2.2. Reagents
Sodium oleate (CH3(CH2)7CH@CH(CH2)7COONa) (NaOL) was
used as the anionic collector for the micro-flotation tests. Iron(III)
chloride hexahydrate (FeCl36H2O) was used as the source of Fe(III)
activator. HCl and NaOH were used for the pH adjustment in the
experiments. Pyrene was used for pyrene fluorescence spectroscopy.
All the chemicals were of analytical grade, and the water
used in all the experiments was ultra-pure water (18.25 MX cm).