作者：Zhang, Hui ;Wu, Xiaogang ;Li, Xianwang

来源出版物：CHEMICAL ENGINEERING JOURNAL卷：210 页：188-194 出版年：NOV 1 2012

摘要：COD removal by oxidation as well as by coagulation during Fered-Fenton treatment of landfill leachate was quantitatively determined in this study. The effects of operating conditions such as H2O2 to Fe2+ mole ratio. Fenton's reagent dosage, initial pH, current density, inter-electrode gap and hydrogen peroxide feeding mode on COD removal was investigated. The results showed that COD removal by oxidation is dominant due to the high H2O2/Fe2+ mole ratio employed and the overall COD removal showed the same behavior as oxidation removal. The coagulation removal of COD increased with initial pH and ferrous iron dosage, but it was independent of current density and the inter-electrode gap at a fixed initial pH value and ferrous iron dose. Increasing Fenton's reagent dosage or decreasing the initial pH is likely to promote COD removal by oxidation. There existed an optimal H2O2/Fe2+ mole ratio, current density or inter-electrode gap to reach the highest COD removal efficiency by oxidation. The stepwise or continuous addition of hydrogen peroxide was more effective to oxidize organics than a single dose of hydrogen peroxide. Nearly all the organic compounds (>4 kDa) were degraded into smaller ones after Fered-Fenton treatment. GC-MS analysis was used to determine the organic compounds before and after the treatment.

文献类型：Article

语种：English

作者关键词：Landfill leachate; Fered-Fenton; COD removal; Oxidation; Coagulation; GC-MS

扩展关键词：SIZE DISTRIBUTION ANALYSIS; ELECTRO-FENTON; WASTE-WATER; HYDROGEN-PEROXIDE;PHOTO-FENTON;REAGENT;MINERALIZATION;FRACTIONATION; OPTIMIZATION; DEGRADATION

通讯作者地址：Zhang, H,Wuhan Univ, Hubei Biomass Resource Chem & Environm Biotechnol, Dept Environm Engn, POB C319,Luoyu Rd 129, Wuhan 430079, Peoples R China.

地址：

[Zhang, Hui ;Wu, Xiaogang ;Li, Xianwang]Wuhan Univ, Hubei Biomass Resource Chem & Environm Biotechnol, Dept Environm Engn, Wuhan 430079, Peoples R China

[Wu, Xiaogang] Yangtze Univ, Sch Chem & Environm Engn, Jinzhou 434023, Hubei, Peoples R China

[Li, Xianwang] China City Environm Protect Engn Ltd Co, Wuhan 430071, Peoples R China

电子邮件地址eeng@whu.edu.cn

学科类别：Engineering