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Removal of fluoride using quaternized palm kernel shell as adsorbents: equilibrium isotherms and kinetics studies


Citation

Abu Bakar, Ayu Haslija and Koay, Yin Shin and Ching, Yern Chee and Abdullah, Luqman Chuah and Choong, Thomas Shean Yaw and Alkhatib, Ma'an and Mobarekeh, Mohsen Nourouzi and Mohd Zahri, Nur Amirah (2016) Removal of fluoride using quaternized palm kernel shell as adsorbents: equilibrium isotherms and kinetics studies. BioResources, 11 (2). pp. 4485-4511. ISSN 1930-2126

Abstract / Synopsis

Palm kernel shell (PKS) core fibers, an agricultural waste, were chemically modified using N-(3-chloro-2-hydroxypropyl) trimethylammonium chloride (CHMAC) as a quaternizing agent. The potential of quaternized palm kernel shell (QPKS) as an adsorbent for fluoride in an aqueous solution was then studied. The quaternized palm kernel shell (QPKS) core fibers were characterized using Fourier transform infrared spectroscopy (FTIR) and a scanning electron microscope (SEM). The effect of various factors on the fluoride sequestration was also investigated. The results showed that with an increase in the adsorbent amount and contact time, the efficiency of fluoride removal was improved. The maximum fluoride uptake was obtained at pH 3 and a contact time of 4 h. The adsorption behavior was further investigated using equilibrium isotherms and kinetics studies. The results from these studies fit well into Freundlich, Redlich-Peterson, and Sips isotherm’s with a coefficient of determination (R2) of 0.9716. The maximum fluoride removal was 63%. For kinetics studies, the pseudo-second order was the best fit for fluoride, with an R2 of 0.999. These results suggest that QPKS has the potential to serve as a low-cost adsorbent for fluoride removal from aqueous solutions.


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Additional Metadata

Item Type: Article
Divisions: Faculty of Engineering
Institute of Tropical Forestry and Forest Products
Publisher: North Carolina State University
Keywords: Fluoride removal; Quartenized palm kernel shells; Adsorption; Isotherms; Kinetics
Depositing User: Nurul Ainie Mokhtar
Date Deposited: 16 Jan 2018 18:28
Last Modified: 17 Jan 2018 10:11
URI: http://psasir.upm.edu.my/id/eprint/53772
Statistic Details: View Download Statistic

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