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Received November 26, 2004
Accepted April 22, 2005
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Catalytic Ozonation of Humic Acids with Fe/MgO
Dept of Applied Chemistry, Dongduk Women’s University, Wolgok-dong 23-1, Sungbuk-gu, Seoul 136-714, Korea 1Korea Institute of Science and Technology, Echo-nano Center, P.O. Box 131, Seoul 136-130, Korea 2Department of Chemistry, Hanyang University, Hangdang-dong 17, Sungdong-gu, Seoul 133-600, Korea
jkdcat@kist.re.kr
Korean Journal of Chemical Engineering, July 2005, 22(4), 536-540(5), 10.1007/BF02706638
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Abstract
Humic acids were degraded by ozone at room temperature in a stirred tank reactor and a fixed bed reactor with Fe/MgO catalysts. Experimental results show that the ozonation with Fe/MgO induced a significant reduction in UV absorbance of humic acids as compared to ozone alone. Fe/MgO was the most efficient catalyst to degrade humic acids in the presence of ozone. GPC (gel permeation chromatography) showed that the humic acids with high molecular weight could be severely decomposed into organic compounds with low molecular weight on the Fe/MgO catalyst, indicating that humic acids could be catalytically decomposed. The continuous reaction experiments with the palletized catalysts supported that humic acids can be removed by catalysis as well as adsorption.
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References
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Jung KD, Han SH, "Room Temperature Catalytic Oxidation of Wastewater by Air (LOTECH)", Achima 2000 Environ., 104 (2000)
Jung KD, Joo OS, Kim CS, Catal. Lett., 84(1-2), 53 (2002)
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Kong SH, Kwon CI, Kim MH, Korean J. Chem. Eng., 20(2), 293 (2003)
Legube B, Leitner NKV, Catal. Today, 53(1), 61 (1999)
Ma J, Graham NJD, Ozone-Sci. Eng., 19, 227 (1997)
Mok YS, Nam IS, Korean J. Chem. Eng., 21(5), 976 (2004)
Naydenov A, Mehandjiev D, Appl. Catal. A: Gen., 97, 17 (1992)
Paode RD, Chandrakanath MS, Amy GL, Gramith JT, Ferguson DW, Ozone-Sci. Eng., 17, 25 (1995)
Rice RG, Ozone-Sci. Eng., 2, 75 (1980)
Schwammlein K, Leitzke O, In Proc. 12th Ozone World Congress, Lille, France, 1, 325 (1995)
Shukairy HM, Summers RS, Water Res., 26, 1217 (1992)
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Xiong F, Croue JP, Legube B, Environ. Sci. Technol., 26, 1059 (1992)
