Degradation of phenol using Co- and Co,F-doped PbO2 anodes in electrochemical filter-press cells
Degradation of phenol using Co- and Co,F-doped PbO2 anodes in electrochemical filter-press cells
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DOI：
10.1016/j.jhazmat.2007.08.046
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发表时间：
2008-05-01
影响因子：
13.6
通讯作者：
Montiel, Vicente
中科院分区：
文献类型：
--
作者：
Andrade, Leonardo S.;Rocha-Filho, Romeu C.;Montiel, Vicente
在压滤池中使用纯 PbO2 或 F、Co、Co,F 掺杂 PbO2 电极对 H2SO4 介质中苯酚的电氧化进行了比较研究。采用含有月桂基硫酸钠作为添加剂和 Pb2+、F-、CO2 或 Co2++ F-的电解槽，在磁力搅拌（获得 4 cm(2) 电极）或超声波（获得 63 cm(2) 电极）下，通过恒电流电沉积获得氧化膜。使用掺杂低 Co 含量（电解槽中 1 MM CO2+）和 F- 的 PbO2 电极获得了最佳结果：模拟废水的化学需氧量 (COD) 和总有机碳含量 (TOC) 分别去除了约 75% 和 50%。当使用纯 PbO2 电极时，COD 和 TOC 去除率分别约为 60% 和 45%。对于较小的电极，获得的平均电流效率（ACE）和能耗（EC）分别约为16％和70 kWh kg（COD）（-1）。对于较大的电极，ACE 和 EC 值分别约为 18% 和 105 kWh kg(COD)(-1)。电极的稳定性测试表明它们适合用于苯酚废水的电化学处理。 (c) 2007 Elsevier BX 保留所有权利。
A comparative study on the electrooxidation of phenol in H2SO4 medium using pure PbO2 or F-, Co- and Co,F-doped PbO2 electrodes in filter-press cells was carried out. The oxide films were obtained by galvanostatic electrodeposition using an electrolytic bath containing sodium lauryl sulfate as additive and Pb2+, F-, CO2, or Co2+ + F-, under magnetic stirring (to obtain 4-cm(2) electrodes) or ultrasound waves (to obtain 63-cm(2) electrodes). The best results were attained with PbO2 electrodes doped with a low-Co content (1 MM CO2+ in the electrolytic bath) along with F-: the chemical oxygen demand (COD) and the total organic carbon content (TOC) of the simulated wastewaters were removed by about 75% and 50%, respectively. When pure PbO2 electrodes were used, the COD and TOC removals were about 60% and 45%, respectively. For the smaller electrodes, an average current efficiency (ACE) and an energy consumption (EC) of about 16% and 70 kWh kg(COD)(-1), respectively, were obtained. For the larger electrodes, the ACE and EC values were about 18% and 105 kWh kg(COD)(-1), respectively. Stability tests of the electrodes showed that they are suitable for use in the electrochemical treatment of phenol wastewaters. (c) 2007 Elsevier BX All rights reserved.