Effect of particle association on 2,2{prime}-bipyridyl adsorption onto kaolinite
The effect of particle concentration, in kaolin suspensions, on the adsorption of 2,2{prime}-bipyridyl was studied. Adsorption expressed in units of micromoles per gram decreased as a result of the increase in particle concentration and also as a result of the presence of coagulant (0.25 M NaCl). Dispersion treatment with sodium hexametaphosphate increased the adsorption of bipyridyl. The decrease in adsorption with the increase in particle concentration suggests a possible relation between adsorption and flocculation phenomena. On the basis of classic flocculation theory a straight-line relation was obtained between the square root of the adsorption maximum (mmol/L) and particle concentration (g/L). It is concluded that particle association, which is a function of particle concentration, reduces the surface/aqueous interface and consequently the adsorption of bipyridyl.
- Research Organization:
- Univ. Nacional del Sur, Bahia Blanca (AR)
- OSTI ID:
- 20080254
- Journal Information:
- Journal of Colloid and Interface Science, Vol. 225, Issue 2; Other Information: PBD: 15 May 2000; ISSN 0021-9797
- Country of Publication:
- United States
- Language:
- English
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