Adsorption of Congo Red Dye over Pendent Chlorobenzylidine Rings Present on Polythioamide Resin: Kinetic and Equilibrium Studies

T. Vidhyadevi Department of Applied Science and Technology, AC Tech, Anna University, Chennai, India

A. Murugesan Department of Applied Science and Technology, AC Tech, Anna University, Chennai, India

S. Dinesh Kirupha Department of Applied Science and Technology, AC Tech, Anna University, Chennai, India

P. Baskaralingam Department of Applied Science and Technology, AC Tech, Anna University, Chennai, India

L. Ravikumar Department of Chemistry, C.B.M. College, Coimbatore, India

S. Sivanesan Department of Applied Science and Technology, AC Tech, Anna University, Chennai, IndiaCorrespondence[email protected]

Abstract

The removal of Congo Red (CR) from an aqueous solution, using aromatic polythioamide resin (PTA) was studied. The effective pH and equilibrium time for the maximum adsorption of the CR on the PTA is found to be 7 and 45 min, respectively. Among the three kinetic models studied, the pseudo-second order kinetic model describes adsorption of the CR on the PTA efficiently. The maximum adsorption capacity of PTA for CR calculated from the Langmuir isotherm is 452.1 mg/g. The surface morphology of the PTA and dye adsorbed PTA were determined using scanning electron microscopy. The adsorption efficiency of the PTA was retained even after four cycles.

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Adsorption of Congo Red Dye over Pendent Chlorobenzylidine Rings Present on Polythioamide Resin: Kinetic and Equilibrium Studies

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Adsorption of Congo Red Dye over Pendent Chlorobenzylidine Rings Present on Polythioamide Resin: Kinetic and Equilibrium Studies

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