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Activated carbon supported cobalt catalysts for advanced oxidation of organic contaminants in aqueous solution

Paper ID Volume ID Publish Year Pages File Format Full-Text
47035 46456 2010 6 PDF Available
Title
Activated carbon supported cobalt catalysts for advanced oxidation of organic contaminants in aqueous solution
Abstract

A heterogeneous cobalt catalyst was prepared by impregnation of cobalt ion on an activated carbon (AC) and used to activate peroxymonosulphate (PMS) for advanced oxidation of phenol in aqueous solution. The Co/AC catalyst was characterised by several techniques such as XRD, EDS, SEM, and TGA. It was found that Co2O3 was the major form of Co species and was homogeneously distributed on the activated carbon surface. Co/AC exhibited high activity in oxidation of phenol with sulphate radicals and 100% decomposition and 80% TOC removal could be achieved in 60 min at the conditions of 500 ml phenol solution of 25 ppm, 0.1 g catalyst and 1 g peroxymonosulphate. The catalyst also exhibited stable performance after several rounds of regeneration. Several operational parameters such as catalyst and oxidant amount, temperature on the rate of oxidation were found to influence the phenol oxidation.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideResearch highlights▶ Activated carbon (AC) shows both adsorption and activation of peroxymonosulphate. ▶ Co/AC exhibits comparable activity of heterogeneous phenol oxidation to homogeneous system. ▶ Co/AC also demonstrates highly stable performance in heterogeneous oxidation.

Keywords
Activated carbon; Cobalt; Phenol; Advanced oxidation process; Water treatment
First Page Preview
Activated carbon supported cobalt catalysts for advanced oxidation of organic contaminants in aqueous solution
Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 100, Issues 3–4, 20 October 2010, Pages 529–534
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis