2-Chlorophenol oxidation kinetic by photo-assisted Fenton process.
Experimental data are presented to test and validate a kinetic model for the oxidation of 2-chlorophenol wastewater by photo-assisted Fenton process. The data showed that this process had produced good effects under acidic conductions. Up to 90% 2-chlorophenol was removed after 90-minute reaction time with H2O2 of 25% COD(Cr, in), while in UV/H2O2 system only 16.8% 2-chlorophenol was removed after one hour treatment. The optimal pH in this reaction occurred between pH 3.0 and pH 4.0. The reaction kinetics for photo-assisted Fenton process experimented in this research was investigated. Kinetic models were proposed for the treatment of 2-chlorophenol wastewater. The reaction was found to follow the 2nd order. The equations of reaction kinetics are as follows: -d[RH]/dt = K(RH) [RH] [H2O2]0 exp(-K(H2O2) t); -d[COD(Cr)]/dt = K(COD(Cr)) [COD(Cr)] [H2O2]0 exp(-K' t). The prediction of the models was found to be in a good agreement with experimental results, thus confirming the proposed reaction mechanism.
Xu
Xin-hua
XH
Department of Environmental Engineering, Zhejiang University, Hangzhou 310027, China. xxh@mail.hz.zj.cn
Zhao
Wei-rong
WR
Huang
Yan-qiao
YQ
Wang
Da-hui
DH
D002733:Chlorophenols / Q000737:chemistry*; D006861:Hydrogen Peroxide / Q000737:chemistry*; D007501:Iron / Q000737:chemistry*; D007700:Kinetics; D008962:Models, Theoretical; D016877:Oxidants / Q000737:chemistry*; D010084:Oxidation-Reduction; D010777:Photochemistry; D014865:Waste Disposal, Fluid
D002733:Chlorophenols; C045076:Fenton's reagent; D016877:Oxidants; D006861:Hydrogen Peroxide; D007501:Iron; C030683:2-chlorophenol