commercial coffee wastes as materials for adsorption of heavy metals from aqueous solutions

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ID: 132145
2012
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Abstract
This work aims to study the removal of Cu(II) and Cr(VI) from aqueous solutions with commercial coffee wastes. Materials with no further treatment such as coffee residues from café may act as adsorbents for the removal of Cu(II) and Cr(VI). Equilibrium data were successfully fitted to the Langmuir, Freundlich and Langmuir-Freundlich model (L-F). The maximum adsorption capacity of the coffee residues can reach 70 mg/g for the removal of Cu(II) and 45 mg/g for Cr(VI). The kinetic data were fitted to pseudo-first, -second and -third order equations. The equilibrium was achieved in 120 min. Also, the effect of pH on adsorption and desorption was studied, as well as the influence of agitation rate. Ten cycles of adsorption-desorption were carried out revealing the strong reuse potential of these low-cost adsorbents; the latter was confirmed from a brief economic approach.
Reference Key
kyzas2012materialscommercial Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors ;George Z. Kyzas
Journal Nature Materials
Year 2012
DOI
10.3390/ma5101826
URL
http://www.mdpi.com/1996-1944/5/10/1826
Keywords
heavy metals adsorption cu(ii) cr(vi) electronics

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