Efficient Removal of Pb(II) from Aqueous Medium Using Chemically Modified Silica Monolith

The adsorptive removal of lead (II) from aqueous medium was carried out by chemically modified silica monolith particles. Porous silica monolith particles were prepared by the sol-gel method and their surface modification was carried out using trimethoxy silyl propyl urea (TSPU) to prepare inorganic...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Ashraf Ali, Sarah Alharthi, Bashir Ahmad, Alia Naz, Idrees Khan, Fazal Mabood
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	heavy metals adsorption lead adsorption capacity silica monolith particles Organic chemistry QD241-441
Acceso en línea:	https://doaj.org/article/9ad9d6c857354b7bb6477eddd1864f9f
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:9ad9d6c857354b7bb6477eddd1864f9f
record_format	dspace
spelling	oai:doaj.org-article:9ad9d6c857354b7bb6477eddd1864f9f2021-11-25T18:28:06ZEfficient Removal of Pb(II) from Aqueous Medium Using Chemically Modified Silica Monolith10.3390/molecules262268851420-3049https://doaj.org/article/9ad9d6c857354b7bb6477eddd1864f9f2021-11-01T00:00:00Zhttps://www.mdpi.com/1420-3049/26/22/6885https://doaj.org/toc/1420-3049The adsorptive removal of lead (II) from aqueous medium was carried out by chemically modified silica monolith particles. Porous silica monolith particles were prepared by the sol-gel method and their surface modification was carried out using trimethoxy silyl propyl urea (TSPU) to prepare inorganic–organic hybrid adsorbent. The resultant adsorbent was evaluated for the removal of lead (Pb) from aqueous medium. The effect of pH, adsorbent dose, metal ion concentration and adsorption time was determined. It was found that the optimum conditions for adsorption of lead (Pb) were pH 5, adsorbent dose of 0.4 g/L, Pb(II) ions concentration of 500 mg/L and adsorption time of 1 h. The adsorbent chemically modified SM was characterized by scanning electron microscopy (SEM), BET/BJH and thermo gravimetric analysis (TGA). The percent adsorption of Pb(II) onto chemically modified silica monolith particles was 98%. An isotherm study showed that the adsorption data of Pb(II) onto chemically modified SM was fully fitted with the Freundlich and Langmuir isotherm models. It was found from kinetic study that the adsorption of Pb(II) followed a pseudo second-order model. Moreover, thermodynamic study suggests that the adsorption of Pb(II) is spontaneous and exothermic. The adsorption capacity of chemically modified SM for Pb(II) ions was 792 mg/g which is quite high as compared to the traditional adsorbents. The adsorbent chemically modified SM was regenerated, used again three times for the adsorption of Pb(II) ions and it was found that the adsorption capacity of the regenerated adsorbent was only dropped by 7%. Due to high adsorption capacity chemically modified silica monolith particles could be used as an effective adsorbent for the removal of heavy metals from wastewater.Ashraf AliSarah AlharthiBashir AhmadAlia NazIdrees KhanFazal MaboodMDPI AGarticleheavy metalsadsorptionleadadsorption capacitysilica monolith particlesOrganic chemistryQD241-441ENMolecules, Vol 26, Iss 6885, p 6885 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	heavy metals adsorption lead adsorption capacity silica monolith particles Organic chemistry QD241-441
spellingShingle	heavy metals adsorption lead adsorption capacity silica monolith particles Organic chemistry QD241-441 Ashraf Ali Sarah Alharthi Bashir Ahmad Alia Naz Idrees Khan Fazal Mabood Efficient Removal of Pb(II) from Aqueous Medium Using Chemically Modified Silica Monolith
description	The adsorptive removal of lead (II) from aqueous medium was carried out by chemically modified silica monolith particles. Porous silica monolith particles were prepared by the sol-gel method and their surface modification was carried out using trimethoxy silyl propyl urea (TSPU) to prepare inorganic–organic hybrid adsorbent. The resultant adsorbent was evaluated for the removal of lead (Pb) from aqueous medium. The effect of pH, adsorbent dose, metal ion concentration and adsorption time was determined. It was found that the optimum conditions for adsorption of lead (Pb) were pH 5, adsorbent dose of 0.4 g/L, Pb(II) ions concentration of 500 mg/L and adsorption time of 1 h. The adsorbent chemically modified SM was characterized by scanning electron microscopy (SEM), BET/BJH and thermo gravimetric analysis (TGA). The percent adsorption of Pb(II) onto chemically modified silica monolith particles was 98%. An isotherm study showed that the adsorption data of Pb(II) onto chemically modified SM was fully fitted with the Freundlich and Langmuir isotherm models. It was found from kinetic study that the adsorption of Pb(II) followed a pseudo second-order model. Moreover, thermodynamic study suggests that the adsorption of Pb(II) is spontaneous and exothermic. The adsorption capacity of chemically modified SM for Pb(II) ions was 792 mg/g which is quite high as compared to the traditional adsorbents. The adsorbent chemically modified SM was regenerated, used again three times for the adsorption of Pb(II) ions and it was found that the adsorption capacity of the regenerated adsorbent was only dropped by 7%. Due to high adsorption capacity chemically modified silica monolith particles could be used as an effective adsorbent for the removal of heavy metals from wastewater.
format	article
author	Ashraf Ali Sarah Alharthi Bashir Ahmad Alia Naz Idrees Khan Fazal Mabood
author_facet	Ashraf Ali Sarah Alharthi Bashir Ahmad Alia Naz Idrees Khan Fazal Mabood
author_sort	Ashraf Ali
title	Efficient Removal of Pb(II) from Aqueous Medium Using Chemically Modified Silica Monolith
title_short	Efficient Removal of Pb(II) from Aqueous Medium Using Chemically Modified Silica Monolith
title_full	Efficient Removal of Pb(II) from Aqueous Medium Using Chemically Modified Silica Monolith
title_fullStr	Efficient Removal of Pb(II) from Aqueous Medium Using Chemically Modified Silica Monolith
title_full_unstemmed	Efficient Removal of Pb(II) from Aqueous Medium Using Chemically Modified Silica Monolith
title_sort	efficient removal of pb(ii) from aqueous medium using chemically modified silica monolith
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/9ad9d6c857354b7bb6477eddd1864f9f
work_keys_str_mv	AT ashrafali efficientremovalofpbiifromaqueousmediumusingchemicallymodifiedsilicamonolith AT sarahalharthi efficientremovalofpbiifromaqueousmediumusingchemicallymodifiedsilicamonolith AT bashirahmad efficientremovalofpbiifromaqueousmediumusingchemicallymodifiedsilicamonolith AT alianaz efficientremovalofpbiifromaqueousmediumusingchemicallymodifiedsilicamonolith AT idreeskhan efficientremovalofpbiifromaqueousmediumusingchemicallymodifiedsilicamonolith AT fazalmabood efficientremovalofpbiifromaqueousmediumusingchemicallymodifiedsilicamonolith
_version_	1718411147765350400

Efficient Removal of Pb(II) from Aqueous Medium Using Chemically Modified Silica Monolith

Ejemplares similares