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Main Title: Effect of dispersed hydrophilic silicon dioxide nanoparticles on batch adsorption of benzoic acid from aqueous solution using modified natural vermiculite: An equilibrium study
Author(s): Pouya, Ehsan Sadeghi
Abolghasemi, Hossein
Fatoorehchi, Hooman
Rasem, Bettina
Hashemi, Seyed Jalaledin
Type: Article
Language Code: en
Abstract: The equilibrium adsorption of benzoic acid from an aqueous medium on a natural vermiculite-based adsorbent was studied in the presence and absence of hydrophilic silicon dioxide nanoparticles in batchwise mode. The adsorbent was prepared through grinding natural vermiculite in a laboratory vibratory disk mill and the surfactant modification of ground vermiculite by cetyltrimethylammonium bromide, subsequently. The equilibrium isotherm in the presence and absence of nanoparticles was experimentally obtained and the equilibrium data were fitted to the Langmuir, Freundlich, Dubinin–Radushkevich and Temkin models. The results indicated that the dispersion of silicon dioxide nanoparticles at optimum concentration in the liquid phase remarkably increases the removal efficiency. Furthermore, it yields a more favorable equilibrium isotherm and changes the compatibility of equilibrium data from the Langmuir and Temkin equations to just the Langmuir equation. A quadratic polynomial model predicting the equilibrium adsorbent capacity in the presence of nanoparticles as a function of the adsorbate and initial nanoparticle concentrations was successfully developed using the response surface methodology based on the rotatable central composite design. A desirability function was used in order to optimize the values of all variables, independent and dependent ones, simultaneously.
Issue Date: 11-Oct-2016
Date Available: 27-Jul-2018
DDC Class: 600 Technik, Technologie
Subject(s): adsorption
benzoic acid
cetyltrimetylammonium bromide
silicon dioxide nanoparticles
response surface methodology
desirability function
Journal Title: Journal of Applied Research and Technology
Publisher: UNAM
Publisher Place: Mexico
Volume: 14
Issue: 5
Publisher DOI: 10.1016/j.jart.2016.08.005
Page Start: 325
Page End: 337
ISSN: 1665-6423
Appears in Collections:FG Verfahrenstechnik » Publications

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