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Sawdust--a green and economical sorbent for the removal of cadmium (II) ions.
J Hazard Mater. 2007 Jan 02; 139(1):116-21.JH

Abstract

The ability of sawdust (treated and untreated) waste, a waste material derived from the commercial processing of cedrus deodar wood for furniture production, to remove/preconcentrate Cd(II) ions from aqueous solution was determined. Sorption was found to be rapid (approximately 97% within 8 min). The binding of metal ions was found to be pH dependent, optimal sorption accruing at around pH 4-8. Potentiometric titrations of sawdust revealed two distinct pK(a) values, the first having the value similar to carboxylic groups (3.3-4.8) and second comparable with that of amines (8.53-10.2) with the densities 1.99 x 10(-4) and 7.94 x 10(-5), respectively. Retained Cd(II) ions were eluted with 5 ml of 0.1 mol l(-1) HCl. Detection limit of 0.016 microg ml(-1) was achieved with enrichment factors of 120. Recovery was quantitative using sample volume of 600 ml. The Langmuir and D-R isotherm equations were used to describe partitioning behavior for the system at different temperatures. Kinetic and thermodynamic behavior of sawdust for Cd(II) ions removal was also studied.

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Publisher Full Text

Authors+Show Affiliations

Memon SQ
M.A. Kazi Institute of Chemistry, University of Sindh, Jamshoro, Pakistan. msaima77@gmail.com
Memon N
No affiliation info available
Shah SW
No affiliation info available
Khuhawar MY
No affiliation info available
Bhanger MI
No affiliation info available

MeSH

AdsorptionCadmiumCations, DivalentCedrusEnvironmental PollutantsHydrogen-Ion ConcentrationKineticsMetalsProtonsTemperatureThermodynamicsTime FactorsWaterWater PurificationWood

Pub Type(s)

Journal Article

Language

eng

PubMed ID

16844287

Citation

Memon, Saima Q., et al. "Sawdust--a Green and Economical Sorbent for the Removal of Cadmium (II) Ions." Journal of Hazardous Materials, vol. 139, no. 1, 2007, pp. 116-21.
Memon SQ, Memon N, Shah SW, et al. Sawdust--a green and economical sorbent for the removal of cadmium (II) ions. J Hazard Mater. 2007;139(1):116-21.
Memon, S. Q., Memon, N., Shah, S. W., Khuhawar, M. Y., & Bhanger, M. I. (2007). Sawdust--a green and economical sorbent for the removal of cadmium (II) ions. Journal of Hazardous Materials, 139(1), 116-21.
Memon SQ, et al. Sawdust--a Green and Economical Sorbent for the Removal of Cadmium (II) Ions. J Hazard Mater. 2007 Jan 2;139(1):116-21. PubMed PMID: 16844287.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Sawdust--a green and economical sorbent for the removal of cadmium (II) ions. AU - Memon,Saima Q, AU - Memon,Najma, AU - Shah,S W, AU - Khuhawar,M Y, AU - Bhanger,M I, Y1 - 2006/06/10/ PY - 2006/04/08/received PY - 2006/06/02/revised PY - 2006/06/06/accepted PY - 2006/7/18/pubmed PY - 2007/4/11/medline PY - 2006/7/18/entrez SP - 116 EP - 21 JF - Journal of hazardous materials JO - J Hazard Mater VL - 139 IS - 1 N2 - The ability of sawdust (treated and untreated) waste, a waste material derived from the commercial processing of cedrus deodar wood for furniture production, to remove/preconcentrate Cd(II) ions from aqueous solution was determined. Sorption was found to be rapid (approximately 97% within 8 min). The binding of metal ions was found to be pH dependent, optimal sorption accruing at around pH 4-8. Potentiometric titrations of sawdust revealed two distinct pK(a) values, the first having the value similar to carboxylic groups (3.3-4.8) and second comparable with that of amines (8.53-10.2) with the densities 1.99 x 10(-4) and 7.94 x 10(-5), respectively. Retained Cd(II) ions were eluted with 5 ml of 0.1 mol l(-1) HCl. Detection limit of 0.016 microg ml(-1) was achieved with enrichment factors of 120. Recovery was quantitative using sample volume of 600 ml. The Langmuir and D-R isotherm equations were used to describe partitioning behavior for the system at different temperatures. Kinetic and thermodynamic behavior of sawdust for Cd(II) ions removal was also studied. SN - 0304-3894 UR - https://www.unboundmedicine.com/medline/citation/16844287/Sawdust__a_green_and_economical_sorbent_for_the_removal_of_cadmium__II__ions_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0304-3894(06)00644-3 DB - PRIME DP - Unbound Medicine ER -