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Sorption of cadmium from aqueous solution by surfactant-modified carbon adsorbents

Abdullah, MA (2009) Sorption of cadmium from aqueous solution by surfactant-modified carbon adsorbents. [Citation Index Journal]

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Abstract

Sorption capacities for cadmium, Cd(II) on indigenously prepared, steam activated, untreated, surfactantmodified carbon powder, from husk and pods of Moringa oleifera were investigated. The optimized conditions for all the experimental runs were pH 8.0±0.2, temperature 30±0.5 ◦C, contact time 120 min, agitation speed 160 rpm, initial metal concentration 30mgL−1 and adsorbent dosage 1.0 g L−1, respectively. Maximum Cd(II) removal, 98.0% was observed when cetyltrimethyl ammonium bromide (CTAB), cationic surfactant-treated carbon was used as an adsorbent. The Cd(II) removal percentages for sodium dodecyl sulphate (SDS), anionic surfactant, Triton X-100 (non-ionic surfactant) treated and untreated powder activated carbons were found to be 95.60, 81.50 and 73.36%, respectively. SEM images and BET surface area, porosity and pore volume measurements have revealed that surfactant-treated carbons have superior porosity and enhanced surface area than untreated carbons. The sorption data were correlated better with the Langmuir adsorption isotherm than Freundlich isotherm with R2 values ranging from 0.91 to 0.98.

Item Type:Citation Index Journal
Subjects:T Technology > TP Chemical technology
Academic Subject Three:petroleum engineering, geosciences
Departments / MOR / COE:Departments > Chemical Engineering
ID Code:6386
Deposited By: Dr Mohd Azmuddin Abdullah
Deposited On:05 Sep 2011 00:38
Last Modified:20 Mar 2017 01:56

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