title: Role of goethite dissolution in the oxidation of 2-chlorophenol with hydrogen peroxide.
abstract: 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.
authors.affiliation: Department of Environmental Engineering and Health, Chia Nan University of Pharmacy and Science, Tainan, Taiwan, ROC. mmclu@mail.chna.edu.tw
authors.forename: Ming-Chun
authors.initials: MC
authors.lastname: Lu
authors.forename: Jong-Nan
authors.initials: JN
authors.lastname: Chen
authors.forename: Hsu-Hui
authors.initials: HH
authors.lastname: Huang
mesh_terms: 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
chemical_list: 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