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handle: 10261/78131
[ES]: El fosfato monocálcico monohidrato sólido encerrado en un saco de diálisis evoluciona a otro fosfato al ser puesto en contacto con una suspensión en suficiente agua de un mineral de la arcilla. En tal sistema, cuando el pH alcanza valores próximos a 4 se produce la precipitación de fosfato dicálcico dihidrato en la totalidad del sistema y, como consecuencia, sobre la superficie de los minerales. Este pH óptimo se alcanza más o menos rápidamente, dependiendo de la naturaleza del mineral de la arcilla presente. Sobreimpuesto a estos dos fenómenos puede existir otro de quimisorción de iones fosfato sobre los minerales, pero esta quimisorción parece ser menos importante en medio ácido que los fenómenos de evolución del fosfato original y de precipitación del fosfato dicálcico.
[EN]: The use of solid monocalcium phosphate monoydrate contained in dialytic bags allow these solid to react with day minerals and demonstrate that the phosphate fertilizers in contact with enough water transforms themselves to another more basic phosphate. When in these systems the pH has a value near 4 DCPD precipitates in all the system and consequently on top of the clay present, the adecuate pH being reached due to the special properties of the clay. Superimposed in these two phenomena can be another one of chimisorption which in acid medium seems to be less important than the previous ones.
14 páginas, 5 figuras, 2 tablas, 17 referencias.
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