Activated Carbon and Nanocomposite Adsorbents Used for the Removal of Dyes and Heavy Metals from Aqueous Solution using Adsorption Technique - A Review

Abstract

Excessive discharged of dyes and heavy metals as a result of developments in the industrial activities has resulted to an increased in environmental pollution and caused serious negative effects to human and other living organisms. Activated carbon derived from agricultural residues and nanocomposites has been widely used as less expensive adsorbents mainly for the removal of various pollutants from aqueous solution and the use adsorption technique has been the most effective, less cost and promising method for the removal of wide range of pollutants. This review focuses on the use of various adsorbents derived from activated carbons and nanocomposites that has been used for the removal of toxic pollutants from aqueous solution. However, adsorption isotherms, kinetics and thermodynamics of different adsorption systems are also highlighted.