This work aims at obtaining experimental data on ozonation of 1,2-dihydroxybenzene (DHB) in the presence of activated carbon, with a view to assessing possible changes in its surface chemical structure and adsorption capacity. Experiments were conducted in a 0.5 L reactor, loaded with 2 g Filtrasorb 400 granular activated carbon, and 1-5 mM DHB aqueous solution at pH 2-8. Ozone gas was generated with an Ozocav generator, and fed into the reactor for a given exposure time, in the range 0.5-240 min, at 25°C and 1 atm. After each run, liquid and activated carbon samples were taken for chemical assays. Soluble organic groups present on the active carbon surface were desorbed and analysed by GC-MS and HPLC. Activated carbon chemical surface properties were analysed using TPD, FT-IR, and XPS techniques. Reactions between ozone and adsorbed DHB were shown to be fast, leading to formation of C-6, C-4 and C-2 by-products. Oxygenated surface groups, particularly, COOH and C = O, increased as a result of ozonation.
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Research Article| September 01 2001
Ozonation of 1,2-dihydroxybenzene in the presence of activated carbon
Water Sci Technol (2001) 44 (5): 125–130.
C. Zaror, G. Soto, H. Valdés, H. Mansilla; Ozonation of 1,2-dihydroxybenzene in the presence of activated carbon. Water Sci Technol 1 September 2001; 44 (5): 125–130. doi: https://doi.org/10.2166/wst.2001.0267
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