Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/9987
Title: Riboflavin-sensitized photooxidation of phenylurea herbicide monuron in aqueous peroxide solution
Authors: Chan, KH
Chu, W 
Keywords: Hydrogen peroxide
Monuron
Photooxidation
Photosensitization
Riboflavin
Issue Date: 2009
Publisher: Elsevier
Source: Chemical engineering journal, 2009, v. 152, no. 1, p. 103-109 How to cite?
Journal: Chemical engineering journal 
Abstract: A natural photosensitizer riboflavin (Rf), known as vitamin B2, and an environmental friendly strong oxidant hydrogen peroxide (H2O2) were employed for the riboflavin-sensitized photooxidation process (UV/Rf/H2O2) in this study. This approach could be considered as a hybrid process of UV/Rf (photosensitization) and UV/H2O2 (advanced oxidation). The photodecay of a phenylurea herbicide monuron was investigated by varying the doses of Rf and H2O2 in this work. The use of UV/Rf/H2O2 showed a promising performance for degrading monuron compared with the direct photolysis (UV), UV/Rf, and UV/H2O2 processes. It was found that more than 99% of the monuron was removed in the UV/Rf/H2O2 process in less than 70 min depending on the dosages of Rf and H2O2. In general, the overall improvement of UV/Rf/H2O2 process would achieve as high as ∼450% comparing to sole-UV process. In addition, a kinetic model for the UV/Rf/H2O2 process was developed successfully in this study to facilitate the prediction of the additional performance on the degradation of monuron comparing with the daughter processes (UV, UV/Rf, and UV/H2O2).
URI: http://hdl.handle.net/10397/9987
ISSN: 1385-8947
DOI: 10.1016/j.cej.2009.03.038
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