TY - JOUR
T1 - Ozonation of haloacetic acid precursor using phenol as a model compound
T2 - Effect of ozonation by-products
AU - Oh, B. S.
AU - Kim, K. S.
AU - Kang, J. W.
PY - 2006/7/6
Y1 - 2006/7/6
N2 - The formation pattern of haloacetic acids (HAAs) was investigated using phenol as a model precursor of HAAs, and the oxidation by-products formed from phenol ozonation, such as hydroquinone, catechol, glyoxal, glyoxylic acid and oxalic acid, were also chlorinated to measure the HAAs formation potential (HAAFP). Of these, phenol showed the highest reactivity with chlorine, yielding the most HAAFP. Even though HAAFP of the tested by-products was lower than that of phenol, it was confirmed that all by-products can act as the precursor of HAAs. Regarding the ozonation of phenol-containing water, the efficiency of ozone in controlling HAAs can be reduced by the formation of oxidation by-products. When comparing conditions for pH 7 and 3, the ozonation for pH 7 was more effective in removing the overall HAA precursors than the ozonation for pH 3. This result was attributed to complete oxidation by the production of the secondary oxidant, such as the OH radical (OH·) from ozone decay, and ionization of phenol.
AB - The formation pattern of haloacetic acids (HAAs) was investigated using phenol as a model precursor of HAAs, and the oxidation by-products formed from phenol ozonation, such as hydroquinone, catechol, glyoxal, glyoxylic acid and oxalic acid, were also chlorinated to measure the HAAs formation potential (HAAFP). Of these, phenol showed the highest reactivity with chlorine, yielding the most HAAFP. Even though HAAFP of the tested by-products was lower than that of phenol, it was confirmed that all by-products can act as the precursor of HAAs. Regarding the ozonation of phenol-containing water, the efficiency of ozone in controlling HAAs can be reduced by the formation of oxidation by-products. When comparing conditions for pH 7 and 3, the ozonation for pH 7 was more effective in removing the overall HAA precursors than the ozonation for pH 3. This result was attributed to complete oxidation by the production of the secondary oxidant, such as the OH radical (OH·) from ozone decay, and ionization of phenol.
UR - http://www.scopus.com/inward/record.url?scp=33745641290&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=33745641290&partnerID=8YFLogxK
U2 - 10.2166/ws.2006.072
DO - 10.2166/ws.2006.072
M3 - Article
AN - SCOPUS:33745641290
VL - 6
SP - 215
EP - 222
JO - Water Science and Technology: Water Supply
JF - Water Science and Technology: Water Supply
SN - 1606-9749
IS - 2
ER -