UV-Vis Spectrophotometry and AFM Observation of Diethyl Dithiophosphate Adsorption on Chalcopyrite at Varied pHs  

作　　者：Himawan T. B. M. Petrus Tsuyoshi Hirajima Keiko Sasaki Hideyuki Okamoto 

机构地区：[1]Faculty of Engineering, Kyushu University, Fukuoka 819-0395, Japan [2]Graduate School of Engineering, Kyushu University, Fukuoka 819-0395, Japan [3]Sumitomo Metal Mining Co., Ltd., Japan [4]Department of Chemical Engineering, Gadjah Mada University, Yogyakarta 55281, Indonesia

出　　处：《Journal of Chemistry and Chemical Engineering》2011年第11期1006-1013,共8页化学与化工（英文版）

摘　　要：Adsorption of diehtyl dithiophosphate on chalcopyrite has been studied using UV-visible spectroscopy at pH values of 4, 6, and 9. It was found that the adsorption of diethyl dithiophosphate decreased with the increasing pH treatments. The inhibition of diethyl dithiophosphate adsorption was found prominent in higher pH as a result of metal hydroxide species formation onto chalcopyrite surface. First order kinetic has been proposed and represented the adsorption mechanism. Flotation test using Hallimond tube has also been conducted and the results were consistent with the proposed mechanism. Furthermore, the morphological changes of the treated chalcopyrite were observed using Atomic Force Microscopy （AFM） showing the propensity of growth of islands, the new surfaces as products of the reaction. The hydrophobicity was measured in the form of force of adhesion. The results resembled with the approached mechanism.

关 键 词：CHALCOPYRITE diethyl dithiophosphate ADSORPTION kinetic study AFM FLOATABILITY 

分 类 号：O626.13[理学—有机化学] TH742[理学—化学]