1.  Removal of Industrial Dyes from Wastewaters Using Biosorbents

Authors: C.N. Buzatu, A. Todea and S.G. Muntean


Abstract:

The paper presents studies on the removal of three industrial dyes: Acid Orange 7, Methylene Blue, and Alcian Blue onto several biosorbents. As potential biosorbents, seeds of Salvia hispanica L and Linum, and two types of chitosan derivatives (blank chitosan, and magnetic chitosan particles) were investigated. Batch experiments were carried out in order to examine the effects of the biosorbent nature, initial dye concentration and contact time on dyes removal. In case of cationic dyes the best results were obtained using Salvia hispanica L. with a yield up to 61.02 %. The removal percentage decrease in order: ShL > CHM > CH for two of investigated cationic dyes (Methylene Blue, and Alcian Blue). The highest removal percentage for the Acid Orange 7 was obtained using magnetic chitosan particles (64 %), and decreases in order: CHM > CH > ShL.


Keywords: biosorbent, dyes, wastewater, adsorption kinetics

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