Abstract-In order to enhance the sorption capacity of bagasse
on direct red 81, it was treated with four acids, namely
palmitic, stearic, oleic and propionic acids. The effects of
various experimental variables pH, sorbent dose, initial dye
concentration and contact time were investigated. The kinetics
of dye adsorption fit well with the pseudo-second-order kinetic
model and it obeys the Langmiur equation.