Heterogeneous catalytic wet air oxidation of refractory organic pollutants in industrial wastewaters: a review.
Catalytic wet air oxidation (CWAO) is one of the most economical and environmental-friendly advanced oxidation process. It makes a promising technology for the treatment of refractory organic pollutants in industrial wastewaters. Various heterogeneous catalysts including noble metals and metal oxides have been extensively studied to enhance the efficiency of CWAO. The present review is concerned about the literatures published in this regard. Phenolics, carboxylic acids, and nitrogen-containing compounds were taken as model pollutants in most cases, and noble metals such as Ru, Rh, Pd, Ir, and Pt as well as oxides of Cr, Mn, Fe, Co, Ni, Cu, Zn, Mo, and Ce were applied as heterogeneous catalysts. Reports on their characterization and catalytic performances for the CWAO of aqueous pollutants are reviewed. Discussions are also made on the reaction mechanisms and kinetics proposed for heterogeneous CWAO and also on the typical catalyst deactivations in heterogeneous CWAO, i.e. carbonaceous deposits and metal leaching.
Department of Chemical and Biomolecular Engineering (BK21 program), KAIST, Yuseong-gu, Daejeon, Republic of Korea.
Kyoung-Hun
KH
Kim
Son-Ki
SK
Ihm
D002384:Catalysis; D009930:Organic Chemicals / Q000737:chemistry*; D010084:Oxidation-Reduction; D014873:Water Pollutants / Q000737:chemistry*
D009930:Organic Chemicals; D014873:Water Pollutants