Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/12280
Title: Reaction kinetics of photocatalytic degradation of sulfosalicylic acid using TiO2 microspheres
Authors: Wang, C
Zhang, X
Liu, H
Li, X
Li, W
Xu, H
Keywords: Kinetics
Photocatalysis
Sulfosalicylic acid
TiO2 microspheres
Issue Date: 2009
Publisher: Elsevier
Source: Journal of hazardous materials, 2009, v. 163, no. 2-3, p. 1101-1106 How to cite?
Journal: Journal of hazardous materials 
Abstract: The photocatalytic (PC) degradation kinetics of sulfosalicylic acid (SSA) at different pH using TiO2 microspheres were elucidated by modeling. The resultant model had special consideration of adsorption and pH. The adsorption isotherms showed that the LC/MS2-identified intermediates were weakly adsorbed on the TiO2 microspheres, thus their adsorption was neglected in the modeling. By contrast, the SSA was significantly adsorbed, thus its adsorption retained as an item in the model. Consequently, a non-first-order model was obtained. Through the modeling, it was elucidated that the reaction rate increased non-linearly with the SSA adsorption equilibrium constant. Meanwhile, it was elucidated that a pH increase favored the hydroxyl radical production to accelerate the SSA degradation, while impeded the SSA adsorption to slower it, hence a neutral pH caused the fastest SSA degradation.
URI: http://hdl.handle.net/10397/12280
ISSN: 0304-3894
EISSN: 1873-3336
DOI: 10.1016/j.jhazmat.2008.07.064
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