hun Guo, Hongli Xu, Chun Su, Chunjie Liu and Weidong Jin






C. Liu et al., "Microcystin-LR Degradation of Titanium Dioxide Process by Solar/ S-Doped", Applied Mechanics and Materials, Vol. 33, pp. 327-331, 2010

Online since:

October 2010




[1] S.J. Hoeger, D. Schmid, J.F. Blom, B. Ernst, D.R. Dietrich: Environ. Sci. Technol. Vol. 41 (2007) , pp.2609-2616.

[2] Momania F A., Smith D W., El-Din M G: Journal of Hazardous Materials Vol. 150 (2008), pp.238-249.

[3] Ao C. H., Leung M. K. H., Lam R. C. W., et al: Chemical Engineering Vol. 129 (2007), pp.153-159.

[4] T. Ohno, M. Akiyoshi, T. Umebayashi, et al: Appl. Catal. A: Gen Vol. 265 (2004), pp.115-123.

[5] S.U.M. Khan, M. Al-Shahry W.B. Ingler Jr: Science Vol. 297 (2002), pp.2243-2245.

[6] S.X. Liu, X.Y. Chen, X. Chen: Chin. J. Catal. Vol. 27 (2006), pp.697-702.

[7] S. X. Liu, X.Y. Chen: J of Hazardous Materials Vol. 152 (2008), pp.48-55.

[8] Shephard GS, Stockenstr . om S, De Villiers D, et al: Toxicon Vol. 36 (1998), p.1895-(1901).

[9] Prousek J: Photochemical Processes: Chemistry Vol. 90(1996) No. 5, pp.307-315.

[10] Malato S, Blanco J, Maldonado M I: Applied Catalyst B: Environmental Vol. 28 (2000)No. 1, pp.163-174.

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