TY - JOUR
T1 - Study of diethyl dithiophosphate adsorption on chalcopyrite and tennantite at varied phs
AU - Petrus, H. T.B.M.
AU - Hirajima, T.
AU - Sasaki, K.
AU - Okamotob, H.
N1 - Funding Information:
The authors express appreciation for support of this research by Sumitomo Metal Mining, Co., Ltd., and Global COE program “Novel Carbon Resources Sciences, Kyushu University”. The authors would also acknowledge the support of the Hitachi Scholarship Foundation for providing a scholarship grant to H.T.B.M. Petrus.
PY - 2011/9
Y1 - 2011/9
N2 - The kinetics of diethyl dithiophosphate adsorption on chalcopyrite and tennantite has been studied by UV-visible spectroscopy at pH values of 4, 6, and 9. The concentration of diethyl dithiophosphate in the solution has been monitored as a function of time and pH for both minerals. It was found that the adsorption tendency of diethyl dithiophosphate on both minerals decreased with the increasing pH treatments. This is due to the existence of metal hydroxide species onto the mineral surface in more alkaline condition inhibiting the adsorption of diethyl dithiophosphate species. In comparison to that of chalcopyrite, tennantite possessed slightly higher adsorption of diethyl dithiophosphate in acid condition, while vice versa correlation observed at other pH treatments at where the coverage of metal hydroxide species obtained higher than that of chalcopyrite showing that the rate oxidation of tennantite is higher. An adsorption mechanism has been proposed and tested against the experimental kinetic data. Both the kinetic data and flotation studies are consistent with the proposed mechanism.
AB - The kinetics of diethyl dithiophosphate adsorption on chalcopyrite and tennantite has been studied by UV-visible spectroscopy at pH values of 4, 6, and 9. The concentration of diethyl dithiophosphate in the solution has been monitored as a function of time and pH for both minerals. It was found that the adsorption tendency of diethyl dithiophosphate on both minerals decreased with the increasing pH treatments. This is due to the existence of metal hydroxide species onto the mineral surface in more alkaline condition inhibiting the adsorption of diethyl dithiophosphate species. In comparison to that of chalcopyrite, tennantite possessed slightly higher adsorption of diethyl dithiophosphate in acid condition, while vice versa correlation observed at other pH treatments at where the coverage of metal hydroxide species obtained higher than that of chalcopyrite showing that the rate oxidation of tennantite is higher. An adsorption mechanism has been proposed and tested against the experimental kinetic data. Both the kinetic data and flotation studies are consistent with the proposed mechanism.
UR - http://www.scopus.com/inward/record.url?scp=84855831982&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84855831982&partnerID=8YFLogxK
U2 - 10.1134/S1062739147050194
DO - 10.1134/S1062739147050194
M3 - Article
AN - SCOPUS:84855831982
SN - 1062-7391
VL - 47
SP - 695
EP - 702
JO - Journal of Mining Science
JF - Journal of Mining Science
IS - 5
ER -