Water Science & Technology Vol 55 No 1-2 pp 217–223 © IWA Publishing 2007 doi:10.2166/wst.2007.018
Degradation of endocrine disrupting chemicals in aqueous solution by interaction of photocatalytic oxidation and ferrate (VI) oxidation
C. Li* and X.Z. Li**
*Department of Civil and Structural Engineering, The Hong Kong Polytechnic University, Hong Kong, , China (E-mail: li.cong@polyu.edu.hk)
**Department of Civil and Structural Engineering, The Hong Kong Polytechnic University, Hong Kong, , China
ABSTRACT
In this study, the degradation of bisphenol A in aqueous suspension by interaction of photocatalytic oxidation and ferrate(VI) oxidation was investigated under different conditions. The results indicate that the formation of Fe(V) and Fe(IV) is in the photocatalytic reduction of Fe(VI) by electron (e-cb) on the surface of TiO2. The oxidation efficiency of the photocatalytic oxidation in the presence of Fe(VI) was much greater than that without. In addition, the decomposition of Fe(VI) under different conditions was also investigated. The results indicate that the Fe(VI) reduction was accelerated by photocatalytic reaction and the adsorption capacity of Fe(VI) on TiO2 surface decreased as pH increased. The characteristics of solid potassium ferrate prepared were investigated by X-ray diffraction. It was found that the potassium ferrate solid has a tetrahedral structure with a space group of D2h (Pnma) and a=7.705 Å, b=5.863 Å, and c=10.36 Å.
Keywords: BPA; endocrine disrupting chemicals; photocatalytic oxidation; potassium ferrate
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