ملخص: The effect of certain physical parameters on retention of copper 11 by calcinated wheat by-products was studied. Other parameters that also have an effect were assessed macroscopically. The effect of pH was studied thoroughly and yielded interesting findings. At a final pH less than 6, precipitation of copper is excluded as an elimination process in the presence of the by-product. The retention process is very rapid at the beginning of the experiments, which is due to surface acid-base interactions (protonic exchange). The determination of the nature of the sites on the support material surface using Bohems' method at first and second a titration method showed an amphoteric nature of the surface material. The Bohems' method resulted in an acidic nature whereas the titration method indicated a basic nature of the surface sites.

لغة: إنجليزية