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Catalytic ozonation of phenol and oxalic acid with copper-loaded activated carbon

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Abstract

A novel heterogeneous catalytic ozonation process in water treatment was studied, with a copper-loaded activated carbon (Cu/AC) that was prepared by an incipient wetness impregnation method at low temperature and tested as a catalyst in the ozonation of phenol and oxalic acid. Cu/AC was characterized using XRD, BET and SEM techniques. Compared with ozonation alone, the presence of Cu/AC in the ozonation processes significantly improves the degradation of phenol or oxalic acid. With the introduction of the hydroxyl radical scavenger, i.e., turt-butanol alcohol (t-BuOH), the degradation efficiency of both phenol and oxalic acid in the Cu/AC catalyzed ozonation process decreases by 22% at 30 min. This indicates that Cu/AC accelerates ozone decomposition into certain concentration of hydroxyl radicals. The amount of Cu(II) produced during the reaction of Cu/AC-catalyzed ozonation of phenol or oxalic acid is very small, which shows that the two processes are both heterogeneous catalytic ozonation reactions.

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Correspondence to Han-jin Luo  (罗汉金).

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Foundation item: Project(40973074) supported by the National Natural Science Foundation of China

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Rao, Yf., Luo, Hj., Wei, Ch. et al. Catalytic ozonation of phenol and oxalic acid with copper-loaded activated carbon. J. Cent. South Univ. Technol. 17, 300–306 (2010). https://doi.org/10.1007/s11771-010-0046-y

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  • DOI: https://doi.org/10.1007/s11771-010-0046-y

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