The removal of heavy metals from aqueous solutions by sawdust adsorption — removal of lead and comparison of its adsorption with copper

In this work, sorption of lead on sawdust (SD) has been studied by using batch techniques. Similar to the sorption of copper, the equilibrium sorption levels for lead is a function of the solution pH, contact time, sorbent and sorbate concentration. The equilibrium adsorption capacity of sawdust for...

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Bibliographic Details
Published in:Journal of hazardous materials 2001-06, Vol.84 (1), p.83-94
Main Authors: Yu, Bin, Zhang, Y, Shukla, Alka, Shukla, Shyam S, Dorris, Kenneth L
Format: Article
Language:English
Subjects:
Adsorbents
Adsorption
Applied sciences
Chemistry
Copper - chemistry
Exact sciences and technology
General and physical chemistry
Industrial wastewaters
Industry
Kinetics
Lead
Lead - chemistry
Metal ions
Pollution
Sawdust
Surface physical chemistry
Waste Disposal, Fluid - methods
Wastewater
Wastewaters
Water treatment and pollution
Wood
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Summary:In this work, sorption of lead on sawdust (SD) has been studied by using batch techniques. Similar to the sorption of copper, the equilibrium sorption levels for lead is a function of the solution pH, contact time, sorbent and sorbate concentration. The equilibrium adsorption capacity of sawdust for lead was measured and extrapolated using linear Freundlich and Langmuir isotherms and compared with that for copper. Metal ions which are bounded to the sawdust could be stripped by acidic solution so that the sawdust can be recycled. Non-equilibrium experiments were done by using glass columns. The results indicate the potentially practical value of this method in industries and also provide strong evidence to support the adsorption mechanism proposed. Even though the focus of this work is on lead, some results from previous study for copper have been incorporated here for sake of comparison.
ISSN:0304-3894
1873-3336
DOI:10.1016/S0304-3894(01)00198-4