The four basic principles involved in promoting the aggregation and coagulation of colloidal particles and fine suspended solids in water treatment include:

1. Charge Neutralization

2. Bridge Adsorption

3. Enmeshment and Sweeping Action

4. Compression of the Electric Double Layer

What is Coagulation for Water Treatment？

Bridge Adsorption:

   High molecular weight coagulants, such as poly-electrolytes or polyacrylamides, can adsorb onto multiple particle surfaces via their long-chain structures, forming a "bridge" that connects previously separated particles, resulting in the formation of larger flocs. This mechanism is particularly effective in treating water with low turbidity or low concentrations of colloids.

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.

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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