Abstract            Volume:12  Issue-11  Year-2024         Original Research Articles

Online ISSN : 2347 - 3215 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcret@gmail.com

As part of research into the transformation of mineral phosphorus into plant-available phosphorus, a comparative study of the dissolution of Tahoua natural phosphate (merchant phosphate) in hydrochloric acid, sulfuric acid and ethylene diamine tetra acetic acid (EDTA) solutions was carried out. Dissolution was carried out at various concentrations (0.01mol/L; 0.1mol/L and 1mol/L) and stirring times (1 hour, 3 hours and 5 hours) in the laboratory. The results show that for mineral acids, the dissolution rate is higher in concentrated acid solutions (1mol/L) and for the 5-hour attack time. These rates are 38.37% and 34.87% respectively for sulfuric and hydrochloric acid solutions. For EDTA, on the other hand, the results show that the highest dissolution rate is obtained in the acid solution at low concentration (0.01mol/L). It is of the order of 20.1% over the 5-hour attack time. Dissolution of Tahoua rock phosphate depends on the concentration of etching solutions and the etching time. With mineral acids (sulfuric and hydrochloric acid), dissolution increases with concentration. In EDTA, on the other hand, dissolution is low with increasing concentration.

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