TY - JOUR
T1 - Oxidation of chlorothalonil in aqueous solution by means of UV, H 2O 2/UV, oxalate/UV, and oxalate-assisted H 2O 2/UV irradiation
AU - Choi, Jong Duck
AU - Lee, Tae Jin
PY - 2004/9
Y1 - 2004/9
N2 - The degradation of chlorothalonil was explored using UV, H 2O 2/UV, Oxalate/UV, and oxalate-assisted H 2O 2/UV irradiation. The optimum initial hydrogen peroxide and oxalate concentrations in the photolysis were about 100 mg L -1 and 1 mM, respectively. The optimum pseudo-first-order reaction rate constants for UV (k UV), H 2O 2/UV (kH 2O 2), oxalate/UV (k oxalate), and oxalate-assisted H 2O 2/UV (kH 2O 2-oxalate) irradiation processes were 0.186, 0.357, 0.520, and 1.806 min -1, respectively. A TOC analysis of the solution indicates that chlorothalonil is largely decomposed to carbon dioxide by the oxalate-assisted H 2O 2/UV irradiation process. In our experiments, the oxalate-assisted H 2O 2/UV irradiation process was the most effective method for the degradation of chlorothalonil relative to the use of UV alone or the H 2O 2/UV irradiation processes.
AB - The degradation of chlorothalonil was explored using UV, H 2O 2/UV, Oxalate/UV, and oxalate-assisted H 2O 2/UV irradiation. The optimum initial hydrogen peroxide and oxalate concentrations in the photolysis were about 100 mg L -1 and 1 mM, respectively. The optimum pseudo-first-order reaction rate constants for UV (k UV), H 2O 2/UV (kH 2O 2), oxalate/UV (k oxalate), and oxalate-assisted H 2O 2/UV (kH 2O 2-oxalate) irradiation processes were 0.186, 0.357, 0.520, and 1.806 min -1, respectively. A TOC analysis of the solution indicates that chlorothalonil is largely decomposed to carbon dioxide by the oxalate-assisted H 2O 2/UV irradiation process. In our experiments, the oxalate-assisted H 2O 2/UV irradiation process was the most effective method for the degradation of chlorothalonil relative to the use of UV alone or the H 2O 2/UV irradiation processes.
KW - Chlorothalonil
KW - Hydrogen peroxide
KW - Oxalate
KW - Photolysis
UR - http://www.scopus.com/inward/record.url?scp=28744449207&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:28744449207
SN - 1226-086X
VL - 10
SP - 701
EP - 704
JO - Journal of Industrial and Engineering Chemistry
JF - Journal of Industrial and Engineering Chemistry
IS - 5
ER -