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Removal of chromium (VI) from aqueous solution using treated oil palm fibre

M.H, Isa and N, Ibrahim and H.A, Aziz and Mohd.N, Adlan and N.H.Md, Sabiani and A.A.L, Zinatizadeh and S.R.M, Kutty (2008) Removal of chromium (VI) from aqueous solution using treated oil palm fibre. [Citation Index Journal]

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Abstract

This study proposed an oil palm by-product as a low-cost adsorbent for the removal of hexavalent chromium [Cr (VI)] from aqueous solution. Adsorption of Cr (VI) by sulphuric acid and heat-treated oil palm fibre was conducted using batch tests. The influence of pH, contact time, initial chromium concentration and adsorbent dosage on the removal of Cr (VI) from the solutions was investigated. The optimum initial pH for maximum uptake of Cr (VI) from aqueous solution was found to be 1.5. The removal efficiency was found to correlate with the initial Cr (VI) concentration, adsorbent dosage as well as the contact time between Cr (VI) and the adsorbent. The adsorption kinetics tested with pseudo first order and pseudo second order models yielded high R<sup>2</sup> values from 0.9254 to 0.9870 and from 0.9936 to 0.9998, respectively. The analysis of variance (ANOVA) showed significant difference between the R<sup>2</sup> values of the two models at 99% confidence level. The Freundlich isotherm (R<sup>2</sup> = 0.8778) described Cr (VI) adsorption slightly better than the Langmuir isotherm (R<sup>2</sup> = 0.8715). Difficulty in desorption of Cr (VI) suggests the suitability of treated oil palm fibre as a single-use adsorbent for Cr (VI) removal from aqueous solution. © 2007 Elsevier B.V. All rights reserved.

Item Type:Citation Index Journal
Uncontrolled Keywords:Adsorption; Byproducts; Chromium; Concentration (process); Heat treatment; Reaction kinetics; Langmuir isotherm; Oil palm fiber; Metal ions; chromium; palm oil; sulfuric acid; Adsorption; Byproducts; Chromium; Concentration (process); Heat treatment; Metal ions; Reaction kinetics; adsorption; aqueous solution; chromium; concentration (composition); isotherm; kinetics; modeling; removal experiment; vegetable oil; adsorption kinetics; article; desorption; flow rate; heavy metal removal; pH; waste water management; Chromium; Industrial Waste; Plant Oils; Water Pollutants, Chemical; Elaeis
Subjects:T Technology > TA Engineering (General). Civil engineering (General)
Departments / MOR / COE:Departments > Civil Engineering
ID Code:6
Deposited By: Assoc Prof Dr Isa Mohd Tan
Deposited On:11 Feb 2010 07:57
Last Modified:19 Jan 2017 08:26

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