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Surface acidity/basicity of road stone aggregates by adsorption from non-aqueous solutions
YKI – Ytkemiska institutet.
1991 (English)In: Colloids and Surfaces, ISSN 0166-6622, E-ISSN 1873-4340, Vol. 53, 101-116 p.Article in journal (Refereed)
Abstract [en]

The surface of several road stone aggregates were characterized by the adsorption of organic probe molecules (with acidic and basic functional groups) from cyclohexane. The results show differences in the adsorption affinity and adsorption capacity of the molecules for the different mineral surfaces. In most cases it was found convenient to represent the data by a Langmuir-Freundlich type of isotherm, which defines a quasi-Gaussian energy distribution around a peak value. From the theory a range of adsorption free energies and surface coverages (site densities) were calculated, and the heterogenity of the surfaces evaluated. Generally the interaction strengths were rationalized in terms of Lewis acid-base theory.

Place, publisher, year, edition, pages
1991. Vol. 53, 101-116 p.
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-26396OAI: oai:DiVA.org:ri-26396DiVA: diva2:1053398
Note
A653Available from: 2016-12-08 Created: 2016-12-08Bibliographically approved

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