Structure and orientation of collectors adsorbed at the ZnS/water interface

The adsorption of O,O-dibutyidithiophosphate and 2-mercaptobenzothiazole on the surface of ZnS has been studied by using the attenuated total reflecti on (ATR) technique. By utilizing polarized infrared radiation, we got quali tative information about the orientation of the adsorbed collectors. The di fference between the absorbance of the s-polarized light and the absorbance of p-polarized light was used to draw conclusions about the orientation. T he influence on the orientation of 0,O-dibutyldithiophosphate and 2-mercapt obenzothiazole when adsorbing from a mixture of the two collectors is also reported, as well as the influence of these collectors on the hydrophobicit y of the ZnS surface obtained by contact angle measurements. (C) 2001 Acade mic Press.