Effective adsorption of Direct Red 23 by sludge biochar-based adsorbent: adsorption kinetics, thermodynamics and mechanisms study

Using solid adsorbents, such as biochar, has been a potential practice to remove the pollutants from water bodies to render the water safer for potential usage. A potential application of sludge biochar-based adsorbent (SBA), obtained by pyrolysis with hydrothermal treatment, was developed to adsorb...

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Autores principales:	Ruqing Jiang, Guangwei Yu, Pamphile Ndagijimana, Yu Wang, Futian You, Zhenjiao Xing, Yin Wang
Formato:	article
Lenguaje:	EN
Publicado:	IWA Publishing 2021
Materias:	adsorption kinetics direct red 23 mechanism sludge biochar-based adsorbent thermodynamic Environmental technology. Sanitary engineering TD1-1066
Acceso en línea:	https://doaj.org/article/b7ff61024d054036af6d0e6edd6c10a1
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spelling	oai:doaj.org-article:b7ff61024d054036af6d0e6edd6c10a12021-11-06T11:05:28ZEffective adsorption of Direct Red 23 by sludge biochar-based adsorbent: adsorption kinetics, thermodynamics and mechanisms study0273-12231996-973210.2166/wst.2021.126https://doaj.org/article/b7ff61024d054036af6d0e6edd6c10a12021-05-01T00:00:00Zhttp://wst.iwaponline.com/content/83/10/2424https://doaj.org/toc/0273-1223https://doaj.org/toc/1996-9732Using solid adsorbents, such as biochar, has been a potential practice to remove the pollutants from water bodies to render the water safer for potential usage. A potential application of sludge biochar-based adsorbent (SBA), obtained by pyrolysis with hydrothermal treatment, was developed to adsorb Direct Red 23 (DR23) from wastewater. The results showed that for the synthesized SBA (0.5 g/L) in the adsorption of DR23 at low concentration (<20 mg/L), the DR23 was totally removed from the aqueous solution. pH had a limited effect on the adsorption, while an increase in temperature was shown to have a large enhancing effect. The adsorption kinetics were best fitted by the pseudo-second-order kinetic model, while the equilibrium data were best fitted by the Langmuir isotherm. A maximum saturation adsorption capacity of SBA of 111.98 mg/g was achieved. SBA could then be regenerated by pyrolysis, and after three cycles, SBA still retained good adsorption ability for DR23, a removal rate exceeding 97% was achieved. Functional groups, pores, π-π bond, and electrostatic interactions are the key to the adsorption mechanisms. The results proved that SBA would be a promising material in the application of removing dyes in printing and dyeing wastewater. HIGHLIGHTS An adsorbent was synthesized from sludge by pyrolysis with hydrothermal treatment.; The adsorbent presented high removal efficiency for DR23 with 111.98 mg/g.; Physicochemical interactions are key factors for the adsorption mechanism.; The new adsorbent could be regenerated to obtain awesome adsorption performance.;Ruqing JiangGuangwei YuPamphile NdagijimanaYu WangFutian YouZhenjiao XingYin WangIWA Publishingarticleadsorption kineticsdirect red 23mechanismsludge biochar-based adsorbentthermodynamicEnvironmental technology. Sanitary engineeringTD1-1066ENWater Science and Technology, Vol 83, Iss 10, Pp 2424-2436 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	adsorption kinetics direct red 23 mechanism sludge biochar-based adsorbent thermodynamic Environmental technology. Sanitary engineering TD1-1066
spellingShingle	adsorption kinetics direct red 23 mechanism sludge biochar-based adsorbent thermodynamic Environmental technology. Sanitary engineering TD1-1066 Ruqing Jiang Guangwei Yu Pamphile Ndagijimana Yu Wang Futian You Zhenjiao Xing Yin Wang Effective adsorption of Direct Red 23 by sludge biochar-based adsorbent: adsorption kinetics, thermodynamics and mechanisms study
description	Using solid adsorbents, such as biochar, has been a potential practice to remove the pollutants from water bodies to render the water safer for potential usage. A potential application of sludge biochar-based adsorbent (SBA), obtained by pyrolysis with hydrothermal treatment, was developed to adsorb Direct Red 23 (DR23) from wastewater. The results showed that for the synthesized SBA (0.5 g/L) in the adsorption of DR23 at low concentration (<20 mg/L), the DR23 was totally removed from the aqueous solution. pH had a limited effect on the adsorption, while an increase in temperature was shown to have a large enhancing effect. The adsorption kinetics were best fitted by the pseudo-second-order kinetic model, while the equilibrium data were best fitted by the Langmuir isotherm. A maximum saturation adsorption capacity of SBA of 111.98 mg/g was achieved. SBA could then be regenerated by pyrolysis, and after three cycles, SBA still retained good adsorption ability for DR23, a removal rate exceeding 97% was achieved. Functional groups, pores, π-π bond, and electrostatic interactions are the key to the adsorption mechanisms. The results proved that SBA would be a promising material in the application of removing dyes in printing and dyeing wastewater. HIGHLIGHTS An adsorbent was synthesized from sludge by pyrolysis with hydrothermal treatment.; The adsorbent presented high removal efficiency for DR23 with 111.98 mg/g.; Physicochemical interactions are key factors for the adsorption mechanism.; The new adsorbent could be regenerated to obtain awesome adsorption performance.;
format	article
author	Ruqing Jiang Guangwei Yu Pamphile Ndagijimana Yu Wang Futian You Zhenjiao Xing Yin Wang
author_facet	Ruqing Jiang Guangwei Yu Pamphile Ndagijimana Yu Wang Futian You Zhenjiao Xing Yin Wang
author_sort	Ruqing Jiang
title	Effective adsorption of Direct Red 23 by sludge biochar-based adsorbent: adsorption kinetics, thermodynamics and mechanisms study
title_short	Effective adsorption of Direct Red 23 by sludge biochar-based adsorbent: adsorption kinetics, thermodynamics and mechanisms study
title_full	Effective adsorption of Direct Red 23 by sludge biochar-based adsorbent: adsorption kinetics, thermodynamics and mechanisms study
title_fullStr	Effective adsorption of Direct Red 23 by sludge biochar-based adsorbent: adsorption kinetics, thermodynamics and mechanisms study
title_full_unstemmed	Effective adsorption of Direct Red 23 by sludge biochar-based adsorbent: adsorption kinetics, thermodynamics and mechanisms study
title_sort	effective adsorption of direct red 23 by sludge biochar-based adsorbent: adsorption kinetics, thermodynamics and mechanisms study
publisher	IWA Publishing
publishDate	2021
url	https://doaj.org/article/b7ff61024d054036af6d0e6edd6c10a1
work_keys_str_mv	AT ruqingjiang effectiveadsorptionofdirectred23bysludgebiocharbasedadsorbentadsorptionkineticsthermodynamicsandmechanismsstudy AT guangweiyu effectiveadsorptionofdirectred23bysludgebiocharbasedadsorbentadsorptionkineticsthermodynamicsandmechanismsstudy AT pamphilendagijimana effectiveadsorptionofdirectred23bysludgebiocharbasedadsorbentadsorptionkineticsthermodynamicsandmechanismsstudy AT yuwang effectiveadsorptionofdirectred23bysludgebiocharbasedadsorbentadsorptionkineticsthermodynamicsandmechanismsstudy AT futianyou effectiveadsorptionofdirectred23bysludgebiocharbasedadsorbentadsorptionkineticsthermodynamicsandmechanismsstudy AT zhenjiaoxing effectiveadsorptionofdirectred23bysludgebiocharbasedadsorbentadsorptionkineticsthermodynamicsandmechanismsstudy AT yinwang effectiveadsorptionofdirectred23bysludgebiocharbasedadsorbentadsorptionkineticsthermodynamicsandmechanismsstudy
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Effective adsorption of Direct Red 23 by sludge biochar-based adsorbent: adsorption kinetics, thermodynamics and mechanisms study

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