Comparative study of modified expanded perlite with hexadecyltrimethylammonium-bromide and gallic acid for boron adsorption

Pelin Demirçivi; Gülhayat Nasün Saygılı

doi:10.1016/j.molliq.2018.01.116

Comparative study of modified expanded perlite with hexadecyltrimethylammonium-bromide and gallic acid for boron adsorption

Pelin Demirçivi^*, Gülhayat Nasün Saygılı

^*Corresponding author for this work

Department of Chemical Engineering

Yalova University

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

19 Citations (Scopus)

Abstract

Expanded perlite-based novel adsorbents for boron adsorption were evaluated by the modification with hexadecyltrimethylammonium bromide (HDTMA) and gallic acid (GA). The samples were characterized by XRD, SEM and FTIR analysis. The adsorption of boron was examined at different HDTMA/GA concentrations, solution pH, initial concentration, temperature and contact time. Inert electrolyte effect on boron adsorption was also investigated. The optimum pH was found between pH 7–9. At the optimum pH level, boron adsorption capacities of HDTMA-perlite and GA-perlite were calculated as 833 mg/g and 2500 mg/g, respectively. The adsorption kinetic data was best described by pseudo second-order kinetic model for both HDTMA-perlite and GA-perlite samples. The adsorption process was found to be endothermic, and positive entropy values the increase of randomness at solid/liquid interface.

Original language	English
Pages (from-to)	383-390
Number of pages	8
Journal	Journal of Molecular Liquids
Volume	254
DOIs	https://doi.org/10.1016/j.molliq.2018.01.116
Publication status	Published - 15 Mar 2018

Bibliographical note

Publisher Copyright:
© 2018 Elsevier B.V.

Keywords

Batch adsorption
Boron
Gallic acid
HDTMA
Perlite

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10.1016/j.molliq.2018.01.116

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title = "Comparative study of modified expanded perlite with hexadecyltrimethylammonium-bromide and gallic acid for boron adsorption",

abstract = "Expanded perlite-based novel adsorbents for boron adsorption were evaluated by the modification with hexadecyltrimethylammonium bromide (HDTMA) and gallic acid (GA). The samples were characterized by XRD, SEM and FTIR analysis. The adsorption of boron was examined at different HDTMA/GA concentrations, solution pH, initial concentration, temperature and contact time. Inert electrolyte effect on boron adsorption was also investigated. The optimum pH was found between pH 7–9. At the optimum pH level, boron adsorption capacities of HDTMA-perlite and GA-perlite were calculated as 833 mg/g and 2500 mg/g, respectively. The adsorption kinetic data was best described by pseudo second-order kinetic model for both HDTMA-perlite and GA-perlite samples. The adsorption process was found to be endothermic, and positive entropy values the increase of randomness at solid/liquid interface.",

keywords = "Batch adsorption, Boron, Gallic acid, HDTMA, Perlite",

author = "Pelin Demir{\c c}ivi and Saygılı, {G{\"u}lhayat Nas{\"u}n}",

note = "Publisher Copyright: {\textcopyright} 2018 Elsevier B.V.",

year = "2018",

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day = "15",

doi = "10.1016/j.molliq.2018.01.116",

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AU - Demirçivi, Pelin

AU - Saygılı, Gülhayat Nasün

PY - 2018/3/15

Y1 - 2018/3/15

N2 - Expanded perlite-based novel adsorbents for boron adsorption were evaluated by the modification with hexadecyltrimethylammonium bromide (HDTMA) and gallic acid (GA). The samples were characterized by XRD, SEM and FTIR analysis. The adsorption of boron was examined at different HDTMA/GA concentrations, solution pH, initial concentration, temperature and contact time. Inert electrolyte effect on boron adsorption was also investigated. The optimum pH was found between pH 7–9. At the optimum pH level, boron adsorption capacities of HDTMA-perlite and GA-perlite were calculated as 833 mg/g and 2500 mg/g, respectively. The adsorption kinetic data was best described by pseudo second-order kinetic model for both HDTMA-perlite and GA-perlite samples. The adsorption process was found to be endothermic, and positive entropy values the increase of randomness at solid/liquid interface.

AB - Expanded perlite-based novel adsorbents for boron adsorption were evaluated by the modification with hexadecyltrimethylammonium bromide (HDTMA) and gallic acid (GA). The samples were characterized by XRD, SEM and FTIR analysis. The adsorption of boron was examined at different HDTMA/GA concentrations, solution pH, initial concentration, temperature and contact time. Inert electrolyte effect on boron adsorption was also investigated. The optimum pH was found between pH 7–9. At the optimum pH level, boron adsorption capacities of HDTMA-perlite and GA-perlite were calculated as 833 mg/g and 2500 mg/g, respectively. The adsorption kinetic data was best described by pseudo second-order kinetic model for both HDTMA-perlite and GA-perlite samples. The adsorption process was found to be endothermic, and positive entropy values the increase of randomness at solid/liquid interface.

KW - Batch adsorption

KW - Boron

KW - Gallic acid

KW - HDTMA

KW - Perlite

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DO - 10.1016/j.molliq.2018.01.116

M3 - Article

AN - SCOPUS:85041512194

SN - 0167-7322

VL - 254

SP - 383

EP - 390

JO - Journal of Molecular Liquids

JF - Journal of Molecular Liquids

ER -

Comparative study of modified expanded perlite with hexadecyltrimethylammonium-bromide and gallic acid for boron adsorption

Abstract

Bibliographical note

Keywords

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