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The formation of aldehydes and ketones ozonation by-products and their variation through general water treatment plant in Hamadan, Iran

  • Authors (legacy)
    Corresponding: Ali Poormohammadi, Email: ali.pormohamadi89@gmail.com/apoormohammadi000@yahoo.com, Phone: +98 831 4216143, Fax: +98 831 4223210
    Co-authors: Mohammad Taghi Samadi, Ghasem Azarian, Chin-Pao Huang, Fariba Seifipour, Din Yang and Ali Poormohammadi
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  • gnest_01633_published.pdf
  • Paper ID
    gnest_01633
  • Paper status
    Published
  • Date paper submitted
  • Date paper accepted
  • Date paper online
DOI
https://doi.org/10.30955/gnj.001633
Abstract

The effect of pre-ozonation on the formation of four aldehydes (i.e. formaldehyde, acetaldehyde, glyoxal, methyl glyoxal) and two ketones (i.e. pyruvic acid and glioxalic acid) at the Beheshti water treatment plant in Hamadan, Iran were studied. Water samples were taken from the treatment plant at different points of the treatment train during September-January, 2013. The variation of formaldehyde, acetaldehyde, glyoxal, methyl glyoxal, pyruvic acid, and acid glioxalic concentration within treatment process were monitored in September and January. The results indicated that formaldehyde and acetaldehyde were the most abundant aldehyde species in the raw water. After pre-ozonation all of the aldehydes and ketones reached the maximum concentration. On the contrary, results show that the coagulation-filtration process was beneficial to the removal of aldehydes and ketones. Also, the results indicated that the level of aldehydes was increased after post chlorination. The percent increase was 52.3, 34.6, 12.1, 26.8 and 38% for formaldehyde, acetaldehyde, glyoxal, methyl glyoxal and glyoxalic acid, respectively, in September. Therefore, final chlorination led to increase in the formation of aldehydes in the pre-ozonated water. Ketones were not detected in the post-chlorinated water. Moreover, there was no correlation between total organic carbon (TOC) and total aldehyde and total ketone in water samples. 

 

Keywords
Aldehydes Ketones Ozonation By-product
Cite this article
4223210, F. +98 831 et al. (2015) “The formation of aldehydes and ketones ozonation by-products and their variation through general water treatment plant in Hamadan, Iran”, Global NEST Journal, 17(4). Available at: https://doi.org/10.30955/gnj.001633.
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  • gnest_01633_published.pdf