Kinetics of wet peroxide oxidation of phenol with a gold/activated carbon catalyst

Dye‐containing wastewater treatment by photo‐assisted wet peroxidation using Au nanosized catalysts

“…The results obtained for stability runs were in line with what was reported by other authors, who did not observe leaching of gold in their studies, nor a loss in catalytic activity …”

“…The results obtained for stability runs were in line with what was reported by other authors, who did not observe leaching of gold in their studies, nor a loss in catalytic activity. 9,11,16,21,42,43 Parametric study Since the Au/Al 2 O 3 catalyst showed the highest TOF values and better process performance, this catalyst was chosen for a further study dealing with optimization of the process. For that, a wileyonlinelibrary.com/jctb parametric study was carried out for a better understanding of the effect of each operating variable on dye degradation and mineralization.…”

Optimizing chemical oxygen demand removal from synthesized wastewater containing lignin by catalytic wet-air oxidation over CuO/Al2O3 catalysts

“…Thus, heterogeneous metal-oxide catalysts, such as CuO (Kim and Ihm 2007;Hua, Ma, and Zhang 2013), TiO 2 (Cervantes et al 2013;Pintar, Batista, and Tišler 2008), Graphene oxide , and ZrO 2 (Wei et al 2013) have recently been used. Of these catalysts, CuO is highly active in the decomposition of phenolic compounds, including phenol (Ayusheev et al 2014; A c c e p t e d M a n u s c r i p t 4 Domínguez et al 2014;Lefèvre et al 2011;Wang et al 2014;Yan, Jiang, and Zhang 2014;Yang et al 2014), dye (Ovejero et al 2013;Fu and Kyzas 2014) and chlorophenol (Wei et al 2013a;Zhou et al 2014;Lee, Lin, and Jou 2012). We previously found that 10 wt% CuO/AlR 2 ROR 3 R could catalyze the wet oxidation of aniline making possible high degradation to COR 2 R at temperatures ranging from 160 to 230°C under air pressure ranging from 5 to 10 bars for two hours (Sriprom et al 2014).…”

The pH effect on the kinetics of 4-nitrophenol removal by CWPO with doped carbon black catalysts

“…Among the operating conditions of the CWPO process, the pH of the reaction medium can have a significant effect, depending on the pollutant and catalyst considered [34,36,41,42]. In CWPO kinetic studies, the pH effect is usually first studied in order to establish the adequate pH range for the catalytic performance and the kinetic model is later developed for that specific pH [43][44][45]. In this sense, it should be noted that reports dealing with kinetic studies and investigating the effect of the initial pH in CWPO do not consider the pH contribution in the developed kinetic model (even observing a significant effect of pH), neither the leached iron species nor the pH evolution of the medium with the reaction time [43][44][45].…”

“…In CWPO kinetic studies, the pH effect is usually first studied in order to establish the adequate pH range for the catalytic performance and the kinetic model is later developed for that specific pH [43][44][45]. In this sense, it should be noted that reports dealing with kinetic studies and investigating the effect of the initial pH in CWPO do not consider the pH contribution in the developed kinetic model (even observing a significant effect of pH), neither the leached iron species nor the pH evolution of the medium with the reaction time [43][44][45]. In the few kinetic studies related to the peroxidation of 4-NP [35,46], the pH is never considered in the development of the kinetic model.…”