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Total iron and basicity of polyferric sulfate

Total iron and alkalinity can affect the performance of polyferric sulfate. Therefore, more attention should be paid to these two aspects when preparing the polyferric sulfate or purchasing and using it. So what are these two aspects? Let's have a look.

Polyferric sulfate all iron:

The effect of total iron content of Polyferric iron on the use effect is monotonically positive correlation. The higher the total iron content of Polyferric iron, the more polynuclear hydroxylated complexes produced by hydrolysis, and the more colloidal charges of pollutants can be neutralized, with stronger adsorption bridging and net trapping sedimentation. The pH value of 1% aqueous solution of the product is closely related to the content of total iron (with ferric ions). The higher the content of ferric ions, the more hydrogen ions will be obtained by hydrolysis, and the lower the pH value of 1% aqueous solution.

Polyferric Sulfate Basicity:

Its level depends on the amount of hydroxyl in the product. The higher the basicity is, the more unstable it is. However, too low affects the use effect of the product. At both ends of the basicity are charge density and molecular weight. The lower the basicity of polymerized ferric sulfate, the less the polynuclear complex, the higher the charge density and the smaller the molecular weight; High basicity, many polynuclear complexes, low charge density and large molecular weight.

Electric neutralization and adsorption bridging work together to remove colloidal pollutants in water, while adsorption electric neutralization and sedimentation net capture are both important means of coagulation. Therefore, the use effect of the product should not be judged simply by the level of alkalinity.

The products of ferric ion pre hydrolysis form polynuclear complexes such as [fe3 (H2O) 6 (OH) 3]6+ through bridging between hydroxyl groups. At high basicity, the equilibrium moves towards Fe (OH) 3, which weakens the ability of the product to adsorb electric neutralization, but also enhances the role of bridging and netting. Its corresponding basicity =n/6 × 100%, the higher the basicity of polymeric ferric sulfate, that is, the greater the n value, the higher the polymerization degree m of the product.

The above is a detailed introduction to the two aspects of PFS: Total Iron and alkalinity, so we can see how these two aspects have influence on PFS. Therefore, we must pay attention to these two aspects.

Thank you for your attentionHenan aierfuke Chemical Co., Ltd：Focus on water treatment, only for the healthy world! Our company is committed toPolyaluminium chloride、Polyferric sulfateThe R & D, manufacturing and sales of series of water purification materials are willing to create success with our customers and friends.