Zd. Liu et Fm. Doyle, A thermodynamic approach to ion flotation. II. Metal ion selectivity in the SDS-Cu-Ca and SDS-Cu-Pb systems, COLL SURF A, 178(1-3), 2001, pp. 93-103
Citations number
23
Categorie Soggetti
Physical Chemistry/Chemical Physics
Journal title
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
Two thermodynamically based, theoretical models are developed to predict th
e selectivity coefficients for Ca2+/ CU2+ and Pb2+/Cu2+ in ion flotation wi
th sodium dodecylsulfate (SDS) as the collector. Pseudo selectivity coeffic
ients predicted from surface tension measurements are 1.12 and 1.69 for Ca2
+ /Cu2+ and Pb2+/Cu2+. This agrees rather poorly with experimentally measur
ed selectivity coefficients of 1.44 and 2.14, but does predict the order of
selectivity Cu2+ < Ca2+ < Pb2+. The selectivity coefficients estimated by
the dehydration model are 1.55 and 2.07 for Ca2+/Cu2+ and Pb2+/Cu2+ respect
ively, which agrees well with the experimentally measured values. (C) 2001
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