Simulation of methylene blue adsorption by salts-treated beech sawdust in batch and fixed-bed systems

Batch and column kinetics of methylene blue adsorption on calcium chloride, zinc chloride, magnesium chloride and sodium chloride treated beech sawdust were simulated, using untreated beech sawdust as control, in order to explore its potential use as a low-cost adsorbent for wastewater dye removal....

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Bibliographic Details
Published in:Journal of hazardous materials 2007-10, Vol.149 (1), p.8-17
Main Authors: Batzias, F.A., Sidiras, D.K.
Format: Article
Language:English
Subjects:
Adsorption
Applied sciences
Calcium chloride
Chemical engineering
Chlorides - chemistry
Coloring Agents - chemistry
Column
Computer Simulation
Dyes
Exact sciences and technology
Fagus
General purification processes
Kinetics
Magnesium chloride
Methylene blue
Methylene Blue - chemistry
Other industrial wastes. Sewage sludge
Pollution
Pretreatment
Salts
Sawdust
Simulation
Sodium chloride
Wastes
Wastewaters
Water Pollutants, Chemical - chemistry
Water Purification - methods
Water treatment and pollution
Wood
Zinc chloride
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Summary:Batch and column kinetics of methylene blue adsorption on calcium chloride, zinc chloride, magnesium chloride and sodium chloride treated beech sawdust were simulated, using untreated beech sawdust as control, in order to explore its potential use as a low-cost adsorbent for wastewater dye removal. The adsorption capacity, estimated according to Freundlich's model, the Langmuir constant K L and the adsorption capacity coefficient values, determined using the Bohart and Adams’ bed depth service model indicate that salts treatment enhanced the adsorption properties of the original material. Since sawdust is an industrial waste/byproduct and the salts used can be recovered as spent liquids from various chemical operations, this process of adsorbent upgrading/modification might be considered to take place within an ‘Industrial Ecology’ framework.
ISSN:0304-3894
1873-3336
DOI:10.1016/j.jhazmat.2007.03.043