The effective removal of dyes from aqueous waste is an important issue for many industrialized countries. The traditional treatment methods used to remove dyes from wastewater have certain disadvantages such as incomplete dye removal, high reagent and energy requirements, and the generation of toxic sludge or other waste products that require disposal. The search for alternative and innovative treatment techniques has focused attention on the use of biological materials for dye removal and recovery technologies. This brief summarizes the latest developments in this important field.

Beekaroo Dickcha and Ackmez Mudhoo

Introduction.- Literature Data., Synthetic Dyes.- Dye as a Water Pollutant.- Techniques of Colour Removal.- Biosorption: a Green Remediation.- Adsorption Process.- Experimental Methodology.-Preparation of Chemically Activated Carbon from Cocos Nucifera l..- Acid Treatment of the C. Nucifera L. Shells.- Preparation of Dye Solution.- Determination of Optimum Wavelength.- Batch Adsorption Experiments.- Equilibrium Parameters of Adsorption.- Langmuir Adsorption Isotherm Model.- Freundlich Isotherm Model.- Dubinin-Radushkevich (d-r) Isotherm Model.- Temkin Isotherm Model.- Kinetic Modelling.- Pseudo First-Order Equation.- Pseudo Second-Order Equation.- Intra-Particle Diffusion Model.- Batch Column Experiments.- Thomas Model.- Data Analysis.- Results and Discussions.- Yield of Cac's.- Characteristics of the Adsorbent.- Optimum Wavelength.- Optimum PH.- Batch Studies - Removal of RR158 with Time.- Effect of Dye Concentration on Batch Adsorption Process.- Effect of Dosages of Cac's on RR158 Dye Removal.- Equilibrium Isotherms for Batch Experiments.- Kinetic Modelling.- Batch Column Studies.- Data Analysis.- Conclusions.- References.