Читать книгу Clinical Guide to Fish Medicine - Группа авторов - Страница 119

Flocculation uses chemicals to bind particulates in order to make them bigger and easier to remove. It focuses on dissolved organic carbon. Common flocculants used in freshwater include aluminum sulfate (alum) and natural and synthetic polymers (cationic polyelectrolytes). These act by reducing surface charges on dissolved or suspended particles, allowing them to collide and coagulate. They are most effective at pH < 7.5. The effects on fish and invertebrate species are not fully known and they should be used with caution, especially where other techniques are available.