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摘要
The aim of this paper was to assess the mineralization degree of p-chlorophenol by using photo-Fenton and heterogeneous photocatalytic processes (photocatalysts based on LDH(s) - layered double hydroxides). The degradation of p-chlorophenol was assessed by measuring TOC values for samples taken at various intervals. As part of the photo-Fenton method, after 60 min, the mineralization degree was 63.5% under given working conditions. The degradation of p-chlorophenol by heterogeneous photocatalysis set off the beneficial role of sonication in the synthesis of layered double hydroxide-supported photocatalytic systems. The mineralization degrees as resulted from experiments showed that the increase of sonication and stirring times (as part of the conventional method) was not justifiable beyond 60 min. Moreover, the experiments emphasized the role of hydrogen peroxide on the efficiency of heterogeneous photocatalytic degradation. Based on literature, which stated that the mineralization process of organic compounds followed pseudo-first-order kinetics, and the obtained experimental data, the apparent mineralization constants were assessed for all sets of resulted kinetic data.
- 出版日期2008-8
