Abstract:
Adsorption of organic pollutants from waste waters at ambient conditions followed by catalytic dry oxidation of these adsorbed materials at low temperatures has been reported to be a promising method for the treatment of toxic and/or biorefractory wastewaters. This work mainly investigated the effect of metal loadings on the catalytic activity of the CuO/AC catalystsorbent used for the catalytic dry oxidation of phenol through temperatureprogrammed oxidation (TPO) and consecutive adsorptionoxidation experiments. The results indicate that increasing metal loadings promotes the phenol oxidation activity of the CuO/AC catalystsorbent, and enhances the affinity between the phenol and the CuO/AC catalystsorbent. This makes the adsorbed phenol desorb and/or deassociatively desorb from the catalystsorbent difficult. In addition, the ignition activity of the CuO/AC catalystsorbent itself is improved with increasing metal loadings. According to these results, it is clear that there is a proper metal loadings range of 3 ~ 5% for the CuO/AC catalystsorbent used for catalytic dry oxidation of phenol, which is calculated as the Cu weight percent.