The geochemical evaluation and biological effect of Aspergillus niger on the kerogen-bearing limestone of El Galala El Qebbliay plateau, Wadi Araba area, North Eastern Desert, Egypt

This study shed the light to geochemical evaluation for the study area, important clean and environmental friendly source to collect the organic material. The action of A. niger resulted in devenish the uranium content of the limestone, and recollect it as a valuable ore.