M.A., Abdullah and M., Nadeem and M., Shabbir and S.S., Shah and G., McKay (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, surfactant-modified 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 30 mg L<sup>-1</sup> and adsorbent dosage 1.0 g L<sup>-1</sup>, 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 R<sup>2</sup> values ranging from 0.91 to 0.98. © 2008 Elsevier B.V. All rights reserved.
Item Type: | Citation Index Journal |
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Uncontrolled Keywords: | Adsorbents; Adsorption; Ammonium compounds; Anionic surfactants; Cadmium; Cadmium compounds; Cationic surfactants; Charcoal; Chemical modification; Diffusers (optical); Dyes; Isotherms; Metal recovery; Powder metals; Adsorbent dosages; Agitation speed; Aqueous solutions; BET surface area; Carbon adsorbents; Carbon powders; Cetyl tri methyl ammonium bromides; Contact time; Enhanced surfaces; Freundlich isotherms; Langmuir adsorption isotherms; Metal concentrations; Moringa oleifera; Non-ionic surfactants; Optimized conditions; Powder activated carbons; SEM images; Sodium dodecyl sulphate; Sorption capacities; Sorption datum; Surfactants; Triton x-100; Activated carbon; Moringa oleifera |
Subjects: | T Technology > TP Chemical technology |
Departments / MOR / COE: | Departments > Chemical Engineering |
Depositing User: | Dr Mohd Azmuddin Abdullah |
Date Deposited: | 27 Feb 2010 13:50 |
Last Modified: | 19 Jan 2017 08:25 |
URI: | http://scholars.utp.edu.my/id/eprint/236 |
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- Sorption of cadmium from aqueous solution by surfactant-modified carbon adsorbents. (deposited 27 Feb 2010 13:50) [Currently Displayed]