Study of the Physical and Structural Properties of some Local Ninivites and Effect of Doping with some Chromium Complexes

Chemical composition, physical properties and structural characterization of natural Ninivite silica rocks have been studied. The study approach is based on using X-ray diffraction and fluorescence, differential and gravimetric thermal analysis, infrared spectroscopy, instrumental and classical chemical analysis techniques.
The results were compared with those obtained from a locally prepared and purified amorphous silica gel. Both samples were doped by selenato and oxalato chromium complexes in order to be a more active and selective adsorbent materials. Chromatographic columns were set for all the above types of adsorbents using four eluants gradually increased in polarity. The fractionation results showed significant variations in the fractions isolated according to their polarities as indicated by percentage results.