Polymeric ferric sulfate and ferric chloride are excellent water purification agents, which have good flocculation in sewage treatment, and also contain trivalent iron ions. What is the difference between polymeric ferric sulfate and ferric chloride?

When ferric chloride is used to treat water, ferric hydroxide is formed by dissolving ferric chloride in water, hydrolyzing and combining with hydroxyl ion in water. It can adsorb and coagulate various fine organic matters, harmful metals and suspended particles in sewage, and achieve water purification effect after precipitation.

When PFS is used to treat wastewater, PFS dissolves in water and forms strong ferric oxide colloid, then forms alum precipitation through flocculation, which also achieves water purification effect. However, PFS is a high molecular polymer, which not only produces ferric hydroxide colloid after hydrolysis, but also forms valence complex. In water treatment, it has the functions of electric neutralization, compression of electric double layer, adsorption bridge, net precipitation and other function, The chain polymer structure has stronger adsorption force, and the formed alum flower is large and dense, which has better use effect than ferric chloride.

Polyferric sulfate and ferric chloride can achieve good results when used in appropriate places, but the effect of polyferric sulfate in water treatment is much better than that of ferric chloride. Compared with ferric chloride, the corrosion of polyferric sulfate is smaller, and the treated water has higher quality.