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  • Title: Simulation of methylene blue adsorption by salts-treated beech sawdust in batch and fixed-bed systems.
    Author: Batzias FA, Sidiras DK.
    Journal: J Hazard Mater; 2007 Oct 01; 149(1):8-17. PubMed ID: 17433537.
    Abstract:
    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.
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