Oxidation of chlorophenols with hydrogen peroxide in the presence of goethite.
The use of goethite (alpha-FeOOH) and hydrogen peroxide was recently found that they could effectively oxidize organic compounds. The study was to investigate the effect of goethite particle size, goethite concentration, Fe2+ and Fe3+ on the 2-chlorophenol oxidation. Results indicated that 2-chlorophenol can be decomposed with hydrogen peroxide catalyzed by goethite and the oxidation rate increased with decreasing goethite particle size. 2-Chlorophenol degradation was almost retarded with 0.8 g/l of goethite because ferrous ions could not be produced at this condition. Addition of Fe2+ and Fe3+ can enhance the catalytic oxidation rate of 2-chlorophenol very efficiently. In conclusion, the main mechanism of goethite catalyzing hydrogen peroxide to oxidize 2-chlorophenol may be due to the catalysis of ferrous ions and goethite surface.
Lu
M C
MC
Department of Environmental Engineering and Health, Chia Nan College of Pharmacy and Science, Taiwan, ROC. mmclu@chna.chna.edu.tw
D002733:Chlorophenols / Q000737:chemistry*; D005290:Ferric Compounds / Q000737:chemistry; D005296:Ferrous Compounds / Q000737:chemistry; D006861:Hydrogen Peroxide / Q000737:chemistry*; D058085:Iron Compounds / Q000737:chemistry*; D008903:Minerals; D010084:Oxidation-Reduction; D010316:Particle Size
D002733:Chlorophenols; D005290:Ferric Compounds; D005296:Ferrous Compounds; D058085:Iron Compounds; D008903:Minerals; C094886:goethite; D006861:Hydrogen Peroxide; C030683:2-chlorophenol