Please use this identifier to cite or link to this item: https://hdl.handle.net/11147/2195
Title: A characterization study of some aspects of the adsorption of aqueous Co2+ ions on a natural bentonite clay
Authors: Shahwan, Talal
Erten, Hasan N.
Ünügür, S.
Shahwan, Talal
Izmir Institute of Technology. Chemistry
Keywords: Adsorption
Bentonite
Co2+
Aqueous solution
Issue Date: Aug-2006
Publisher: Elsevier Ltd.
Source: Shahwan, T., Erten, H. N., and Ünügür, S. (2006). A characterization study of some aspects of the adsorption of aqueous Co2+ ions on a natural bentonite clay. Journal of Colloid and Interface Science, 300(2), 447-452. doi:10.1016/j.jcis.2006.04.069
Abstract: The natural bentonite used in this study contained montmorillonite in addition to low cristobalite. The uptake of aqueous Co2+ ions was investigated as a function of time, concentration, and temperature. In addition, the change in the interlayer space of montmorillonite was analyzed using XRPD, and the distribution of fixed Co2+ ions on the heterogeneous clay surface was recorded using EDS mapping. The sorbed amount of Co2+ appeared to closely follow Freundlich isotherm, with the sorption process showing apparent endothermic behavior. The relevance of the apparent Δ Ho values is briefly discussed. Analysis of the Co-sorbed bentonite samples using SEM/EDS showed that the montmorillonite fraction in the mineral was more effective in Co2+ fixation than the cristobalite fraction. XRPD analysis demonstrated that the interlayer space of montmorillonite was slightly modified at the end of sorption.
URI: http://doi.org/10.1016/j.jcis.2006.04.069
http://hdl.handle.net/11147/2195
ISSN: 0021-9797
0021-9797
Appears in Collections:Chemistry / Kimya
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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