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Principio coagulante del policloruro de aluminio.

2025,11,04
En el agua, las partículas suelen permanecer suspendidas debido a las cargas eléctricas en sus superficies. El cloruro de polialuminio PAC altera el entorno iónico aumentando la concentración de iones, comprimiendo la doble capa eléctrica y permitiendo que las partículas se acerquen. A medida que la repulsión se debilita, las fuerzas de van der Waals promueven la agregación y la sedimentación.
El PAC de cloruro de polialuminio también funciona adsorbiendo partículas cargadas y neutralizando su carga superficial. Esto reduce la repulsión electrostática, lo que facilita la agregación de partículas.
Los productos de cloruro de polialuminio PAC a base de polímeros contienen moléculas de cadena larga que pueden unir múltiples partículas. Cuando estos polímeros se adsorben en las superficies de las partículas, partes de la molécula se extienden hacia la solución, capturando otras partículas y formando una estructura similar a una red.
A ciertos niveles de pH y dosis, el PAC de cloruro de polialuminio forma precipitados de hidróxido y carbonato (como Al(OH)3, Fe(OH)3, CaCO3), que enredan y atrapan los sólidos suspendidos. Estos precipitados se asientan rápidamente y mejoran la claridad.
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