METAL-IONS AND DEXTRIN ADSORPTION ON PYRITE

For dextrin to interact with pyrite, metal oxidation species are requi red on the surface. A surface cleaned of such species did not adsorb d extrin while after oxidation or doping with metal ions, dextrin did ap pear on the surface. The type of metal ion may not be important, howev er; doping with both Fe and Pb ions promoted adsorption. This may have implications for selective depression using dextrin, as mineral surfa ces in practice are often contaminated with a similar variety of metal ions derived from the other minerals. (C) 1997 Published by Elsevier Science Ltd.