Spectrophotometric Determination of Uranium in Waste Water of Phosphoric Acid and Fertilizer Manufacturing Process

Authors : A UYANIK, N TINKILIÇ, M ODABAŞOĞLU, H KARACA

Pages : 275-284

View : 17 | Download : 7

Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :In this study, waste water drains and produced phosphate fertilizers of conventional wet-process insert ignore into journalissuearticles values(hemihydrate); phosphoric acid and phosphate fertilizer plants were investigated to determine the average uranium contents in the active manufacturing period. The method chosen for the determination of uranium was an extension of an existing spectroanalytical method and was adopted for waste water analysis as described. The results show that average uranium contents insert ignore into journalissuearticles values(mg m-3); in a three-month period are appreciable in the waste water channel of the H3PO4 unit, produce acid containing 28% P2O5 insert ignore into journalissuearticles values(20.75);, H3PO4 unit, produce acid containing 54% P2O5 insert ignore into journalissuearticles values(35.69);, NPK insert ignore into journalissuearticles values(Nitrogen, Phosphorus, Potassium fertilizer); process insert ignore into journalissuearticles values(23.94);, DAP insert ignore into journalissuearticles values(diamonium phosphate fertilizer); process insert ignore into journalissuearticles values(58.26); and dilution with the factory`s other waste water streams which contain no uranium do not help to reduce the content to the EPA`s insert ignore into journalissuearticles values(Environmental Protection Agency); stated permittable U level insert ignore into journalissuearticles values(for underground waters 20 mg m-3); in the sea discharge joint waste channel insert ignore into journalissuearticles values(34.01);. The phosphate fertilizers such as composite NPK with 15% P2O5 were also found to contain appreciable amounts of uranium, 25.28 and 51.76 respectively insert ignore into journalissuearticles values(mg kg-1);.
Keywords : Phosphate rocks, fertilizers, uranium, waste water, TOPO