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Advanced oxidation of natural organic matter using hydrogen peroxide and iron-coated pumice particles.
Chemosphere. 2007 Aug; 68(10):1846-53.C

Abstract

The oxidative removal of natural organic matter (NOM) from waters using hydrogen peroxide and iron-coated pumice particles as heterogeneous catalysts was investigated. Two NOM sources were tested: humic acid solution and a natural source water. Iron coated pumice removed about half of the dissolved organic carbon (DOC) concentration at a dose of 3000 mg l(-1) in 24 h by adsorption only. Original pumice and peroxide dosed together provided UV absorbance reductions as high as 49%, mainly due to the presence of metal oxides including Al(2)O(3), Fe(2)O(3) and TiO(2) in the natural pumice, which are known to catalyze the decomposition of peroxide forming strong oxidants. Coating the original pumice particles with iron oxides significantly enhanced the removal of NOM with peroxide. A strong linear correlation was found between iron contents of coated pumices and UV absorbance reductions. Peroxide consumption also correlated with UV absorbance reduction. Control experiments proved the effective coating and the stability of iron oxide species bound on pumice surfaces. Results overall indicated that in addition to adsorptive removal of NOM by metal oxides on pumice surfaces, surface reactions between iron oxides and peroxide result in the formation of strong oxidants, probably like hydroxyl radicals, which further oxidize both adsorbed NOM and remaining NOM in solution, similar to those in Fenton-like reactions.

Authors+Show Affiliations

Department of Environmental Engineering, Suleyman Demirel University, 32260 Isparta, Turkey. mkitis@mmf.sdu.edu.trNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

17462704

Citation

Kitis, M, and S S. Kaplan. "Advanced Oxidation of Natural Organic Matter Using Hydrogen Peroxide and Iron-coated Pumice Particles." Chemosphere, vol. 68, no. 10, 2007, pp. 1846-53.
Kitis M, Kaplan SS. Advanced oxidation of natural organic matter using hydrogen peroxide and iron-coated pumice particles. Chemosphere. 2007;68(10):1846-53.
Kitis, M., & Kaplan, S. S. (2007). Advanced oxidation of natural organic matter using hydrogen peroxide and iron-coated pumice particles. Chemosphere, 68(10), 1846-53.
Kitis M, Kaplan SS. Advanced Oxidation of Natural Organic Matter Using Hydrogen Peroxide and Iron-coated Pumice Particles. Chemosphere. 2007;68(10):1846-53. PubMed PMID: 17462704.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Advanced oxidation of natural organic matter using hydrogen peroxide and iron-coated pumice particles. AU - Kitis,M, AU - Kaplan,S S, Y1 - 2007/04/25/ PY - 2006/08/15/received PY - 2007/03/12/revised PY - 2007/03/13/accepted PY - 2007/4/28/pubmed PY - 2007/8/25/medline PY - 2007/4/28/entrez SP - 1846 EP - 53 JF - Chemosphere JO - Chemosphere VL - 68 IS - 10 N2 - The oxidative removal of natural organic matter (NOM) from waters using hydrogen peroxide and iron-coated pumice particles as heterogeneous catalysts was investigated. Two NOM sources were tested: humic acid solution and a natural source water. Iron coated pumice removed about half of the dissolved organic carbon (DOC) concentration at a dose of 3000 mg l(-1) in 24 h by adsorption only. Original pumice and peroxide dosed together provided UV absorbance reductions as high as 49%, mainly due to the presence of metal oxides including Al(2)O(3), Fe(2)O(3) and TiO(2) in the natural pumice, which are known to catalyze the decomposition of peroxide forming strong oxidants. Coating the original pumice particles with iron oxides significantly enhanced the removal of NOM with peroxide. A strong linear correlation was found between iron contents of coated pumices and UV absorbance reductions. Peroxide consumption also correlated with UV absorbance reduction. Control experiments proved the effective coating and the stability of iron oxide species bound on pumice surfaces. Results overall indicated that in addition to adsorptive removal of NOM by metal oxides on pumice surfaces, surface reactions between iron oxides and peroxide result in the formation of strong oxidants, probably like hydroxyl radicals, which further oxidize both adsorbed NOM and remaining NOM in solution, similar to those in Fenton-like reactions. SN - 0045-6535 UR - https://www.unboundmedicine.com/medline/citation/17462704/Advanced_oxidation_of_natural_organic_matter_using_hydrogen_peroxide_and_iron_coated_pumice_particles_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0045-6535(07)00392-X DB - PRIME DP - Unbound Medicine ER -