| Title |
A Study on the Variation of HAA Precursors by Ozonation of Phenol |
| Authors |
오병수 ( Byung Soo Oh ) ; 김경숙 ( Kyoung Suk Kim ) ; 강준원 ( Joon Wun Kang ) |
| Keywords |
Haloacetic acid formation potential; HAAFP; Ozonation; Oxidation by-product; Phenol |
| Abstract |
The purpose of this study was to find out the effect of oxidation by-products for the formation of haloacetic acid (HAA) during ozonation. The phenol was used as a model precursor of HAA, and its oxidation by-products, such as hydroquinone, catechol, glyoxal, glyoxylic acid and oxalic acid were investigated to find out how much HAA formation potential (HAAFP) they have. As the result, among the phenol and its oxidation by-products, the highest reactivity with chlorine was found from the phenol, showing the highest HAAFP. Even though the tested by-products had a lower HAAFP than phenol, it was confirmed that all of them can act as the precursor of HAA. From the ozonation of phenol-containing water, it was found that the efficiency of ozone in controlling of HAAs can be reduced due to the oxidation by-products. In addition, the ozonation of HAAFP was performed under the both pH conditions (acid and base), and the result indicates that OH radical play a important role to decrease HAAFP. |