There are four basic principles for promoting the aggregation and coagulation of colloidal particles and fine suspended solids in water treatment. 

1. Charge Neutralization

2. Bridge Adsorption

3. Enmeshment and Sweeping Action

4. Compression of the Electric Double Layer

These principles do not act independently; rather, they often work concurrently in actual coagulation processes, collectively contributing to flocculation and sedimentation reactions in water treatment, ultimately achieving the goal of solid-liquid separation.

What is Coagulation for Water Treatment？

Charge Neutralization:

   Colloidal particles often carry a certain surface charge, causing them to repel each other due to like charges, thus remaining dispersed. Coagulants (such as inorganic coagulants like aluminum or iron salts, or certain organic polymers like polymeric flocculants) provide counterions that neutralize the charged surfaces of these particles, eliminating electrostatic repulsion, allowing them to come close together and bind through collisions.

Keywords:

water treatment, wastewater treatment, water treatment chemical,Water purifier, water purifying

PAC, polyaluminum chloride, polyDADMAC, cationic polymer coagulant, cationic polymer flocculant, coagulant, flocculant, Polyelectrolyte, polyquaterinum

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