Journal
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
Volume 177, Issue 2-3, Pages 183-196Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/S0927-7757(00)00670-1
Keywords
adsorption; competitive adsorption; heavy metals; adsorbent; activated carbons; acid mine drainage treatment; ferrous; ferric; manganese; zinc
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The adsorption by activated carbons was investigated as a method to recover metal ions from acid mine drainage. The adsorption of ferrous, manganese, zinc and calcium in single, binary, ternary, and quaternary systems was studied. Equilibrium isotherms were determined at selected pHs to characterize the adsorption process. Adsorption capacities were compared in single, binary, ternary and multi-component systems for different types of activated carbons. The adsorption data fitted Freundlich and Langmuir isotherms in most of the cases. The results indicate that Langmuir isotherm fits the data better in single component systems whereas the Freundlich is better in multi-component systems. Breakthrough curves were presented to demonstrate the effectiveness of adsorption in packed bed for treatment of metal bearing wastewaters. (C) 2001 Elsevier Science B.V. All rights reserved.
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