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Kinetics of Oleate Adsorption at a Nigerian Hematite–Water Interface

✍ Scribed by Ogbonnaya Ofor; A.C.I. Anusiem

Publisher
Elsevier Science
Year
1999
Tongue
English
Weight
62 KB
Volume
220
Category
Article
ISSN
0021-9797

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✦ Synopsis

The rate of adsorption of oleate soap onto a Nigerian hematite in an aqueous medium was determined from 29 to 60 degrees C using the differential analysis method. The activation energy and frequency factor were determined at 57.1 kJ mol(-1) K(-1) and 4.0 x 10(3) liter mol(-1) min(-1), respectively, indicating that the chemical processes are the slow, rate-determining step and that the reaction proceeds relatively fast. The adsorption isotherm was the Langmuir type: chemisorption was considered the dominant mode of adsorption. The desorption isotherm indicated a minor contribution of physical adsorption to the overall adsorption process. Copyright 1999 Academic Press.

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