Degradation of Butylparaben by Ozonation and UV/TiO₂ Processes

Abstract:

Butylparaben is widely used as a bactericide and as an antimicrobial agent in the formation of personal care products (PCPs). Owing to a certain estrogenic activity, a possible relationship with breast cancer has been proved by many researchers. The removal efficiency of butylparaben in aqueous solutions was studied using advanced oxidation processes (AOPs). These results indicate that the reaction rates for the ozonation of butylparaben in water are higher under the concentration of ozone 5 mg/L in alkaline condition. The original concentration of butylparaben almost degraded within 50, 30, and 20 min at ozone concentrations of 1, 3, and 5 mg/L, respectively at pH 11 runs. The ozonation imposed butylparaben with a time dependence that appeared to follow pseudo first-order kinetics. The original butylparaben was degraded 50 %, 40%, 35%, and 32% within 24 hr at pH 3, 6, 9, and 11 respectively by UV/TiO₂ process in the O2-sparged concentration of 30 mg/L. The rate constants are 0.045, 0.043, 0.025, and 0.020 hr-1 at the butylparaben concentrations of 10.30, 20.60, 30.90, and 41.20 μM, respectively.

• Periodical: Advanced Materials Research (Volumes 488-489)
• Pages: 159-163
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.488-489.159
• Online since: March 2012
• Authors: Li Chin Chuang, Chin Hsiang Luo, Ming Chieh Chuang, Miao Chi Wang
• Keywords: Advanced Oxidation Process (AOP), Butylparaben, Ozonation, Pharmaceuticals, TiO₂

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