Centro de Investigación y Desarrollo Tecnológico en Electroquímica, CIDETEQ, Pedro Escobedo, P.O. Box 064, Querétaro, 76703, Mexico.
Centro de Investigación y Desarrollo Tecnológico en Electroquímica, CIDETEQ, Pedro Escobedo, P.O. Box 064, Querétaro, 76703, Mexico. Electronic address: http://www.cideteq.mx.
Chemosphere. 2018 May;199:251-255. doi: 10.1016/j.chemosphere.2018.02.036. Epub 2018 Feb 8.
A novel arrangement for an electro-Fenton reactor aimed to treat neutral wastewater is presented. The arrangement consists on three-compartments in series, two of them packed with a cation exchange resin and one positioned between these, containing a polarized activated carbon column where the electrochemical generation of the Fenton reagent takes place. While the hydroxyl radicals electrochemically produced in-situ, react with the pollutant species adsorbed on the activated carbon cathode, the resin compartments administrate and collect the iron cation and the hydrated proton species in alternating flow direction cycles. The resulting process is a system that does not require acid or iron chemical addition to the process while at the same time, renders decontaminated water free of iron-dissolved species at neutral pH. The proposed electrochemical reactor arrangement is therefore the basis for the design of commercially viable electro-Fenton reactors in which the addition and subsequent removal of acid and iron chemicals is avoided; two of the currently most limiting features for the development of electro-Fenton technology for treating wastewater.
提出了一种用于处理中性废水的电芬顿反应器的新布置。该布置由串联的三个隔室组成，其中两个隔室填充阳离子交换树脂，另一个隔室位于这两个隔室之间，其中包含一个极化活性炭柱，在该柱中发生芬顿试剂的电化学生成。当原位电化学产生的羟基自由基与吸附在活性炭阴极上的污染物物种反应时，树脂隔室以交替的流动方向循环管理和收集铁阳离子和水合质子物种。由此产生的过程是一种不需要向过程中添加酸或铁化学品的系统，同时，在中性 pH 值下使处理过的水不含溶解的铁物种。因此，所提出的电化学反应器布置是设计商业可行的电芬顿反应器的基础，在该反应器中避免了酸和铁化学品的添加和随后的去除；这是电芬顿技术用于处理废水的两个最具限制的特征。
