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ISSN : 1225-4517(Print)
ISSN : 2287-3503(Online)
Journal of Environmental Science International Vol.29 No.1 pp.69-77

A Study on Oxidative Degradation of Chlorophenols by Heat Activated Persulfate

JiMin Son,Hee-Won Kwon,Inseong Hwang1),Jeong-Jin Kim2),Young-Hun Kim*
Department of Environmental Engineering, Andong National University, Andong 36729, Korea
1)Department of Civil and Environmental Engineering, Pusan National University, Busan 46241, Korea
2)Department of Earth and Environmental Sciences, Andong National University, Andong 36729, Korea
*Corresponding author: Young-Hun Kim, Department of Environ -mental Engineering, Andong National University, Andong 36729, Korea Phone : +82-54-820-5818


Oxidative degradation of phenol, three monochlorophenols (2-chlorophenol, 2-CP; 3-chlorophenol, 3-CP; 4-chlorophenol, 4-CP), four dichlorophenols (2,3-dichlorophenol, 2,3-DCP; 2,4-dichlorophenol, 2,4-DCP; 2,5-dichlorophenol, 2,5-DCP; 2,6-dichlorophenol, 2,6-DCP), and two trichlorophenols (2,4,5-trichlorophenol, 2,4,5-TCP; 2,4,6-trichlorophenol, 2,4,6-TCP) was conducted with heat activated persulfate. As the number of chlorinations increased, the reaction rate also increased. The reaction rate was relatively well fitted to the zero-order kinetic model, rather than the pseudo-first order kinetic model for the reactions at 60℃, which can be explained by insufficient activation of the persulfate at 60℃, and the oxidation reaction of 2,4,6-TCP at 70℃ was relatively well fitted to the pseudo-first order kinetic model. The oxidation reaction rate generally increased with increase of persulfate concentration in the solution. 2,6-dichloro-2,5-cyclohexadiene-1,4-dione was found as a degradation product in a GC/MS analysis. This compound is a non-aromatic compound, and one chlorine was removed. This result is similar to the result of previous studies. The current study proved that heat activated persulfate activation could be an alternative remediation technology for phenol and chlorophenols in soil and groundwater.

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