title: Temperature effect on xanthate sorption by chalcopyrite.
abstract: Xanthate ions sorption on copper ore (chalcopyrite) is studied as a function of temperature (273-293 K) in the pH range (8-11). The sorption of xanthate ions at all the pH values is observed to increase with the increase in temperature. The changes in pH, dissolution studies of the ore, SO2(4)- concentration determinations, and FTIR studies were employed to probe the mechanism of the process of adsorption. The results are found to fit successfully to the linear form of the Freundlich equation. The isosteric heats of adsorption (DeltaHi) are also calculated and show that the adsorption of xanthate on copper ore under the given experimental condition is endothermic in nature. The values of DeltaHi found are in conformity with the ion exchange sorption of xanthate by the chalcopyrite.
authors.affiliation: National Center of Excellence for Physical Chemistry, University of Peshawar, Peshawar, Pakistan. smustafa49@yahoo.com
authors.forename: S
authors.initials: S
authors.lastname: Mustafa
authors.forename: A
authors.initials: A
authors.lastname: Hamid
authors.forename: A
authors.initials: A
authors.lastname: Naeem
mesh_terms: D000327:Adsorption; D003300:Copper / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D011135:Polysaccharides, Bacterial / Q000737:chemistry*; D017550:Spectroscopy, Fourier Transform Infrared / Q000379:methods*; D013696:Temperature
chemical_list: D011135:Polysaccharides, Bacterial; C012819:chalcopyrite; D003300:Copper; C002563:xanthan gum