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Title: Colloidal and surface properties of anthracite
Author: Davidson, M. I.
Awarding Body: University College of Swansea
Current Institution: Swansea University
Date of Award: 1991
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This study reports on the surface and colloidal properties of a South Wales anthracite. A detailed quantitative mineralogical analysis has been conducted in which the relative proportions of the main inorganic constituents of the sample and their distribution throughout the surface have been identified. Physical structure has been determined as extensively porous using a low temperature nitrogen adsorption technique. A quantitative analysis of the results revealed the pore system to be composed of micropores of approximately 2 nm in diameter contributing to a specific surface area of approximately 200 m2/g. Surface electrical properties have been studied in a range of univalent (e.g. NaCl, KCl, and CsCl) and divalent electrolyte solutions (e.g. MgCl2, BaCl2). Surface charge densities have been determined using a novel potentiometric titration technique. Electrophoretic mobilities and streaming potential measurements have been collected and used in the calculation of zeta potentials. Streaming potential data has been used in conjunction with Smoluchowski's equation and a correlation factor to calculate zeta potentials. Models of the anthracite/electrolyte interface have been developed and predictions of zeta potential compared to those calculated from experimental measurements.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available