Department of Environmental Engineering, Hubei Biomass-Resource Chemistry and Environmental Biotechnology Key Laboratory, Wuhan University, P.O. Box C319, Luoyu Road 129#, Wuhan 430079, China.
J Hazard Mater. 2012 Nov 30;241-242:259-66. doi: 10.1016/j.jhazmat.2012.09.040. Epub 2012 Sep 25.
The treatment of mature landfill leachate by EF-Fere (also called Fered-Fenton) method was carried out in a continuous stirred tank reactor (CSTR) using Ti/RuO(2)-IrO(2)-SnO(2)-TiO(2) mesh anodes and Ti mesh cathodes. The effects of important parameters, including initial pH, inter-electrode gap, H(2)O(2) to Fe(2+) molar ratio, H(2)O(2) dosage and hydraulic retention time, on COD removal were investigated. The results showed that the complete mixing condition was fulfilled in the electrochemical reactor employed in this study and COD removal followed a modified pseudo-first order kinetic model. The COD removal efficiency increased with the decrease of H(2)O(2) to Fe(2+) molar ratio and hydraulic retention time. There existed an optimal inter-electrode gap or H(2)O(2) dosage so that the highest COD removal was achieved. Nearly the same COD removal was obtained at initial pH 3 and 5, but the steady state was quickly achieved at initial pH 3. The organic pollutants in the leachate were analyzed through a gas chromatography coupled with mass spectrometry (GC-MS) system. About 73 organics were detected in the leachate, and 52 of which were completely removed after EF-Fere process.
采用 Ti/RuO2-IrO2-SnO2-TiO2 网片阳极和 Ti 网片阴极在连续搅拌槽式反应器（CSTR）中用 EF-Fere（也称为 Fered-Fenton）法处理成熟垃圾渗滤液。考察了初始 pH 值、电极间距离、H2O2 与 Fe2+摩尔比、H2O2 用量和水力停留时间等重要参数对 COD 去除率的影响。结果表明，所用电化学反应器满足完全混合条件，COD 去除遵循修正的拟一级动力学模型。COD 去除率随 H2O2 与 Fe2+摩尔比和水力停留时间的降低而增加。存在最佳的电极间距离或 H2O2 用量，可实现最高的 COD 去除率。初始 pH 值为 3 和 5 时，COD 去除率相近，但初始 pH 值为 3 时可快速达到稳定状态。通过气相色谱-质谱联用（GC-MS）系统对渗滤液中的有机污染物进行了分析。在渗滤液中检测到约 73 种有机物，EF-Fere 工艺处理后其中 52 种完全去除。
