Zhang Hui, Choi Heung Jin, Huang Chin-Pao
Department of Environmental Engineering, Wuhan University, P.O. Box C319 Luoyu Road 129#, Wuhan 430079, China.
J Hazard Mater. 2005 Oct 17;125(1-3):166-74. doi: 10.1016/j.jhazmat.2005.05.025.
The treatment of landfill leachate by Fenton process was carried out in a batch reactor. The effect of operating conditions such as reaction time, pH, H2O2 to Fe(II) molar ratio, Fenton's reagent dosage, initial COD strength, feeding mode, the type of polymer, and temperature on the efficacy of Fenton process was investigated. It is demonstrated that Fenton's reagent can effectively degrade leachate organics. Fenton process was so fast that it was complete in 30 min. The oxidation of organic materials in the leachate was pH dependent and the optimal pH was 2.5. The favorable H2O2 to Fe(II) molar ratio was 1.5, and organic removal increased as dosage increased at the favorable H2O2 to Fe(II) molar ratio. The efficacy of Fenton process was improved by adding Fenton's reagent in multiple steps than that in a single step. Furthermore, the stepwise addition of both hydrogen peroxide and ferrous iron was more effective than that of hydrogen peroxide only. Sludge settling characteristics were much improved with the addition of the proper polymer. Temperature gave a positive effect on organic removal.
采用间歇式反应器，通过芬顿法处理垃圾渗滤液。研究了反应时间、pH值、H₂O₂与Fe(II)的摩尔比、芬顿试剂用量、初始化学需氧量强度、进料方式、聚合物类型以及温度等操作条件对芬顿法处理效果的影响。结果表明，芬顿试剂能够有效降解渗滤液中的有机物。芬顿法反应速度很快，30分钟内即可完成。渗滤液中有机物的氧化过程与pH值有关，最佳pH值为2.5。H₂O₂与Fe(II)的最佳摩尔比为1.5，在该最佳摩尔比下，随着芬顿试剂用量的增加，有机物去除率提高。与一次性添加芬顿试剂相比，分多步添加芬顿试剂可提高芬顿法的处理效果。此外，同时分步添加过氧化氢和亚铁离子比仅添加过氧化氢更有效。添加合适的聚合物可显著改善污泥的沉降性能。温度对有机物去除有积极影响。
