Kinetics and isotherm studies on the adsorption of hexavalent chromium onto sulphuric acid activated Mimusops elengi leaves carbon

Abstract

Hexavalent chromium [(Cr (VI))] ion is toxic and voluntarily adsorbed by some adsorbents; then, its captivating away from wastewater is very important. This study reports on the adsorption of Hexavalent Chromium from aqueous solution using activat ed carbon prepared from leaves of Mimusops elengi by sulphuric acid activation. Adsorption experiments were approved out in a batch process with various experimental parameters such as effect of contact time; initial chromium ion concentration, carbon dosage and pH on percentage removal have been studied. Kinetics of the system was studied with linearised forms of Lagergren, Ho and Webber Morris models. Equilibrium data were fitted with Langmuir, Freundlich, Temkin and Dubinin-Raduskevich isotherms.