Removal of acid yellow17 dye from aqueous solution using eco-friendly biosorbent. Desalination and Water Treatment.

ASHRAF, MUHAMMAD AQEEL (2013) Removal of acid yellow17 dye from aqueous solution using eco-friendly biosorbent. Desalination and Water Treatment.

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Abstract

Dyes are usually present in trace quantities in the treated effluents of many industries. The effectiveness of adsorption for dye removal from wastewaters has made it an ideal alternative to other expensive treatment methods. Biosorption of acid yellow (AY17), a monoazo acid dye, was investigated using Typha angustata L. as biosorbent in a batch system with respect to initial pH, temperature, initial dye concentration, biosorbent dosage, and contact time. The biomass exhibited the highest dye uptake capacity at 303?K, initial pH value of 2, the initial dye concentration of 150?mg/L, biosorbent dosage of 0.5?g and contact time of 40?min. The extent of dye removal increased with increase in time, biosorbent dosage and decreased with increase in temperature. The equilibrium sorption capacity of the biomass increased on increasing the initial dye concentration up to 150?mg/L and then started decreasing in the studied concentration up to 600?mg/L. The experimental results have shown that the acidic pH favors the biosorption. Langmuir and Freundlich adsorption model is used for the mathematical description of the biosorption equilibrium and isotherm constants are evaluated at different temperatures. Equilibrium data fitted very well to the Freundlich model in the studied concentration (25–600?mg/L) and temperature (303–323?K) ranges. The pseudo-first- and second-order kinetic models were also applied to the experimental data. The results indicated that the dye uptake process followed the pseudo-second-order rate expression and the adsorption rate constants increased with increasing concentration. The adsorption results in this study indicated that all the adsorbents were attractive candidates for removing acidic dyes from dye wastewater.

Item Type: Article
Uncontrolled Keywords: Wastewater treatment, Acid yellow dyes, Color removal, Adsorbents, Isotherm, Kinetics, Typha angustata L.
Subjects: Q Science
Depositing User: MR. ADNAN YAHYA
Date Deposited: 15 Apr 2013
Last Modified: 31 Aug 2013
URI: http://repository.um.edu.my/id/eprint/28011

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