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- Title
X- RAY FLUORESCENCE STUDIES OF OGUN PHOSPHATE ROCK.
- Authors
Adesanwo, O. O.; Adetunji, M. T.; Dunlevey, J. N.; Diatta, S.; Osiname, O. A.; Adesanwo, J. K.
- Abstract
Four pellets of ogun phosphorites labeled OG1, OG2, OG3 and OG4 were randomly selected and subjected to petrographic, X-ray diffraction and X- ray fluorescence analyses. Petrographic results revealed two textural forms: nodular (OG1 and OG3) and granular (OG2 and OG4). X-ray fluorescence analysis of the different varieties of Ogun Phosphorite indicate that the different lithological units have significant variations in their major and trace element content. Although in all cases the SiO2, Fe2O3, CaO, P2O5 and the Loss on Ignition (LOI) values accounted for over 91 % wt, with LOI between 11.67 and 13.37 % wt. The nodular phosphorites (OG1 and OG3) contain significantly high quantity of P2O5 (31.28 and 30.20 % wt respectively) than granular forms (OG2 and OG4) (19.73 and 11.12 wt% respectively). The P2O5 content of the fertilizer mixture used for the experiment was 17.61 % wt. The very low radionuclide and heavy metal contents (U 19 to 29 ppm, Th 5 to 13 ppm, Ba 136 to 337 ppm, Ni 41 to 80 ppm) make the transportation, handling and use of these phosphorite materials environmentally safe, even though the granular phosphorite has somewhat higher values of undesirable elements than the nodular varieties. Significant variations were also observed among the minor trace elements; even though all the samples were collected in close proximity it is therefore difficult to quantify the fertilizer value of raw Ogun Phosphorite, most especially phosphorous content.
- Subjects
PHOSPHATE rock; GRANULAR materials; SILICON oxide; AGRICULTURAL chemicals; X-ray diffraction; X-ray spectroscopy; PETROGRAPHIC microscope; ANALYSIS of variance; EXPERIMENTAL design
- Publication
Electronic Journal of Environmental, Agricultural & Food Chemistry, 2009, Vol 8, Issue 10, p1052
- ISSN
1579-4377
- Publication type
Article