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Study of Hg(II) removal from aqueous solution using lignocellulosic coconut fiber biosorbents: equilibrium and kinetic evaluation

Johari, Khairiraihanna and Saman, Norasikin and Song, Shiow Tien and Mat, Hanapi and Jerry, Heng (2014) Study of Hg(II) removal from aqueous solution using lignocellulosic coconut fiber biosorbents: equilibrium and kinetic evaluation. Chemical Engineering Communications, 201 (9). pp. 1198-1220. ISSN 1563-5201

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Official URL: https://dx.doi.org/10.1080/00986445.2013.806311

Abstract

Lignocellulosic coconut wastes such as pith and fiber, which are abundantly available and cheap, have the potential of being used as low-cost biosorbents for heavy metal ion removal. In this study, pristine (CF-Pristine) and NaOH-treated (CF-NaOH) coconut fibers were used as a biosorbent for Hg(II) removal from an aqueous solution. The coconut fiber biosorbent (CFB) was characterized by scanning electron microscopy (SEM) and Fourier transform-infrared (FTIR) spectroscopy. The Hg(II) sorption capacities obtained for CF-Pristine and CF-NaOH were 144.4 and 135.0mg/g, respectively. Both the equilibrium and kinetic data of Hg(II) sorption onto CFB followed the Langmuir isotherm model and a pseudo-second-order kinetic model, respectively. A further analysis of the kinetic data suggested that the Hg(II) sorption process was governed by both intraparticle and external mass transfer processes, in which film diffusion was the rate-limiting step. These results demonstrated that both pristine- and alkali-treated coconut wastes could be potential low-cost biosorbent alternatives for the removal of Hg(II) from aqueous solutions, such as water containing Hg(II) produced in the oil and gas industry.

Item Type:Article
Uncontrolled Keywords:modification, sorption
Subjects:T Technology > TP Chemical technology
Divisions:Chemical Engineering
ID Code:62710
Deposited By: Fazli Masari
Deposited On:05 Jun 2017 02:23
Last Modified:05 Jun 2017 02:23

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