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Details van artikel 5 van 7 gevonden artikelen
| Titel: |
Surface Properties of Coal Fines in Water. II. Isotherms, Electrokinetics and Chainlength Dependence for Cationic Surfactant Adsorption |
| Auteur: |
Ayub, A. Latiff Hayakawa, K. Taweel, A. M. Al Kwak, Jan C. T. |
| Verschenen in: |
International journal of coal preparation and utilization |
| Paginering: | Jaargang 2 (1985) nr. 1 pagina's 1-17 |
| Jaar: |
1985 |
| Inhoud: |
The adsorption of the cationic surfactants, dodecylpyridinium chloride, tetradecyl-pyridinium bromide and hexadecylpyridinium bromide on run of mine coal at varying pH's has been studied. The effect of these surfactants on the zeta potential as a function of pH was determined. Surfactant adsorption increases in the order C16 > C14 > C12, and generally increases with increasing pH, especially for the longer chainlengths. Microelectrophoretic zeta potential measurements clearly show the effect of surfactant adsorption, and when pH > iep, i.e. when the coal is negatively charged, charge reversal of the coal surface occurs in all cases. It is concluded that adsorption of cationic surfactants involves both electrostatic (headgroup) and hydro-phobic (alkyl chain) interactions with the coal surface. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 5 van 7 gevonden artikelen
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