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The bioleaching behavior of rock phosphate
(Jordan imported) was studied using different strains of Aspergillus
niger (567, 1737 and NRRL 605). X-ray diffraction analysis revealed
the presence of fluorapatite [Ca2(PO4)3F]
as the main source of phosphorus (P). Average content of phosphorus
in test ore was 33.6% Scanning electron microscope showed the presence
of significant amount of phosphorus (P). Decrease in pH was observed
due to organic acids produced by Aspergillus niger strains during
growth on liquid media containing glucose. Maximum of 30% P O and 34%
U O was solubilized having rock phosphate pulp density 2%.
