Abstract
ABSTRACT As we all know, sodium oleate (NaOL) is usually used as a collector for oxidized minerals, but in this study, it is used as an activator for feldspar to separate from quartz. Therefore, the adsorption mechanism, topography, and configurations of NaOL on the quartz and feldspar surface were investigated using X-ray photoelectron spectroscopy, atomic force microscope, and molecular dynamics simulation at the atomic level. The results revealed that NaOL preferably interacted with the Al atoms on the feldspar surface mostly in the form of chemical adsorption and made the feldspar surface blurry and rough, so NaOL could activate feldspar and enhance its flotability. However, NaOL hardly reacts or is easily desorbed from the quartz surface. Thus, the adsorption differences of NaOL between the quartz and feldspar surfaces contributed to realize the effective separation of quartz and feldspar.
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