Commercial Coffee Wastes as Materials for Adsorption of Heavy Metals from Aqueous Solutions

By G. Kyzas. Materials, 2012

145 citations recorded by the source corpus.

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.

Subfields: Mechanical Engineering, Water Science and Technology

View Paper: https://www.semanticscholar.org/paper/1b332f613244935b7d9cc9b4dd97b38c8f2ffbbc

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In Mechanical Engineering

1. P. Singh
2. Sneh Lata
3. S. R. Samadder

In Water Science and Technology

1. P. Singh
2. Sneh Lata
3. S. R. Samadder

Citations in the corpus

• Regeneration of adsorbents and recovery of heavy metals: a review (2015, background): “A study was conducted by Kyzas (2012) to understand the applicability of commercial coffee wastes as adsorbent for removal of Cu(II) from aqueous solutions and the possible reuse of the coffee residuals in sequential adsorption– desorption cycles.”