title: The catalytic activity of the iron-coated pumice particles used as heterogeneous catalysts in the oxidation of natural organic matter by H2O2.
abstract: The oxidative removal of natural organic matter (NOM) from waters was investigated by hydrogen peroxide (H2O2) 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 H2O2 is improved by the addition of iron-coated pumice particles which activate the H2O2 molecule, leading to the formation of hydroxyl radicals in a Fenton-like process.
authors.affiliation: a Department of Environmental Engineering, Engineering Faculty , Aksaray University , Aksaray , Turkey.
authors.forename: Alper
authors.initials: A
authors.lastname: Alver
authors.affiliation: a Department of Environmental Engineering, Engineering Faculty , Aksaray University , Aksaray , Turkey.
authors.forename: Mihrican
authors.initials: M
authors.lastname: Karaarslan
authors.affiliation: a Department of Environmental Engineering, Engineering Faculty , Aksaray University , Aksaray , Turkey.
authors.forename: Ahmet
authors.initials: A
authors.lastname: Kılıç
mesh_terms: D006812:Humic Substances / Q000032:analysis*; D006861:Hydrogen Peroxide / Q000737:chemistry*; D007501:Iron / Q000737:chemistry*; D010084:Oxidation-Reduction; D017640:Silicates / Q000737:chemistry*; D022882:Trihalomethanes / Q000737:chemistry; D018508:Water Purification / Q000379:methods*
chemical_list: D006812:Humic Substances; D017640:Silicates; D022882:Trihalomethanes; D006861:Hydrogen Peroxide; D007501:Iron; C005144:pumice
keywords: Disinfection by product; heterogeneous catalytic oxidation process; iron-coated pumice; natural organic matter; trihalomethane