Role of goethite dissolution in the oxidation of 2-chlorophenol with hydrogen peroxide.
It is well known that the dissolution of goethite plays an important role in catalyzing the oxidation of organic chemicals. Therefore, this study investigates how surface dissolution of goethite affects 2-chlorophenol oxidation in the goethite/H2O2 process. Experimental results indicate that ligand and reductant can enhance the dissolution rate of goethite, which is surface-controlled. Our results further indicate 2-chlorophenol degradation depends on goethite concentration. In addition, the oxidation rate of 2-CP is correlated with reductive dissolution rate at various dosages of goethite. Moreover, the oxidation mechanism of 2-CP is also a surface-controlled reaction. A mechanism proposed herein indicates that, in addition to the contaminant, its intermediate species affect the oxidation rate as well.
Lu
Ming-Chun
MC
Department of Environmental Engineering and Health, Chia Nan University of Pharmacy and Science, Tainan, Taiwan, ROC. mmclu@mail.chna.edu.tw
Chen
Jong-Nan
JN
Huang
Hsu-Hui
HH
D001205:Ascorbic Acid / Q000494:pharmacology; D002733:Chlorophenols / Q000378:metabolism*; D004305:Dose-Response Relationship, Drug; D005290:Ferric Compounds / Q000737:chemistry; D006861:Hydrogen Peroxide / Q000008:administration & dosage / Q000494:pharmacology*; D007220:Industrial Waste / Q000032:analysis; D007501:Iron / Q000008:administration & dosage; D058085:Iron Compounds / Q000737:chemistry / Q000494:pharmacology*; D008024:Ligands; D008903:Minerals; D008956:Models, Chemical; D010070:Oxalates / Q000494:pharmacology; D010084:Oxidation-Reduction / Q000187:drug effects; D012995:Solubility; D013499:Surface Properties; D014867:Water / Q000378:metabolism
D002733:Chlorophenols; C045076:Fenton's reagent; D005290:Ferric Compounds; D007220:Industrial Waste; D058085:Iron Compounds; D008024:Ligands; D008903:Minerals; D010070:Oxalates; D014867:Water; C094886:goethite; C000499:ferric oxide; D006861:Hydrogen Peroxide; D007501:Iron; C030683:2-chlorophenol; D001205:Ascorbic Acid