Affiliation:
1. Seoul National Univerity of Science and Technology
2. Kangwon National University
Abstract
Ozonation of humic acid has been conducted in the presence of hydrogen peroxide as catalyst. Besides the study of total organic carbon removal in the ozonation, ozonation by-products were investigated through the change of injected concentration of H2O2, initial pH of aqueous humic acid and injection time of H2O2. The variation of hydrogen peroxide and formaldehyde contents in the processes are mainly evaluated. The formaldehyde was formed less in ozonation with hydrogen peroxide system than without it. When initial pH in solution was changed from 3.5 to 10.5, the formaldehyde was formed with the highest concentration at pH 5. In addition, the concentration of H2O2 produced by ozonation was found to be increased with decreasing pH of the sample solution in this process.
Publisher
Trans Tech Publications, Ltd.
Reference5 articles.
1. D.S. Rhee, Y.R. Jung, Characterization of humic acid in the chemical oxidation technology (II) – characteristics by ozonation, Analytical Science & Technology, 13 (2000) 241-249.
2. W.J. Huang, G.C. Fang, C.C. Wang, The determination and fate of disinfection by-products from ozonation of polluted raw water, Sci. of the Total Environment, 345 (2005) 261-272.
3. H. Matsuda, T. Sato, H. Nagase, Y. Ose, K. Sumid, Aldehydes as mutagens formed by ozonation of humic substances, Sci. of the Total Environment 114 (1992) 205-213.
4. R. Brunet, M.M. Bourbigot, M. Dore, Oxidation of organic compounds through the combination ozone-hydrogen peroxide, Ozone Sci. & Eng., 6 (1984) 163-183.
5. K. Nakamuro, H. Ueno, M. Kakao, Y. Sayato, Formation of hydrogen peroxide by aqueous ozonation of humic acid and aromatic hydrocarbons, Chemosphere, 20 (1990) 525-531.