Treatment of landfill leachate by Fenton's reagent in a continuous stirred tank reactor.
The treatment of landfill leachate by Fenton process was carried out in a continuous stirred tank reactor (CSTR). The effect of operating conditions such as reaction time, hydraulic retention time, pH, H(2)O(2) to Fe(II) molar ratio, Fenton's reagent dosage, initial COD strength, and temperature on the efficacy of Fenton process was investigated. It is demonstrated that Fenton's reagent can effectively degrade leachate organics. Fenton process reached the steady state after three times of hydraulic retention. The oxidation of organic materials in the leachate was pH dependent and the optimal pH was 2.5. The favorable H(2)O(2) to Fe(II) molar ratio was 3, and organic removal increased as dosage increased at the favorable H(2)O(2) to Fe(II) molar ratio. Temperature gave a positive effect on organic removal.
Zhang
Hui
H
Department of Environmental Engineering, Wuhan University, P.O. Box C319, Luoyu Road 129, Wuhan 430079, China. eeng@whu.edu.cn
Choi
Heung Jin
HJ
Huang
Chin-Pao
CP
D004785:Environmental Pollutants / Q000032:analysis*; D006861:Hydrogen Peroxide / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D007501:Iron / Q000737:chemistry*; D010084:Oxidation-Reduction; D010100:Oxygen / Q000737:chemistry; D012037:Refuse Disposal; D013696:Temperature
D004785:Environmental Pollutants; C045076:Fenton's reagent; D006861:Hydrogen Peroxide; D007501:Iron; D010100:Oxygen