Removal of citrate and hypophosphite binary components using Fenton, photo-Fenton and electro-Fenton processes.
Both citrate and hypophosphite in aqueous solution were degraded by advanced oxidation processes (Fe2+/H2O2, UV/Fe2+/H2O2, and electrolysis/ Fe2+/H2O2) in this study. Comparison of these techniques in oxidation efficiency was undertaken. It was found that Fenton process could not completely degrade citrate in the presence of hypophosphite since it caused a series inhibition. Therefore, UV light (photo-Fenton) or electron current (electro-Fenton) was applied to improve the degradation efficiency of the Fenton process. Results showed that both photo-Fenton and electro-Fenton processes could overcome the inhibition of hypophosphite, especially the electro-Fenton.
Huang
Yao-Hui
YH
Department of Chemical Engineering, National Cheng Kung University, Tainan 701, Taiwan, China. yhhuang@mail.ncku.edu.tw
Su
Hsiao-Ting
HT
Lin
Li-Way
LW
D019343:Citric Acid / Q000737:chemistry* / Q000302:isolation & purification*; D004563:Electrochemistry; D006861:Hydrogen Peroxide / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D007501:Iron / Q000737:chemistry*; D010084:Oxidation-Reduction; D017905:Phosphites / Q000737:chemistry* / Q000302:isolation & purification*; D055668:Photochemical Processes
C045076:Fenton's reagent; D017905:Phosphites; D019343:Citric Acid; D006861:Hydrogen Peroxide; D007501:Iron