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Adsorption of Copper and Zinc from Aqueous Solutions by Bentonite
Asian Journal of Chemistry,
Vol. 22 No. 1 (2010): Vol 22 Issue 1, 2010
Abstract
Bentonite has been used as an adsorbent for the removal of Cu2+
and Zn2+ ions from aqueous solutions via adsorption. The effect of the
adsorbent amount, pH of suspension, solution concentration and temperature
and the contact time on adsorption was investigated. The amount
of Cu2+ and Zn2+ ions adsorbed increased with increasing adsorbent
amount, pH and temperature and with decreasing concentration. The
adsorption parameters were obtained using Reciprocal Langmuir,
Langmuir, Linear Freundlich, Freundlich and Langmuir-Freundlich
isotherm models by use of non linear regression analysis. The adsorption
isotherm studies indicated that adsorption was consistent with the Reciprocal
Langmuir isotherm model. Results of the thermodynamic studies
indicated that the adsorption of both ions on bentonite was spontaneous
and favourable and an endothermic nature of adsorption. A pseudosecond
order equation described the adsorption process for either Cu2+
or Zn2+. The results of this study demonstrated that the bentonite is a
potential adsorbent for the removal of Cu2+ and Zn2+ ions from aqueous
solutions.
and Zn2+ ions from aqueous solutions via adsorption. The effect of the
adsorbent amount, pH of suspension, solution concentration and temperature
and the contact time on adsorption was investigated. The amount
of Cu2+ and Zn2+ ions adsorbed increased with increasing adsorbent
amount, pH and temperature and with decreasing concentration. The
adsorption parameters were obtained using Reciprocal Langmuir,
Langmuir, Linear Freundlich, Freundlich and Langmuir-Freundlich
isotherm models by use of non linear regression analysis. The adsorption
isotherm studies indicated that adsorption was consistent with the Reciprocal
Langmuir isotherm model. Results of the thermodynamic studies
indicated that the adsorption of both ions on bentonite was spontaneous
and favourable and an endothermic nature of adsorption. A pseudosecond
order equation described the adsorption process for either Cu2+
or Zn2+. The results of this study demonstrated that the bentonite is a
potential adsorbent for the removal of Cu2+ and Zn2+ ions from aqueous
solutions.
Keywords
Bentonite
Copper
Zinc
Adsorption
Kinetic
Isotherm.
TOMUL*, F., & TURGUT BASOGLU†, F. (2009). Adsorption of Copper and Zinc from Aqueous Solutions by Bentonite. Asian Journal of Chemistry, 22(1), 615–628. Retrieved from https://asianpubs.org/index.php/ajchem/article/view/16685
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