The toxic cationic dye Fast Green FCF was studied using powdered silk. Silk is naturally obtained adsorbent and has been used in the powdered form to adsorb Fast Green FCF fast dye from wastewater. Studies have been carried out by observing the effects of pH, temperature, contact time, a concentration of dye, an amount of adsorbent, a particle size of adsorbent etc. Graphical correlation of various adsorption isotherm models like, Langmuir and Freundlich has been carried out for the adsorbent. The adsorption has been found endothermic and feasible in nature. The different thermodynamic parameters, like, Gibb’s free energy, enthalpy and entropy of the adsorption process have been evaluated. The kinetic studies proved that the adsorption process follow pseudo first order kinetics. Results of adsorption experiments showed that powdered silk exhibited high sorption capacities towards dye. The bulk removal of the dye has been carried out by treatment with adsorbent followed by filtration through the syringe filter. Desorption studies have also been put in effect to recover dye by using dilute NaOH.