The current phosphate mine wastes at El-Liffiya-Maghrabi sector, Abu-Tartur plateau, are represented by low-grade phosphorites along with overburden of glauconite and shale deposits. Although phosphorites contain sufficient concentrations of the valuable plant-nutrients (e.g. 18.29 wt% P2O5, 35.29 wt% CaO, and 14.43 wt% SO3), it holds unallowable levels of some toxic …
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