Powders of leaves, stems and their ashes of Thespesia populnea, Pongamia pinnata and Aeschynomene aspera are found to have strong affinity towards cationic Brilliant Green Dye at high pH values. The sorption characteristics of these bio-products in controlling the Dye pollution in waste waters, are studied by varying physicochemical parameters such as pH, sorption concentration and equilibration time using simulated waste waters. The conditions for maximum extraction of the Dye have been optimized. Fivefold excess of common anions ions present in natural waters, have marginal interference on the % of extraction while Cation like Ca2+, Mg2 and Cu2+ have shown some interference but Fe2+ and Zn2+ have synergistically maintained the maximum extraction of the Dye at optimum conditions of extraction. The methodologies developed in this work have been applied to diverse waste water samples collected in different industries and are found to be remarkably successful.