Deactivation of Pt/MnOx–CeO2 catalysts for the catalytic wet oxidation of phenol: Formation of carbonaceous deposits and leaching of manganese

Heterogeneous catalytic wet air oxidation of refractory organic pollutants in industrial wastewaters: A review

“…Obviously, metal ions are leached out from active species and/or supports to reactant solution under hot acidic condition, resulting in the decrease of catalytic activity [226]. Moreover, the leached metal ions usually exhibit toxicity so that a treatment is required to recover them [175,200].…”

Catalytic wet oxidation of organic compounds over N-doped carbon nanotubes in batch and continuous operation

“…It is important to note that the formation of carbonaceous deposits on the surface of the catalyst and the over-oxidation of Pt were not evaluated. However, these phenomena are known to originate the deactivation of Ptbased catalysts in CWO [15,16,49]. Taking into account the high Pt demands and costs, Ptfree CNT-BM-M is a better alternative for waste water treatment by CWO, achieving high phenol removal in addition to the fact that it can be prepared by a cost effective and easy to handle method, avoiding the use of solvents and production of wastes.…”

“…[5,[11][12][13][14] have demonstrated good activity for the oxidation of organic compounds by CWO. However, the cost of noble metals and the typical deactivation observed due to the deposition of carbonaceous materials (poisoning) and/or leaching of the active phase [7,8,15,16], which also pollutes the treated effluent, are some of the limitations towards the implementation of the CWO process. In this context, recent works have mainly focused on the development of an active but also stable and cheap catalyst for CWO.…”

Pharmaceutical removal from water with iron- or manganese-based technologies: A review

“…1), Mn can work as a catalyst in Fenton's reaction (Ma et al, 2004;Kouraichi et al, 2010;Yao et al, 2014). In Mn/H 2 O 2 system, both amorphous and crystalline Mn(IV) compounds are used as catalysts to remove carbon tetrachloride, with removal efficiencies of »90% at pH 6 (Watts et al, 2005).…”