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Degradation of carbofuran in aqueous solution by ultrasound and Fenton processes: Effect of system parameters and kinetic study

2010; Elsevier BV; Volume: 178; Issue: 1-3 Linguagem: Inglês

10.1016/j.jhazmat.2010.01.081

1873-3336

Ying-Shih Ma, Chi-Fanga Sung, Jih‐Gaw Lin,

Electrochemical Analysis and Applications

To establish an efficient oxidation process for carbofuran degradation, the effects of some operating parameters such as dosages of H2O2, Fe2+ and initial carbofuran concentrations were observed during carbofuran degradation by the ultrasound process, Fenton process and a combined ultrasound/Fenton process. The degradation kinetics of carbofuran was also examined based on the experimental data. The results show that more than 99% of the carbofuran was degraded by the ultrasound/Fenton process within short reaction time periods. Increased dosages of H2O2 and Fe2+ enhanced the degradation of carbofuran in the ultrasound and Fenton oxidation processes, but initial carbofuran concentrations decreased carbofuran degradation in both the Fenton and ultrasound/Fenton processes. The degradation kinetics of carbofuran by the three oxidation processes was found to be in accordance with first-order reaction kinetics. The results provide fundamental information about the treatment of carbofuran wastewater and/or other pesticides by the ultrasound/Fenton oxidation process.