Adsorption mechanism of copper xanthate on pyrite surfaces

Ab Initio Modeling of Xanthate Adsorption on ZnS Surfaces

Modeling surface adsorption requires systems of hundreds of atoms. To model such systems at an ab initio level successfully, we need to avoid traditional quantum chemical methods. In the present work we have shown that density functional theory is a powerful modeling tool for large chemical systems especially in combinations with pseudopotentials This is validated by an initial study of ethyl a...

Exploring mechanism of xanthate adsorption on chalcopyrite surface: An atomic force microscopy study

In this work, adsorption of the potassium amyl xanthate collector on the pure chalcopyrite surface was studied by applying atomic force microscopy (AFM). The adsorption experiments were carried out at different concentrations of the collector and at diverse pH values in the presence or absence of exterior ions. The changes occurring in the surface morphology of chalcopyrite due to the collector...

Nitrogen adsorption and desorption at iron pyrite FeS2{100} surfaces.

We have investigated the interaction of nitrogen with single-crystal iron pyrite FeS(2){100} surfaces in ultra-high vacuum. N(2) adsorbs molecularly at low temperatures, desorbing at 130 K, but does not adsorb dissociatively even at pressures up to 1 bar. Atomic surface N can, however, be obtained with nitrogen ions and/or excited neutral species, generated by passing N(2) through an ion gun. S...

Electrochemistry of Copper Activation of Sphalerite and Potassium Isobutyl Xanthate (KIBX) Synthesized Collectors Adsorption

Selective adsorption of Mycobacterium Phlei on pyrite and sphalerite.

The adsorption of Mycobacterium Phlei cells on the surfaces of pyrite and sphalerite was studied as functions of time and pH. The results indicated that a higher amount of cells adsorbing onto pyrite compared with that onto sphalerite under neutral and alkaline conditions, and it was also observed from photographs of scanning electron micrograph. To gain a better insight into the mechanisms of ...