Enhanced adsorptive performance of Cr(VI) onto layered double hydroxide-bentonite composite: Isotherm, kinetic and thermodynamic studies

Nabeel Jarrah; Nuhu Dalhat Mu'azu; Mukarram Zubair; Mamdouh Al-Harthi

doi:10.1080/01496395.2019.1614955

Enhanced adsorptive performance of Cr(VI) onto layered double hydroxide-bentonite composite: Isotherm, kinetic and thermodynamic studies

Nabeel Jarrah^*, Nuhu Dalhat Mu'azu, Mukarram Zubair, Mamdouh Al-Harthi

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

29 Scopus citations

Abstract

In this work, cobalt-aluminum-layered double hydroxide (CoAl) and its bentonite composite (Bent-CoAl) were utilized for adsorption of Cr(VI) from water. Incorporation of bentonite into layers of CoAl resulted in significant improvement in the adsorptive performance with increased BET surface area, without damaging LDH structure. The adsorption process was described by Freundlich isotherm and pseudo-second-order kinetic models. The mechanism of Cr(VI) sorption mainly involved electrostatic and chemical interactions with maximum Cr(VI) sorption value of 211.86 mg/g. This suggests that synergistic effect of bentonite into CoAl provided a superior adsorbent for decontamination of heavy metals.

Original language	English
Pages (from-to)	1897-1909
Number of pages	13
Journal	Separation Science and Technology
Volume	55
Issue number	11
DOIs	https://doi.org/10.1080/01496395.2019.1614955
State	Published - 23 Jul 2020

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Publisher Copyright:
© 2019, © 2019 Taylor & Francis Group, LLC.

Keywords

Bentonite incorporated layered double hydroxide
Chromium(VI) removal
adsorption thermodynamic
isotherms and kinetics studies

ASJC Scopus subject areas

General Chemistry
General Chemical Engineering
Process Chemistry and Technology
Filtration and Separation

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10.1080/01496395.2019.1614955

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abstract = "In this work, cobalt-aluminum-layered double hydroxide (CoAl) and its bentonite composite (Bent-CoAl) were utilized for adsorption of Cr(VI) from water. Incorporation of bentonite into layers of CoAl resulted in significant improvement in the adsorptive performance with increased BET surface area, without damaging LDH structure. The adsorption process was described by Freundlich isotherm and pseudo-second-order kinetic models. The mechanism of Cr(VI) sorption mainly involved electrostatic and chemical interactions with maximum Cr(VI) sorption value of 211.86 mg/g. This suggests that synergistic effect of bentonite into CoAl provided a superior adsorbent for decontamination of heavy metals.",

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AU - Zubair, Mukarram

AU - Al-Harthi, Mamdouh

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AB - In this work, cobalt-aluminum-layered double hydroxide (CoAl) and its bentonite composite (Bent-CoAl) were utilized for adsorption of Cr(VI) from water. Incorporation of bentonite into layers of CoAl resulted in significant improvement in the adsorptive performance with increased BET surface area, without damaging LDH structure. The adsorption process was described by Freundlich isotherm and pseudo-second-order kinetic models. The mechanism of Cr(VI) sorption mainly involved electrostatic and chemical interactions with maximum Cr(VI) sorption value of 211.86 mg/g. This suggests that synergistic effect of bentonite into CoAl provided a superior adsorbent for decontamination of heavy metals.

KW - Bentonite incorporated layered double hydroxide

KW - Chromium(VI) removal

KW - adsorption thermodynamic

KW - isotherms and kinetics studies

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Enhanced adsorptive performance of Cr(VI) onto layered double hydroxide-bentonite composite: Isotherm, kinetic and thermodynamic studies

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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