摘要:
The adsorption heat and reaction rate constant of potassium dichromate on the surface of galena were studied. The results indicate that potassium dichromate tends to adsorption on the galena surface. The reaction order is only 0.08385, suggesting that the concentration of potassium dichromate has little influence on its adsorption on the galena surface. In addition, the simulation of CrO
42− adsorption on the PbS (100) surface in the absence and presence of O
2 was carried out by density functional theory (DFT). The calculated results show that CrO
42− species adsorb energetically at the Pb-S bond site, and the presence of O
2 can enhance this adsorption.