Impact of catalytic ozonation with ferric hydroxide on HAAs formation potential of a filtered surface water

Tao Zhang, Jin Feng Lu, Jun Ma*, Zhong Lin Chen, Su Fang Shen, Qun Wang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

Formation potential of five haloacetic acids (HAA5FP) of a filtered surface water was studied after ozonation alone and catalytic ozonation with a ferric hydroxide (FeOOH). Factors studied were oxidation time, bromide, pH, bicarbonate alkalinity, and ozone dosages. The haloacetic acids detected were dichloroacetic acid (DCAA), trichloroacetic acid (TCAA), and dibromoacetic acid (DBAA) when bromide existed. The catalytic ozonation caused a reduction of HAA5FP of the non-bromide containing water from 9.5% to 18.3% compared to that of ozonation in 5~20 minutes. Incremental addition of bromide led to a much lower HAA5FP after catalytic ozonation than that after ozonation. HAA5FP of the water at neutral pH was higher than that at acidic and basic conditions. Catalytic ozonation showed a most advantageous potential in controlling HAA5FP over ozonation at neutral pH. The HAA5FP decreased as bicarbonate concentration increased, and the disparity between ozonation and catalytic ozonation was also reduced. The HAA5FP after catalytic ozonation was 11.2% to 28.0% lower than that after ozonation while the ratio of O3/TOC ranging from 0.45 to 1.43. The effect of catalytic ozonation on HAA5FP of the water is closely related to its enhanced generation of hydroxyl radicals in catalytic process.

Original languageEnglish (US)
Pages (from-to)1580-1585
Number of pages6
JournalHuanjing Kexue/Environmental Science
Volume27
Issue number8
StatePublished - Aug 2006
Externally publishedYes

Keywords

  • Bicarbonate
  • Bromide
  • Catalytic ozonation
  • FeOOH
  • HAA5FP
  • Ozone

ASJC Scopus subject areas

  • Environmental Engineering

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