Selection of supported cobalt substrates in the presence of oxone for the oxidation of monuron

Wei Chu, W. K. Choy, C. Y. Kwan

Research output: Journal article publicationJournal articleAcademic researchpeer-review

26 Citations (Scopus)

Abstract

The immobilization of cobalt ion on different media to catalyze oxone has been investigated. A probe herbicide, Monuron, was effectively degraded by using Co2+/oxone systems. For Co2+supported on zeolite, 100% of Monuron could be removed within a 10 min reaction time. However, the recycling of the spent Co-zeolite catalyst using various posttreatments did not give a promising result. This is likely because the zeolite particles in solution have blocked and significantly attenuated the incident UV light from reducing Co3+to Co2+. On the contrary, the use of cationic resin has minimized these problems. In the process of Co-resin/oxone/UV, faster Monuron decay could be achieved than that in the dark reaction. In the presence of UV, a significant drop of total organic carbon (TOC) was also observed in this approach suggesting an effective and clean process for Monuron mineralization.
Original languageEnglish
Pages (from-to)5708-5713
Number of pages6
JournalJournal of Agricultural and Food Chemistry
Volume55
Issue number14
DOIs
Publication statusPublished - 11 Jul 2007

Keywords

  • Cobalt chloride
  • Monuron
  • Oxidation
  • Oxone
  • Sulfate radicals

ASJC Scopus subject areas

  • Chemistry(all)
  • Agricultural and Biological Sciences(all)

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