Effective inhibition of bromate formation with a granular molecular sieve catalyst Ce-MCM-48 during ozonation: Pilot-scale study

Zhimin Qiang*, Fenglin Cao, Wencui Ling, Tao Zhang, Weiwei Li

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

The inhibition of bromate (BrO3 -) formation during ozonation with a novel granular molecular sieve catalyst, Ce-MCM-48, was investigated in pilot-scale under simulated practical conditions by varying the initial bromide (Br-) concentration, total organic carbon (TOC) content, aqueous ozone concentration, water pH, and hydraulic retention time (HRT). The results indicate that the inhibition efficiency of Ce-MCM-48 for BrO3 - formation could reach 82-90% as the initial Br- concentration varied from 200-800 μg/L under typical water treatment conditions: Aqueous ozone concentration=2.0±0.1 mg/L, HRT=10 min, initial pH=7.7-7.9, and T=18±2 °C. The extension of HRT from 10 to 20 min and pH variation in the range of 6.0-9.0 had insignificant impact on the inhibition efficiency of BrO3 - formation. Compared with ozonation alone, the catalytic ozonation could achieve almost the same efficiencies for TOC removal and Escherichia coli inactivation. A long-term continuous operation experiment for 33 days demonstrated that the granular catalyst Ce-MCM-48 possesses not only a high efficiency, but also a large treatment capacity for minimizing BrO 3 - formation during the ozonation process, and thus has potential applications to water treatment.

Original languageEnglish (US)
Pages (from-to)235-240
Number of pages6
JournalJournal of Environmental Engineering (United States)
Volume139
Issue number2
DOIs
StatePublished - Feb 1 2013
Externally publishedYes

Keywords

  • Control
  • Drinking water
  • Oxidation
  • Ozone
  • Water treatment

ASJC Scopus subject areas

  • Environmental Engineering
  • Environmental Science(all)
  • Environmental Chemistry
  • Civil and Structural Engineering

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