Kinetics, isotherm and thermodynamic studies of S2− adsorption by (SBA-15)-Hg (II)

The nano-mesoporous material SBA (Santa Barbara Amorphous)-15 was synthesized using the hydrothermal method. Hg2+ was adsorbed by SBA-15 and then the S2− in the aqueous phase by (SBA-15)-Hg(II), with the hope that materials with better S2− adsorption properties can be obtained. The relevant material...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Xiao-Dong Li, Qing-Zhou Zhai
Formato:	article
Lenguaje:	EN
Publicado:	IWA Publishing 2021
Materias:	adsorption hg2+ mesoporous material sba-15 s2− Environmental technology. Sanitary engineering TD1-1066
Acceso en línea:	https://doaj.org/article/6994ba1b6a214a6fae0aaad30f5c5b47
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:6994ba1b6a214a6fae0aaad30f5c5b47
record_format	dspace
spelling	oai:doaj.org-article:6994ba1b6a214a6fae0aaad30f5c5b472021-11-05T21:17:33ZKinetics, isotherm and thermodynamic studies of S2− adsorption by (SBA-15)-Hg (II)1751-231X10.2166/wpt.2021.081https://doaj.org/article/6994ba1b6a214a6fae0aaad30f5c5b472021-10-01T00:00:00Zhttp://wpt.iwaponline.com/content/16/4/1475https://doaj.org/toc/1751-231XThe nano-mesoporous material SBA (Santa Barbara Amorphous)-15 was synthesized using the hydrothermal method. Hg2+ was adsorbed by SBA-15 and then the S2− in the aqueous phase by (SBA-15)-Hg(II), with the hope that materials with better S2− adsorption properties can be obtained. The relevant materials were characterized by X-ray diffraction, scanning electron microscopy, 77 K nitrogen adsorption-desorption, and related product characteristics were determined. In this work, the adsorption conditions of S2− onto (SBA-15)-Hg(II) were optimized. Adsorption efficiency reached about 92% and the adsorption capacity 55.02 mg/g. Studies of the system's adsorption kinetics showed that the pseudo-second-order equation applies. The thermodynamic results indicated that ΔG0 < 0, ΔH0 = −28.56 kJ/mol, ΔS0 = −81.136 J/(mol·K), and that adsorption is exothermic, enthalpy decreases and the reaction is spontaneous. This accords with the Freundlich isothermal adsorption equation. HIGHLIGHTS Under the optimized adsorption conditions, the adsorption rate of S2− reached 92% and the adsorption capacity reached 55.02 mg/g.; The adsorption process of S2− by the (SBA-15)-Hg(II) is in accordance with the quasi-second-order kinetic equation in kinetic aspect, and the adsorption isotherm is in accordance with the Freundlich model.;Xiao-Dong LiQing-Zhou ZhaiIWA Publishingarticleadsorptionhg2+mesoporous materialsba-15s2−Environmental technology. Sanitary engineeringTD1-1066ENWater Practice and Technology, Vol 16, Iss 4, Pp 1475-1487 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	adsorption hg2+ mesoporous material sba-15 s2− Environmental technology. Sanitary engineering TD1-1066
spellingShingle	adsorption hg2+ mesoporous material sba-15 s2− Environmental technology. Sanitary engineering TD1-1066 Xiao-Dong Li Qing-Zhou Zhai Kinetics, isotherm and thermodynamic studies of S2− adsorption by (SBA-15)-Hg (II)
description	The nano-mesoporous material SBA (Santa Barbara Amorphous)-15 was synthesized using the hydrothermal method. Hg2+ was adsorbed by SBA-15 and then the S2− in the aqueous phase by (SBA-15)-Hg(II), with the hope that materials with better S2− adsorption properties can be obtained. The relevant materials were characterized by X-ray diffraction, scanning electron microscopy, 77 K nitrogen adsorption-desorption, and related product characteristics were determined. In this work, the adsorption conditions of S2− onto (SBA-15)-Hg(II) were optimized. Adsorption efficiency reached about 92% and the adsorption capacity 55.02 mg/g. Studies of the system's adsorption kinetics showed that the pseudo-second-order equation applies. The thermodynamic results indicated that ΔG0 < 0, ΔH0 = −28.56 kJ/mol, ΔS0 = −81.136 J/(mol·K), and that adsorption is exothermic, enthalpy decreases and the reaction is spontaneous. This accords with the Freundlich isothermal adsorption equation. HIGHLIGHTS Under the optimized adsorption conditions, the adsorption rate of S2− reached 92% and the adsorption capacity reached 55.02 mg/g.; The adsorption process of S2− by the (SBA-15)-Hg(II) is in accordance with the quasi-second-order kinetic equation in kinetic aspect, and the adsorption isotherm is in accordance with the Freundlich model.;
format	article
author	Xiao-Dong Li Qing-Zhou Zhai
author_facet	Xiao-Dong Li Qing-Zhou Zhai
author_sort	Xiao-Dong Li
title	Kinetics, isotherm and thermodynamic studies of S2− adsorption by (SBA-15)-Hg (II)
title_short	Kinetics, isotherm and thermodynamic studies of S2− adsorption by (SBA-15)-Hg (II)
title_full	Kinetics, isotherm and thermodynamic studies of S2− adsorption by (SBA-15)-Hg (II)
title_fullStr	Kinetics, isotherm and thermodynamic studies of S2− adsorption by (SBA-15)-Hg (II)
title_full_unstemmed	Kinetics, isotherm and thermodynamic studies of S2− adsorption by (SBA-15)-Hg (II)
title_sort	kinetics, isotherm and thermodynamic studies of s2− adsorption by (sba-15)-hg (ii)
publisher	IWA Publishing
publishDate	2021
url	https://doaj.org/article/6994ba1b6a214a6fae0aaad30f5c5b47
work_keys_str_mv	AT xiaodongli kineticsisothermandthermodynamicstudiesofs2adsorptionbysba15hgii AT qingzhouzhai kineticsisothermandthermodynamicstudiesofs2adsorptionbysba15hgii
_version_	1718443984972414976

Kinetics, isotherm and thermodynamic studies of S2− adsorption by (SBA-15)-Hg (II)

Ejemplares similares