Please use this identifier to cite or link to this item: https://hdl.handle.net/11147/4737
Title: ToF-SIMS depth profiling analysis of the uptake of Ba2+ and Co2+ ions by natural kaolinite clay
Authors: Shahwan, Talal
Erten, Hasan N.
Black, Leon
Allen, Geoffrey Charles
Keywords: ToF-SIMS
Depth profiling
Kaolinite
Sorption
Time-of-flight secondary ion mass spectrometry
Issue Date: Sep-2004
Publisher: Elsevier Ltd.
Source: Shahwan, T., Erten, H. N., Black, L., and Allen, G. C. (2004). ToF-SIMS depth profiling analysis of the uptake of Ba2+ and Co2+ ions by natural kaolinite clay. Journal of Colloid and Interface Science, 277(1), 23-28. doi:10.1016/j.jcis.2004.04.013
Abstract: The sorption behavior of Ba2+ and Co2+ ions on a natural clay sample rich in kaolinite was studied using time-of-flight secondary ion mass spectrometry (ToF-SIMS). Depth profiling at 10-Å steps was performed up to a 70-Å matrix depth of the clay prior to and following sorption. The results showed that Co2+ is sorbed in slightly larger quantities than Ba2+, with significant numbers of ions fixed on the outermost surface of the clay. Depletion of the ions K+, Mg 2+, and Ca2+ from the clay lattice was observed to accompany enrichment with Co2+ and Ba2+ ions. The data obtained using X-ray powder diffraction (XRPD) and scanning electron microscopy (SEM) indicated insignificant structural and morphological changes in the lattice of the clay upon sorption of both Ba2+ and Co2+ ions. Analysis using energy dispersive X-ray spectroscopy (EDS) showed that the average atomic percentage (±S.D.) of Ba and Co on kaolinite surface were 0.49±0.11 and 0.61±0.19, respectively, indicating a limited uptake capacity of natural kaolinite for both ions.
URI: http://doi.org/10.1016/j.jcis.2004.04.013
http://hdl.handle.net/11147/4737
ISSN: 0021-9797
0021-9797
Appears in Collections:Chemistry / Kimya
PubMed İndeksli Yayınlar Koleksiyonu / PubMed Indexed Publications Collection
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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