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Adsorption Kinetics and Isotherms Studies of Acid Azo Dye based on Anthranilic Acid and ÃŽÂ’-Naphthol on Jute Fabric

Pallavi Sarkhela1*, PK Srivastavaa1, Prashanta Sarkhelb2

Jute is a long, soft, silky shiny natural fiber that can be spun into coarse and strong threads and is also called “the golden fiber” for its golden colour and high cash value. Dyeing experiments were carried out on bleached and unbleached jute fabrics with an Azo dye 2-hydroxynaphthaazo benzoic acid at various concentrations i.e. 2%, 4%, 6%, 8% and 10% (owf) at 80°C. It was seen that a concentration of 8% (owf), pH of 9.5-10.5 and temperature of 80°C is the ones that produced the most effective result in bleached and unbleached jute dyeing. The kinetic data showed that the mechanism of dyeing bleached and unbleached jute fabric follows the first order kinetics which is related to the chemisorption process as the rate-controlling step. The equilibrium data for bleached and unbleached jute were adjusted to the Langmuir-Freundlich model indicating a considerable contribution to the chemisorption process in a monolayer fashion.