Adsorption of Co(II), Ni(II), Cu(II), and Zn(II) on hexagonal templated zirconia obtained thorough a sol–gel process: the effects of nanostructure on adsorption features

Adsorption of Co(II), Ni(II), Cu(II), and Zn(II) on hexagonal templated zirconia obtained thorough a sol–gel process: the effects of nanostructure on adsorption features

Using zirconium tetrabutoxide, diaminedecane, and diamineoctane as precursors, a templated hexagonal zirconia matrix is synthesized and characterized by X-ray diffractometry and scanning electron microscopy. The adsorption capacity of such a matrix toward Co(II), Ni(II), Cu(II), and Zn(II) from aque...

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Bibliographic Details
Published in:Journal of colloid and interface science Vol. 277; no. 1; pp. 19 - 22
Main Authors: de Farias, Robson F, do Nascimento, Ana A.S, Bezerra, Cı́cero W.B
Format: Journal Article
Language:English
Published: San Diego, CA Elsevier Inc 01-09-2004
Elsevier
Subjects:
Adsorption
Chemistry
Cobalt - chemistry
Cobalt - pharmacokinetics
Colloidal gels. Colloidal sols
Colloidal state and disperse state
Copper - chemistry
Copper - pharmacokinetics
Exact sciences and technology
Gels - chemistry
General and physical chemistry
Nanostructures
Nickel - chemistry
Nickel - pharmacokinetics
Phase Transition
Sol–gel
Surface physical chemistry
Surface Properties
Transition metals
Zinc - chemistry
Zinc - pharmacokinetics
Zirconium - chemistry
Zirconium - pharmacokinetics
Adsorption
Sol–gel
Transition metals
Zirconia
Sol-gel: Transition metals
Transition metal Ions
Sol gel process
Nanostructure
Sol gel transition
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Description
Summary:Using zirconium tetrabutoxide, diaminedecane, and diamineoctane as precursors, a templated hexagonal zirconia matrix is synthesized and characterized by X-ray diffractometry and scanning electron microscopy. The adsorption capacity of such a matrix toward Co(II), Ni(II), Cu(II), and Zn(II) from aqueous solutions is studied. The adsorption affinity of the synthesized hexagonal templated zirconia toward the cations is Cu(II)>Zn(II)⪢Ni(II)>Co(II). It is also verified that the adsorption of the cations follows a Langmuir and not a Freundlich isotherm. All obtained isotherms are of type I, according to the IUPAC classification. The observed adsorption affinity sequence can be explained by taking into account the velocity constant for the substitution of water molecules into the cation coordination spheres, as well as the Irving–Williams series.
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ISSN:0021-9797
1095-7103
DOI:10.1016/j.jcis.2004.04.014