Tio2 and carbon nanotubes composites modify capacitive deionization anodes to improve the dechlorination efficiency in desulfurization wastewater

A new capacitive deionization (CDI) technology was used to remove Cl− from desulfurization wastewater. TiO2 and carbon nanotubes (CNTs) were combined with N-methyl pyrrolidone (NMP) to form composites by a solvothermal method in which it is coated onto the CDI anode to improve dechlorination efficie...

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Autores principales:	Shuangchen Ma, Chang Liu, Yongyi Xu, Yu Tan, Dingchang Yang, Feng Wang, Lan Ma
Formato:	article
Lenguaje:	EN
Publicado:	IWA Publishing 2021
Materias:	capacitive deionization dechlorination performance desulfurization wastewater tio2/cnts composites Environmental technology. Sanitary engineering TD1-1066
Acceso en línea:	https://doaj.org/article/04836e304b5745838364bf155c995bf0
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spelling	oai:doaj.org-article:04836e304b5745838364bf155c995bf02021-11-06T11:20:21ZTio2 and carbon nanotubes composites modify capacitive deionization anodes to improve the dechlorination efficiency in desulfurization wastewater0273-12231996-973210.2166/wst.2021.315https://doaj.org/article/04836e304b5745838364bf155c995bf02021-09-01T00:00:00Zhttp://wst.iwaponline.com/content/84/5/1228https://doaj.org/toc/0273-1223https://doaj.org/toc/1996-9732A new capacitive deionization (CDI) technology was used to remove Cl− from desulfurization wastewater. TiO2 and carbon nanotubes (CNTs) were combined with N-methyl pyrrolidone (NMP) to form composites by a solvothermal method in which it is coated onto the CDI anode to improve dechlorination efficiency (DE). The morphology, surface area, wettability, crystal structure and chemical composition of the TiO2/CNTs were characterized. They showed good hydrophilicity (contact angle: 85.9°), high specific surface area (96.68 m²/g) and high specific capacitance (87.6 F/g). The experimental results illustrated that the best DE was achieved by the composites (60%T/C) under 1.2 V with the maximum electrosorption capacity toward 6.5 mg/g, and the TiO2/CNTs composites had excellent stability. Adsorption kinetics analysis was explored and analyzed. Furthermore, TiO2/CNTs composites exhibited excellent DE in actual desulfurization wastewater. The catalysis and adsorption mechanisms of the TiO2/CNTs anode were discussed in detail. This study provides a new direction for the application of TiO2/CNTs composites as adsorption materials of CDI in the Cl− of desulfurization wastewater. HIGHLIGHTS The TiO2/CNTs materials were used as adsorption materials for a CDI anode to remove Cl− from desulfurization wastewater.; TiO2/CNTs were synthesized by using a solvothermal method based on Ti4+ combining NMP along with CNTs as precursor solution.; This study will provide a new direction for the application of TiO2/CNTs composite material as adsorption materials for CDI in actual desulfurization wastewater.;Shuangchen MaChang LiuYongyi XuYu TanDingchang YangFeng WangLan MaIWA Publishingarticlecapacitive deionizationdechlorination performancedesulfurization wastewatertio2/cnts compositesEnvironmental technology. Sanitary engineeringTD1-1066ENWater Science and Technology, Vol 84, Iss 5, Pp 1228-1244 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	capacitive deionization dechlorination performance desulfurization wastewater tio2/cnts composites Environmental technology. Sanitary engineering TD1-1066
spellingShingle	capacitive deionization dechlorination performance desulfurization wastewater tio2/cnts composites Environmental technology. Sanitary engineering TD1-1066 Shuangchen Ma Chang Liu Yongyi Xu Yu Tan Dingchang Yang Feng Wang Lan Ma Tio2 and carbon nanotubes composites modify capacitive deionization anodes to improve the dechlorination efficiency in desulfurization wastewater
description	A new capacitive deionization (CDI) technology was used to remove Cl− from desulfurization wastewater. TiO2 and carbon nanotubes (CNTs) were combined with N-methyl pyrrolidone (NMP) to form composites by a solvothermal method in which it is coated onto the CDI anode to improve dechlorination efficiency (DE). The morphology, surface area, wettability, crystal structure and chemical composition of the TiO2/CNTs were characterized. They showed good hydrophilicity (contact angle: 85.9°), high specific surface area (96.68 m²/g) and high specific capacitance (87.6 F/g). The experimental results illustrated that the best DE was achieved by the composites (60%T/C) under 1.2 V with the maximum electrosorption capacity toward 6.5 mg/g, and the TiO2/CNTs composites had excellent stability. Adsorption kinetics analysis was explored and analyzed. Furthermore, TiO2/CNTs composites exhibited excellent DE in actual desulfurization wastewater. The catalysis and adsorption mechanisms of the TiO2/CNTs anode were discussed in detail. This study provides a new direction for the application of TiO2/CNTs composites as adsorption materials of CDI in the Cl− of desulfurization wastewater. HIGHLIGHTS The TiO2/CNTs materials were used as adsorption materials for a CDI anode to remove Cl− from desulfurization wastewater.; TiO2/CNTs were synthesized by using a solvothermal method based on Ti4+ combining NMP along with CNTs as precursor solution.; This study will provide a new direction for the application of TiO2/CNTs composite material as adsorption materials for CDI in actual desulfurization wastewater.;
format	article
author	Shuangchen Ma Chang Liu Yongyi Xu Yu Tan Dingchang Yang Feng Wang Lan Ma
author_facet	Shuangchen Ma Chang Liu Yongyi Xu Yu Tan Dingchang Yang Feng Wang Lan Ma
author_sort	Shuangchen Ma
title	Tio2 and carbon nanotubes composites modify capacitive deionization anodes to improve the dechlorination efficiency in desulfurization wastewater
title_short	Tio2 and carbon nanotubes composites modify capacitive deionization anodes to improve the dechlorination efficiency in desulfurization wastewater
title_full	Tio2 and carbon nanotubes composites modify capacitive deionization anodes to improve the dechlorination efficiency in desulfurization wastewater
title_fullStr	Tio2 and carbon nanotubes composites modify capacitive deionization anodes to improve the dechlorination efficiency in desulfurization wastewater
title_full_unstemmed	Tio2 and carbon nanotubes composites modify capacitive deionization anodes to improve the dechlorination efficiency in desulfurization wastewater
title_sort	tio2 and carbon nanotubes composites modify capacitive deionization anodes to improve the dechlorination efficiency in desulfurization wastewater
publisher	IWA Publishing
publishDate	2021
url	https://doaj.org/article/04836e304b5745838364bf155c995bf0
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Tio2 and carbon nanotubes composites modify capacitive deionization anodes to improve the dechlorination efficiency in desulfurization wastewater

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