Publisher: Chemical Society of Nigeria

Characterization of Some Metal Ore Surfaces Using Sodium-Palmitate and Sodium-Laurate As Adsorbates

M. U. Ibezim-ezeani, A. C. I. Anusiem
KEYWORDS: Adsorption, Flotation, Soap, Collector reagent, Metal Ore


The characterization of some metal ores surfaces obtained from Nigeria (galena, hematite and cassiterite) using sodium-palmitate and sodium-laurate as adsorbates in aqueous phase has been investigated. The specific surface area of the adsorbents are 128.7 m2/g for galena, 118.5 m2/g for hematite and 88.1 m2/g for cassiterite. The zero-point of charge of the adsorbents were 7.25 for galena, 7.30 for hematite and 7.49 for cassiterite. Maximum adsorption capacities occurred in the region of zero-point of charge of each adsorbent at 29oC. In all cases, the adsorption capacity is in the order: galena > hematite > cassiterite and correlates with the observed order in their specific surface area suggesting the importance of the specific surface area in the adsorption processes. The sodium-laurate adsorption capacities were higher than those of sodium-palmitate in all cases.

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