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首页> 外文期刊>Separation and Purification Technology >Electrosorption based waste water treatment system using activated carbon cloth electrode: Electrosorption of benzoic acid from a flow-through electrolytic cell
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Electrosorption based waste water treatment system using activated carbon cloth electrode: Electrosorption of benzoic acid from a flow-through electrolytic cell

机译：使用活性炭布电极的基于电吸附的废水处理系统：流通式电解池对苯甲酸的电吸附

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摘要

An electrosorption based waste water treatment system including specially constructed flow-through electrolytic cell was designed. Electrosorptive removal of benzoic acid (BA) from dilute aqueous solutions in 0.01 M Na2SO4 onto activated carbon cloth (ACC) electrode was carried out with this system. Kinetics of both adsorption and electrosorption were followed by an online UV-Vis spectrophotometric analysis method. The data were successfully treated according to pseudo-first-order law and rate constants were determined. Appreciable increase, compared to open circuit adsorption, was obtained in the removal rate of BA by electrosorption. Effects of operating parameters such as applied potential and volumetric flow rate on electrosorption were examined. Optimum conditions for the process were found to be 30 mL min~(-1) for flow rate and +600 mV for polarization. The capacity of ACC under these conditions for electrosorption of BA was found as 180 (mg g~(-1)) upon four successive electrosorption steps. An in-situ regeneration procedure applied at this saturation point caused 155 (mg g~(-1)) of electrosorbed BA to electrodesorb upon -900 mV polarization, corresponding to about 86% regeneration of ACC.
机译：设计了一种基于电吸附的废水处理系统，该系统包括特制的流通式电解池。用该系统将0.01M Na2SO4中的稀水溶液中的苯甲酸（BA）电吸附到活性炭布（ACC）电极上。吸附和电吸附的动力学均采用在线UV-Vis分光光度法进行分析。根据伪一阶定律成功处理了数据，并确定了速率常数。与开路吸附相比，通过电吸附去除BA的速率明显增加。检查了操作参数（如施加的电势和体积流量）对电吸附的影响。发现该过程的最佳条件为流速为30 mL min〜（-1），极化为+600 mV。在四个连续的电吸附步骤下，在这些条件下，ACC对BA的电吸附能力为180（mg g〜（-1））。在-900 mV极化时，在此饱和点进行的原位再生程序导致155（mg g〜（-1））的电吸附BA发生电吸附，相当于ACC再生的约86％。

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