Adsorption of reactive dye by keramzite beads in a batch and fixed bed column mode
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anhnt@hcmute.edu.vnKeywords:
Batch adsorption, fixed bed column adsorption, Bohart Adam equation, reactive dye, Karemzit gravelAbstract
Keramzite gravel is widely used in construction and agriculture. Keramzite is used as material to produce light-weight concrete and fixed bed for the growing vegetables. This material is now known as a completely new and cheap absorbent material. Surprisingly, the adsorption capacity of the reactive dyes on the Keramzite gravel has been successful and is the precondition for the production of other gravel particles with higher toxicity. This research was carried out on the batch adsorption and the fixed bed column mode. The adsorption is well described with the Langmuir, Freundlich, and Bohart Adams model. Moreover, the adsorption isotherms were better described by the Langmuir equation than by the Freundlich equation. The results also indicated favorable adsorption nature and these dyes are favorably adsorbed on Karemzit and activated carbon. Optimal adsorption at pH 3 and 6, gravel size 5-10 mm,adsorption time 50 minutes, maximum adsorption capacity of 0.284 and 0.455 mg/g corresponding to SUNCION RED HE7B and SUNCION BLUE HEGN.
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