Journal
DESALINATION
Volume 262, Issue 1-3, Pages 228-234Publisher
ELSEVIER
DOI: 10.1016/j.desal.2010.06.019
Keywords
AlFe-pillared montmorillonite; Fe-ZSM-5 zeolite; Heterogeneous photocatalytic degradation; Methomyl; Photo-Fenton reaction
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Funding
- European Agency for Reconstruction through the Ministry of International Economic Relations [04SER02/01/009]
- Ministry of Science and Technological Development of the Republic of Serbia [142063, TR 20041]
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Photo-Fenton degradation of the insecticide methomyl in water using Fe-ZSM-5 zeolite and AlFe-pillared montmorillonite catalysts under halogen lamp light was studied. The study was performed at room temperature in a glass batch reactor under constant airflow. Both catalysts exhibited activity in the wet oxidative degradation of methomyl. The rate of photodecomposition of methomyl was measured using UV spectrometry and HPLC, while its mineralization was followed using ion chromatography (IC) and total organic carbon (TOC) analyzer. IC results showed that mineralization led to formation of sulfate, nitrate and ammonium ions during the process. Under our conditions, complete disappearance of 16.22 mg/L of pure pesticide and 100% or 80% TOC removal occurred within 4 h using 5 g/L or 1 g/L of Fe-ZSM-5 zeolite, respectively. The Fe-ZSM-5 was found to be a better catalyst. Pseudo-first-order rate constants were calculated, and the performed treatments compared. (C) 2010 Elsevier B.V. All rights reserved.
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