标题：Removal of COD from landfill leachate by advanced Fenton process combined with electrolysis
作者： Wang, Z (Wang, Zhe); Li, JB (Li, Jiangbo); Tan, WH (Tan, Weihua); Wu, XG (Wu, Xiaogang); Lin, H (Lin, Heng); Zhang, H (Zhang, Hui)
来源出版物：SEPARATION AND PURIFICATION TECHNOLOGY 卷：208 期：SI 页码： 3-11 DOI：10.1016/j.seppur.2018.06.048 出版年：JAN 8 2019
摘要：Zero valent iron (ZVI) was used as the iron source for the advanced Fenton treatment of landfill leachate in an electrochemical cell. In this process, Fe-0 was dissolved from the surface of ZVI powder and then the generated Fe2+ would activate the added H2O2 to produce hydroxyl radical ((OH)-O-center dot), which is a strong oxidant and can lead to the removal of COD from landfill leachate. The effect of initial pH, H2O2 dosage, Fe-0 dosage, current density and inter-electrode gap on the COD removal of landfill leachate was investigated. The results indicate that COD removal followed pseudo-second order kinetic model. The rate constant and efficiency of COD removal increased with Fe-0 dosage being increased from 0.524 to 1.745 g/L, but decreased when initial pH rose from 2 to 4. The optimal conditions of H2O2 dosage, current density and inter-electrode gap were determined to be 0.187 mol/L, 20.6 mA/cm(2) and 1.8 cm, respectively. The humic acid-like organics in the leachate were effectively degraded and over 70% of COD could be removed from the leachate, showing high efficiency of the electro-advanced Fenton process.
作者关键词： Landfill leachate; Advanced Fenton; Zero-valent iron; Electrochemical; COD removal
通讯作者地址：Zhang, H (reprint author), Wuhan Univ, Hubei Environm Remediat Mat Engn Technol Res Ctr, Dept Environm Sci & Engn, Wuhan 430079, Hubei, Peoples R China.
[Wang, Zhe; Li, Jiangbo; Tan, Weihua; Wu, Xiaogang; Lin, Heng; Zhang, Hui] Wuhan Univ, Hubei Environm Remediat Mat Engn Technol Res Ctr, Dept Environm Sci & Engn, Wuhan 430079, Hubei, Peoples R China.
[Wu, Xiaogang] Yangtze Univ, Sch Urban Construct, Jingzhou 434023, Peoples R China.
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