Efficient removal of acetic acid by a regenerable resin-based spherical activated carbon

Carboxylic acids are the main pollutant of industrial wastewater during the advanced oxidation process (AOPs). In this study, a resin-based spherical activated carbon (RSAC, AF5) as an adsorbent was examined and acetic acid was used as a model substrate for adsorption investigation. The pH = 3, temp...

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Autores principales:	Huiling Wu, Wenjing Sun, Huangzhao Wei, Ying Zhao, Chengyu Jin, Xu Yang, Xin Rong, Chenglin Sun
Formato:	article
Lenguaje:	EN
Publicado:	IWA Publishing 2021
Materias:	acetic acid adsorption model fitting resin-based spherical activated carbon water treatment Environmental technology. Sanitary engineering TD1-1066
Acceso en línea:	https://doaj.org/article/da568819749e4c10ad7ebdc7094d04dd
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spelling	oai:doaj.org-article:da568819749e4c10ad7ebdc7094d04dd2021-11-06T11:16:40ZEfficient removal of acetic acid by a regenerable resin-based spherical activated carbon0273-12231996-973210.2166/wst.2021.247https://doaj.org/article/da568819749e4c10ad7ebdc7094d04dd2021-08-01T00:00:00Zhttp://wst.iwaponline.com/content/84/3/697https://doaj.org/toc/0273-1223https://doaj.org/toc/1996-9732Carboxylic acids are the main pollutant of industrial wastewater during the advanced oxidation process (AOPs). In this study, a resin-based spherical activated carbon (RSAC, AF5) as an adsorbent was examined and acetic acid was used as a model substrate for adsorption investigation. The pH = 3, temperature = 298 K were fixed by batch technique. The pseudo-second-order kinetic model, the intraparticle and external models are fitted well, and it was found that the adsorption of acetic acid onto AF5 was controlled by liquid film diffusion. A Freundlich model indicated that the adsorption process was heterogeneous multimolecular layer adsorption on the surface. AF5 shows good regenerative ability; the recovery rate of adsorption capacity was ∼88% after five cycles. Chemical oxygen demand (COD) adsorption removal rate could be maintained at 100% for over 35 h in an actual AOPs effluent, and could be eluted for 100% after 8 h by 0.8wt% NaOH. Characterizations, including XRF, XRD, TG/DSC,FTIR, SEM and N2 adsorption, showed that the excellent adsorption performance was mainly due to the microporous structure and large specific surface area (1,512.88 m2/g), the adsorption mechanism mainly included pore filling effect and electrostatic attraction. After five adsorption recycles, AF5's pore characteristic did not change significantly. This study provides a scientific basis for the wastewater standard discharge process of AOPs coupled adsorption. HIGHLIGHTS The reusability of the acetic acid wastewater was increased by adsorption methods.; Resin-spherical activated carbon was used as an adsorbent in acetic acid diluent.; Freundlich isotherm and pseudo-second-order adsorption kinetics were the most suitable models.; The effluent of CWAO/adsorption process effluent could reach the discharge standard.;Huiling WuWenjing SunHuangzhao WeiYing ZhaoChengyu JinXu YangXin RongChenglin SunIWA Publishingarticleacetic acidadsorptionmodel fittingresin-based spherical activated carbonwater treatmentEnvironmental technology. Sanitary engineeringTD1-1066ENWater Science and Technology, Vol 84, Iss 3, Pp 697-711 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	acetic acid adsorption model fitting resin-based spherical activated carbon water treatment Environmental technology. Sanitary engineering TD1-1066
spellingShingle	acetic acid adsorption model fitting resin-based spherical activated carbon water treatment Environmental technology. Sanitary engineering TD1-1066 Huiling Wu Wenjing Sun Huangzhao Wei Ying Zhao Chengyu Jin Xu Yang Xin Rong Chenglin Sun Efficient removal of acetic acid by a regenerable resin-based spherical activated carbon
description	Carboxylic acids are the main pollutant of industrial wastewater during the advanced oxidation process (AOPs). In this study, a resin-based spherical activated carbon (RSAC, AF5) as an adsorbent was examined and acetic acid was used as a model substrate for adsorption investigation. The pH = 3, temperature = 298 K were fixed by batch technique. The pseudo-second-order kinetic model, the intraparticle and external models are fitted well, and it was found that the adsorption of acetic acid onto AF5 was controlled by liquid film diffusion. A Freundlich model indicated that the adsorption process was heterogeneous multimolecular layer adsorption on the surface. AF5 shows good regenerative ability; the recovery rate of adsorption capacity was ∼88% after five cycles. Chemical oxygen demand (COD) adsorption removal rate could be maintained at 100% for over 35 h in an actual AOPs effluent, and could be eluted for 100% after 8 h by 0.8wt% NaOH. Characterizations, including XRF, XRD, TG/DSC,FTIR, SEM and N2 adsorption, showed that the excellent adsorption performance was mainly due to the microporous structure and large specific surface area (1,512.88 m2/g), the adsorption mechanism mainly included pore filling effect and electrostatic attraction. After five adsorption recycles, AF5's pore characteristic did not change significantly. This study provides a scientific basis for the wastewater standard discharge process of AOPs coupled adsorption. HIGHLIGHTS The reusability of the acetic acid wastewater was increased by adsorption methods.; Resin-spherical activated carbon was used as an adsorbent in acetic acid diluent.; Freundlich isotherm and pseudo-second-order adsorption kinetics were the most suitable models.; The effluent of CWAO/adsorption process effluent could reach the discharge standard.;
format	article
author	Huiling Wu Wenjing Sun Huangzhao Wei Ying Zhao Chengyu Jin Xu Yang Xin Rong Chenglin Sun
author_facet	Huiling Wu Wenjing Sun Huangzhao Wei Ying Zhao Chengyu Jin Xu Yang Xin Rong Chenglin Sun
author_sort	Huiling Wu
title	Efficient removal of acetic acid by a regenerable resin-based spherical activated carbon
title_short	Efficient removal of acetic acid by a regenerable resin-based spherical activated carbon
title_full	Efficient removal of acetic acid by a regenerable resin-based spherical activated carbon
title_fullStr	Efficient removal of acetic acid by a regenerable resin-based spherical activated carbon
title_full_unstemmed	Efficient removal of acetic acid by a regenerable resin-based spherical activated carbon
title_sort	efficient removal of acetic acid by a regenerable resin-based spherical activated carbon
publisher	IWA Publishing
publishDate	2021
url	https://doaj.org/article/da568819749e4c10ad7ebdc7094d04dd
work_keys_str_mv	AT huilingwu efficientremovalofaceticacidbyaregenerableresinbasedsphericalactivatedcarbon AT wenjingsun efficientremovalofaceticacidbyaregenerableresinbasedsphericalactivatedcarbon AT huangzhaowei efficientremovalofaceticacidbyaregenerableresinbasedsphericalactivatedcarbon AT yingzhao efficientremovalofaceticacidbyaregenerableresinbasedsphericalactivatedcarbon AT chengyujin efficientremovalofaceticacidbyaregenerableresinbasedsphericalactivatedcarbon AT xuyang efficientremovalofaceticacidbyaregenerableresinbasedsphericalactivatedcarbon AT xinrong efficientremovalofaceticacidbyaregenerableresinbasedsphericalactivatedcarbon AT chenglinsun efficientremovalofaceticacidbyaregenerableresinbasedsphericalactivatedcarbon
_version_	1718443763170279424

Efficient removal of acetic acid by a regenerable resin-based spherical activated carbon

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