Heterogeneous catalytic oxidation of aqueous phenol on red mud-supported cobalt catalysts

Syaifullah Muhammad, Edy Saputra, Hongqi Sun, Ha Ming Ang, Moses O. Tadé, Shaobin Wang

Research output: Contribution to journalArticlepeer-review

52 Citations (Scopus)

Abstract

Red mud (RM), an industrial waste from the alumina refinery industry, was used as a support for preparation of Co-oxide-based catalysts (Co/RM). The samples were characterized by N2 adsorption, X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), and UV-vis diffusive reflectance spectroscopy. The heterogeneous catalytic activity was evaluated in aqueous phenol degradation using peroxymonosulphate (PMS) as an oxidizing agent. It was found that Co3O4 particles were highly dispersed on the RM surface and that pretreatment of the red mud (RM-T) would significantly influence catalytic activity. Co/RM-T catalysts exhibited high effectiveness in heterogeneous activation of PMS to produce sulfate radicals for phenol degradation compared with Co/RM-NT. Phenol degradation followed first-order kinetics, and activation energies on Co/RM-T and Co/RM-NT are 46.2 and 47.0 kJ/mol, respectively.

Original languageEnglish
Pages (from-to)15351-15359
Number of pages9
JournalIndustrial and Engineering Chemistry Research
Volume51
Issue number47
DOIs
Publication statusPublished - 28 Nov 2012
Externally publishedYes

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