Enhanced adsorption of diclofenac sodium on the carbon nanotubes-polytetrafluorethylene electrode and subsequent degradation by electro-peroxone treatment
Enhanced adsorption of diclofenac sodium on the carbon nanotubes-polytetrafluorethylene electrode and subsequent degradation by electro-peroxone treatment
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双氯芬酸钠在碳纳米管-聚四氟乙烯电极上的增强吸附和电过氧化氢处理的后续降解
DOI：
10.1016/j.jcis.2016.11.001
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发表时间：
2017-02-15
影响因子：
9.9
通讯作者：
Yu, Gang
中科院分区：
文献类型：
--
作者：
Huang, Qian;Deng, Shubo;Yu, Gang
药物的有效吸附，然后在再生过程中对其进行降解，使其完全从水或废水中去除，是一种很有吸引力的方法。在外加电压的作用下，双氯芬酸钠(DS)在碳纳米管-聚四氟乙烯(CNTS-PTFE)阳极上的吸附得到增强。与开路吸附相比，静态吸附实验中DS的初始吸附速率和吸附量分别提高了2.1倍和1.2倍。吸附后，碳纳米管-聚四氟乙烯阳极转变为阴极，原位降解吸附的DS，并在10min后用电过氧化氢处理全部降解DS。随着臭氧浓度和电流强度的增加，DS的矿化效率提高，在10 0 mA和2 7 mg/L O-3下处理1h，DS达到完全矿化。再生后的碳纳米管-聚四氟乙烯电极在5次吸附-降解循环中保持了对DS的稳定吸附能力。这种碳纳米管-聚四氟乙烯电极通过电吸附和随后的氧化降解来去除水或废水中的药物，而电-过氧化氢工艺是再生废电极和矿化吸附污染物的有效方法。(C)2016 Elsevier Inc.保留所有权利。
Effective adsorption of pharmaceuticals and then degradation of them in the regeneration process are attractive for their complete removal from water or wastewater. The adsorption of diclofenac sodium (DS) on the prepared carbon nanotubes-polytetrafluorethylene (CNTs-PTFE) anode was enhanced in the presence of applied voltage. Compared with open circuit adsorption, the initial adsorption rate and adsorbed amount of DS in static adsorption experiments increased 2.1 and 1.2 times, respectively. After adsorption, the CNTs-PTFE anode was changed to cathode to in-situ degrade the adsorbed DS, and all DS was degraded after 10 min using the electro-peroxone treatment. The mineralization efficiency increased with increasing ozone concentrations and current intensity, and complete mineralization of DS was achieved at 100 mA and 27 mg/L O-3 after 1 h treatment. The regenerated CNTs-PTFE electrode kept stable adsorption capacity for DS in five adsorption-degradation cycles. This CNTs-PTFE electrode has a promising application for the removal of pharmaceuticals from water or wastewater via the electrosorption and subsequent oxidative degradation, and the electro-peroxone process is an effective method to regenerate the spent electrode and mineralize the adsorbed pollutants. (C) 2016 Elsevier Inc. All rights reserved.