Anotai Jin, Lu Ming-Chun, Chewpreecha Parichat
NRC for Environmental and Hazardous Waste Management, Department of Environmental Engineering, King Mongkut's University of Technology, Thonburi, Bangkok 10140, Thailand.
Water Res. 2006 May;40(9):1841-7. doi: 10.1016/j.watres.2006.02.033. Epub 2006 Apr 18.
Aniline degradation at pH 2 by Fenton and electro-Fenton processes was kinetically investigated in this study. Electro-Fenton process was found to be superior to ordinary Fenton process with the current impacts of 1.2 to 3.1 for removal efficiency and 1.2 to 5.8 for degradation rate depending on initial Fe2+ concentration. This is mainly due to the rapid electrochemical regeneration of Fe2+. Overall rate equations for aniline degradation by Fenton and electro-Fenton processes (in units of molar and minute) are: [EQUATION: SEE TEXT]. With current application, aniline degradation rate seems to be autonomous from Fenton's reagent concentrations and approaching a half order with respect to aniline. In addition, for complete removal of 0.01 M aniline, the delay in current supply at the initial stage could save up to one-third of the total energy required by the ordinary electro-Fenton process. As a result, significant reduction in energy consumption and operating cost could be obtained by the current-delay operating mode.
本研究对芬顿法和电芬顿法在pH为2时降解苯胺的动力学进行了研究。结果发现，电芬顿法优于普通芬顿法，根据初始Fe2+浓度的不同，电流对去除效率的影响为1.2至3.1，对降解速率的影响为1.2至5.8。这主要是由于Fe2+的快速电化学再生。芬顿法和电芬顿法降解苯胺的总速率方程（单位为摩尔和分钟）为：[方程：见文本]。施加电流后，苯胺降解速率似乎与芬顿试剂浓度无关，且相对于苯胺接近半级反应。此外，为了完全去除0.01 M的苯胺，初始阶段延迟供电最多可节省普通电芬顿法所需总能量的三分之一。因此，采用电流延迟操作模式可显著降低能耗和运行成本。
