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Adsorption of copper (II), chromium (III), nickel (II) and lead (II) ions from aqueous solutions by meranti sawdust.

Authors :
Rafatullah M
Sulaiman O
Hashim R
Ahmad A
Source :
Journal of hazardous materials [J Hazard Mater] 2009 Oct 30; Vol. 170 (2-3), pp. 969-77. Date of Electronic Publication: 2009 May 21.
Publication Year :
2009

Abstract

The present study proposed the use of meranti sawdust in the removal of Cu(II), Cr(III), Ni(II) and Pb(II) ions from synthetic aqueous solutions. Batch adsorption studies showed that meranti sawdust was able to adsorb Cu(II), Cr(III), Ni(II) and Pb(II) ions from aqueous solutions in the concentration range 1-200mg/L. The adsorption was favoured with maximum adsorption at pH 6, whereas the adsorption starts at pH 1 for all metal ions. The effects of contact time, initial concentration of metal ions, adsorbent dosage and temperature have been reported. The applicability of Langmuir, Freundlich, and Dubinin-Radushkevich (D-R) isotherm was tried for the system to completely understand the adsorption isotherm processes. The adsorption kinetics tested with pseudo-first-order and pseudo-second-order models yielded high R(2) values from 0.850 to 0.932 and from 0.991 to 0.999, respectively. The meranti sawdust was found to be cost effective and has good efficiency to remove these toxic metal ions from aqueous solution.

Details

Language :
English
ISSN :
1873-3336
Volume :
170
Issue :
2-3
Database :
MEDLINE
Journal :
Journal of hazardous materials
Publication Type :
Academic Journal
Accession number :
19520510
Full Text :
https://doi.org/10.1016/j.jhazmat.2009.05.066