Equilibrium, Kinetic Studies on the Adsorption of Acid Green 3 (Ag3) Dye Onto Azolla filiculoides as Adosorbent
Davoud Balarak, Edris Bazrafshan, Ferdos Kord Mostafapour
Chemical Science International Journal · pp. 1–10 · Published 9 Nov 2015
10.9734/ACSJ/2016/22048Abstract
Batch studies were conducted for Equilibrium, kinetics studies on the biosorption of Acid Green 3 from aqueous solution by Azolla filiculoides. The variation of pH, dose of adsorbent, contact time, concentration of Acid Green 3 Dye was investigated. The optimum conditions for the adsorption process was determined as follow: pH= 3, contact time = 90 min, adsorbent dosage=4 g/L and dye concentration=10 mg/L. The most AG3 dye removal efficiency of 99.1% was obtained in optimum conditions. Kinetic analyses were conducted using pseudo-first and second-order models. The regression results showed that the adsorption kinetics was more accurately represented by pseudo-second-order model. The adsorption isotherms are described by means of the Langmuir, Freundlich, Tempkin and Redlich–Peterson isotherms. It was found that the Langmuir equation fit better than the other equation. The study showed that Azolla filiculoides could be used as a new and efficient adsorbent material for the removal of dyes from aqueous solution.
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