Degradation of Sulfa Pharmaceuticals in Aquatic Environment by O3 and UV/TiO2 Processes

Abstract:

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The removal efficiencies of sulfamerazine (SMR) and sulfamethoxypyridazine (SMP) in aqueous solutions were studied using advanced oxidation technologies. The results show similar removal kinetics for two sulfa pharmaceuticals and that complete removal of all is achieved within 90 min of ozonation at the concentration of O3 (1 mgL-1) without controlling the pH. The rate constants were calculated as 0.0143 and 0.0113 min-1 for SMR and SMP, respectively. The catalysts exhibited a superior removal efficiency of SMP to those of SMR with a TiO2 concentration of 2.0 gL-1. The disappearance of these two sulfa pharmaceuticals follows a pseudo-first-order kinetics according to the Langmuir-Hinshelwood (L-H) model. The rate constants were calculated as 5 × 10-3 and 6 × 10-4 min-1 for SMR and SMP, respectively. Advanced oxidation processes (AOPs), such as O3 and UV/TiO2 processes should be an effective treatment for removing these sulfa pharmaceuticals.

Info:

Periodical:

Advanced Materials Research (Volumes 255-260)

Edited by:

Jingying Zhao

Pages:

4222-4226

DOI:

10.4028/www.scientific.net/AMR.255-260.4222

Citation:

L. C. Chuang et al., "Degradation of Sulfa Pharmaceuticals in Aquatic Environment by O3 and UV/TiO2 Processes", Advanced Materials Research, Vols. 255-260, pp. 4222-4226, 2011

Online since:

May 2011

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$35.00

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