Document Detail


Acidity and alkali metal adsorption on the SiO2-aqueous solution interface.
MedLine Citation:
PMID:  16290757     Owner:  NLM     Status:  PubMed-not-MEDLINE    
Abstract/OtherAbstract:
The intrinsic deprotonation constant (pK(a(2))(int)) and the intrinsic ion exchange constants (pK(Me(+))(int)) of Li(+), Na(+), and K(+) on SiO(2) were uniquely determined at 30 degrees C by using the potentiometric titration data, the Gouy-Chapman-Stern-Grahame (GSCG) model for the structure of the electrical double-layer (edl) and the double-extrapolation method. The values of these constants were pK(a(2))(int) = 6.57, pK(Li(+))(int) = pK(Na(+))(int) = pK(K(+))(int) = 5.61. The chemical meaning of intrinsic equilibrium constants and the equality in the values of pK(Li(+))(int), pK(Na(+))(int) and pK(K(+))(int) were discussed.
Authors:
Tao Zuyi; Zhang Hongxia
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of colloid and interface science     Volume:  252     ISSN:  1095-7103     ISO Abbreviation:  J Colloid Interface Sci     Publication Date:  2002 Aug 
Date Detail:
Created Date:  2005-11-18     Completed Date:  2008-09-22     Revised Date:  2009-11-11    
Medline Journal Info:
Nlm Unique ID:  0043125     Medline TA:  J Colloid Interface Sci     Country:  United States    
Other Details:
Languages:  eng     Pagination:  15-20     Citation Subset:  -    
Affiliation:
College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, People's Republic of China. dongwm@lzu.ed.cn
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