Degradation of 4-Chlorophenol Using Homogeneous Fenton’s Oxidation Process: Kinetic Study
Degradation of 4-chlorophenol (4-CP) has been studied experimentally using Fenton’s oxidation process. To catalyze hydrogen peroxide (H2O2), ferrous sulphate heptahydrate (FeSO4·7H2O) was chosen as the source of ferrous ions. Batch tests for degradation of 4-CP were conducted at room temperature and the effect of various parameters such as initial pH, reaction time, concentration of H2O2 and ferrous ions on the removal efficiency of 4-CP has been studied. The degradation of 4-CP has been reported in terms of 4-CP removal and reduction in total organic carbon (TOC) and chemical oxygen demand (COD). The study revealed that with increase in pH, Fe2+ ions and H2O2 dosage, the degradation, TOC removal and COD removal first increased and thereafter decreased. The optimal conditions were observed at pH 5 with 6 and 0.3 mM of H2O2 and Fe2+ concentrations, respectively. At optimum conditions, degradation of 4-CP was 90%, TOC and COD removal were 54% and 45%, respectively, within 30 min. Kinetic study for the degradation reaction of 4-CP was also done to analyse the order of reaction. The kinetic studies result revealed second-order reaction mechanism for the degradation of 4-CP using Fenton’s oxidation process.
Keywords4-chlorophenol Fenton’s reagent Hydroxyl radicals Degradation Reaction kinetics
- Clesceri LS, Greenberg AE, Eaton AD (1999) Standard methods for the examination of water and wastewater, 20th edn. American Public Health Association (APHA), WashingtonGoogle Scholar
- Ghosh P, Kelapure P, Samanta AN, Ray S (2012) Determination of reaction rate constant for p-chlorophenol and nitrobenzene reacting with OH∙ during oxidation by Fe(II)/H2O2 system. Int J Chem Technol Res 4:116–123Google Scholar
- Khamaruddin PF, Bustam MA Omar AA (2011) Using Fenton’s reagents for the degradation of diisopropanolamine: effect of temperature and pH. In: International conference on environment and industrial innovation, vol 12, pp 12–17Google Scholar
- Sarfert F, Jekel M, Wichmann K (1994) Treatment and utilization of water work sludge’s in Germany. Water Supply 12(1):6–8Google Scholar
- Zazo JA, Casas JA, Mohedano AF, Rodriguez JJ (2009) Semicontinuous fenton oxidation of phenol in aqueous solution. A kinetic study. Water Res 43(16):4063–4069Google Scholar