The catalytic activity of the iron-coated pumice particles used as heterogeneous catalysts in the oxidation of natural organic matter by H2O2

• Published in: Environmental technology Vol. 37; no. 16; pp. 2040 - 2047
• Main Authors: Alver, Alper, Karaarslan, Mihrican, Kılıç, Ahmet
• Format: Journal Article
• Language: English
• Published: England Taylor & Francis 01.08.2016; Taylor & Francis Ltd
• Subjects: Atoms & subatomic particles; Catalytic oxidation; Disinfection by product; heterogeneous catalytic oxidation process; Humic Substances - analysis; Hydrogen peroxide; Hydrogen Peroxide - chemistry; Iron - chemistry; iron-coated pumice; natural organic matter; Oxidation-Reduction; Silicates - chemistry; trihalomethane; Trihalomethanes - chemistry; Water Purification - methods; Disinfection by product; heterogeneous catalytic oxidation process; natural organic matter; trihalomethane; iron-coated pumice
• ISSN: 0959-3330; 1479-487X
• DOI: 10.1080/09593330.2016.1139632

The oxidative removal of natural organic matter (NOM) from waters was investigated by hydrogen peroxide (H 2 O 2 ) and iron-coated pumice particles in heterogeneous catalytic oxidation process (HCOP). Removal of trihalomethane (THM) precursors, which is formed THM by the reacts with chloride, was performed with the hydroxyl radicals. Coating the original pumice particles with iron oxides significantly enhanced the removal of NOM with peroxide. The studies were carried out in two sections: (1) decomposition of hydrogen peroxide in pure water with iron-coated pumice and (2) oxidation of THM Precursor (NOM) by hydrogen peroxide with iron-coated pumice. The monitored parameters in this study include dissolved organic carbon and trihalomethanes formation potential. The results show that iron-coated pumice catalyst significantly increased the removal efficiency of NOM in the HCOP. The results show that iron-coated pumice catalyst significantly increased the removal efficiency of NOM in the HCOP. Results show that the oxidation of NOM and remaining NOM with H 2 O 2 is improved by the addition of iron-coated pumice particles which activate the H 2 O 2 molecule, leading to the formation of hydroxyl radicals in a Fenton-like process.