Reduction of low-MW model compounds by ozonation and O3/UV processes

E. E. Chang, P. C. Chiang, I. S. Li

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

In this investigation, the low-molecular-weight organic matters, such as resorcinol, phloroglucinol, and p-hydroxybenzoic acid, were selected as organic precursors during the ozonation and chlorination processes. The research work focused on evaluating the effects of hydroxyl radical and ozone molecule on the reduction of organic precursors and disinfection by-products (DBP) formation, and assessing the carcinogenic risk with respect to DBP formation potentials between ozonation and O3/UV processes. The two-stages ozone decomposition model, [O3]=[O3]0 {Fe-K1-t+(1-F) e-K2-t}, was developed throughout this investigation. In addition, a linear correlation between alkalinity and hydroxyl radical was found in the course of ozonation process. The destruction of organic precursors by hydroxyl radical exhibits better performance than that by ozone. According to the risk assessment on the ozonation process, water samples treated by the O3/UV and O3 (pH 5) process exhibit the lower risk. Therefore, both the O3/UV and ozonation processes with proper operation can reduce the organic precursors, thereby providing safe drinking water.

Original languageEnglish
Pages (from-to)20-27
Number of pages8
JournalPractice Periodical of Hazardous, Toxic, and Radioactive Waste Management
Volume11
Issue number1
DOIs
Publication statusPublished - Jan 2007

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Keywords

  • Chlorination
  • Organic matter
  • Ozonization
  • Risk management

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology
  • Chemical Engineering(all)
  • Environmental Engineering
  • Water Science and Technology
  • Waste Management and Disposal
  • Environmental Science(all)

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