Catalytic degradation of caffeine in aqueous solutions by cobalt-MCM41 activation of peroxymonosulfate

Fei Qi, Wei Chu, Bingbing Xu

Research output: Journal article publicationJournal articleAcademic researchpeer-review

105 Citations (Scopus)

Abstract

In this study, the performance of caffeine degradation and mineralization in aqueous phase by a catalyst that was prepared by incorporating cobalt into the structure of MCM41 (i.e. Co-MCM41) in activating peroxymonosulfate (PMS) was explored. Experimental results showed that Co-MCM41 activated PMS not only degraded caffeine, but also mineralized the corresponding intermediates successfully. The surface and structure properties of Co-MCM41 were characterized by several analytical methods. The leaching of cobalt ions in this process was very low, and the heterogeneous reaction dominated the caffeine decay rather than the homogeneous one, which made the reuse of catalyst highly feasible. According to the result of using quenchers, both OHand SO4-were found in this process and the latter was the major oxidant species. Furthermore, nine major intermediates generated in this process were identified and the degradation pathway was proposed.
Original languageEnglish
Pages (from-to)324-332
Number of pages9
JournalApplied Catalysis B: Environmental
Volume134-135
DOIs
Publication statusPublished - 2 May 2013

Keywords

  • Advanced oxidation process
  • Caffeine
  • Co incorporated MCM41
  • Peroxymonosulfate activation
  • Sulfate radicals

ASJC Scopus subject areas

  • Catalysis
  • Environmental Science(all)
  • Process Chemistry and Technology

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