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| Titel: |
An oxidation kinetic model of unsaturated chlorinated aliphatic compounds by Fenton's reagent |
| Auteur: |
Tang, Walter Z. Huang, C. P. |
| Verschenen in: |
Journal of environmental science and health. Part A, Toxic/hazardous substances & environmental engineering |
| Paginering: | Jaargang 31 (1996) nr. 10 pagina's 2755-2775 |
| Jaar: |
1996-11 |
| Inhoud: |
An oxidation kinetic model of trichloroethylene (TCE) by Fenton's reagent is developed based upon transition state theory. Hydroxylated active complexes are assumed to be the transition state after hydroxyl radicals have attacked the organic compound. The complex can either disproportionate into Cl- and the other products, or return to their original reactants. Because both hydroxyl radicals and the active complexes have extremely high reactivity, their steady-state concentrations are assumed constant in developing the kinetic model. The model indicates that Fenton oxidation is first order with respect to the organic concentration. The degree of oxidation is dependent upon the dosage of H2O2 and Fe2+. Because H2O2 and Fe2+ can also react with hydroxyl radicals, neither of them should be overdosed if maximal reaction rate is to be achieved. Experiments have been conducted to obtain rate constants for three different chloroethylenes and chloroethane. It is found that the model is valid only for unsaturated aliphatic compounds such as TCEs. In addition, increasing chlorine content of the chlorinated compounds will decrease their reactivity in Fenton's oxidation. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 2 van 23 gevonden artikelen
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