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The removal of heavy metal from aqueous solutions by sawdust adsorption - Removal of copper

by Bin Yu, Y. Zhang, Alka Shukla, Shyam S. Shukla, Kenneth L. Dorris
Journal of Hazardous Materials ()

Abstract

Locally available sawdust, a byproduct of the world industry, was found to be a low cost and promising adsorbent for the removal of copper(II) from wastewater. In this work, adsorption of copper on sawdust has been studied by using batch techniques. The equilibrium adsorption level was determined to be a function of the solution pH, contact time, and sorbate concentration. The equilibrium adsorption capacity of sawdust for copper was obtained by using linear Freundlich and Langmuir isotherms. Ion exchange is probably one of the major adsorption mechanisms for binding divalent metal ions to the maple sawdust. The results provide strong evidence to support the hypothesis of adsorption mechanism. It also supplies significant sawdust operation capacity data for engineering design. (C) 2000 Elsevier Science B.V.

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