Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6302490 | Ecological Engineering | 2013 | 10 Pages |
Abstract
The kinetics of adsorption is described by a pseudo-second order reaction kinetic model, allowing the determination of kinetic parameters for each of the considered metal ions. The ion exchange mechanism was confirmed assuming that the alkali-earth metals (mostly calcium), from wheat straw, are substituted by the considered heavy metal ions and protons. For a single metal ion system, the adsorption equilibrium data can be modeled by the Langmuir adsorption isotherm for all considered ions. The maximum adsorption capacity of 5 mg gâ1 was achieved for copper ions, while the adsorption capacity for nickel and zinc ions was 2.5 mg gâ1 and 3.25 mg gâ1, respectively. The obtained results show that wheat straw can be successfully used as an adsorbent for the adsorption of Cu2+, Zn2+ and Ni2+ ions from weakly acidic effluents.
Related Topics
Life Sciences
Agricultural and Biological Sciences
Ecology, Evolution, Behavior and Systematics
Authors
Milan Gorgievski, Dragana BožiÄ, Velizar StankoviÄ, Nada Å trbac, Snežana Å erbula,