Analysis of Phosphorus Removal Efficiency by Polyferric Sulfate

Polyferric sulfate(PFS), as a high-molecular-weight iron salt polymer, has been widely used in the field of water treatment due to its excellent phosphorus removal efficiency. Below is a detailed analysis of the phosphorus removal mechanism and practical application effects of polyferric sulfate. Let's learn more about it together with the PFS manufacturer!

I. Phosphorus Removal Mechanism of PFS

Polyferric sulfate is an effective phosphorus removal agent, primarily removing phosphorus from water through adsorption and catalytic oxidation. Its phosphorus removal mechanism is based on the following points:

Adsorption Effect:

Polyferric sulfate has a surface rich in iron oxide (Fe-O) functional groups and a porous structure, which enables it to effectively adsorb phosphorus in water. Phosphate ions (PO₄³⁻) exist as anions in water and undergo adsorption with the iron oxide functional groups on the surface of PFS, forming iron phosphate complexes. This adsorption effect targets not only soluble phosphorus but also has a certain adsorption capacity for insoluble phosphorus.

Catalytic Oxidation Effect:

Polyferric sulfate also exhibits oxidizing properties, which can convert oxidized forms of phosphorus (e.g., HPO₄²⁻) into more easily precipitable phosphates (e.g., FePO₄). This transformation makes phosphorus easier to remove from water.

Precipitation Effect:

The reaction between polyferric sulfate and phosphorus is a chemical adsorption process, where phosphorus molecules attach to the surface of PFS crystals, forming stable iron phosphate precipitates. These precipitates can then be removed from water through sedimentation or filtration.

II. Practical Application Effects of PFS

In practical applications, polyferric sulfate has demonstrated outstanding phosphorus removal efficiency. Below are some specific application cases and effect analyses:

Urban Drinking Water and Industrial Circulating Water Purification:

Polyferric sulfate is widely used as a phosphorus removal agent in the purification of urban drinking water and industrial circulating water. By adding an appropriate amount of PFS, phosphorus in water can be effectively removed, ensuring that water quality meets relevant standards.

Industrial Wastewater Treatment:

Polyferric sulfate also plays a significant role in the treatment of industrial wastewater from industries such as chemical, petroleum, mining, papermaking, printing and dyeing, brewing, and steel. Wastewater from these industries often contains high concentrations of phosphorus. By adding polyferric sulfate, phosphorus can be converted into precipitates and removed, thereby purifying the wastewater.

High Turbidity Water Treatment:

Polyferric sulfate also exhibits good phosphorus removal efficiency in highly turbid water. In experiments, when the water is generally turbid (turbidity of 100–500 mg/L), adding 30–50 kg of PFS per thousand tons of wastewater can achieve significant phosphorus removal effects.

Additionally, polyferric sulfate has the advantages of low dosage, high efficiency, and simple operation. Compared to traditional phosphorus removal agents such as aluminum sulfate, PFS requires less dosage but achieves better phosphorus removal efficiency. At the same time, its operation process is relatively simple and does not require complex equipment or processes.

In summary, as an efficient phosphorus removal agent, polyferric sulfate demonstrates excellent phosphorus removal efficiency through the combined effects of adsorption, catalytic oxidation, and precipitation. In practical applications, whether in urban drinking water purification, industrial wastewater treatment, or high turbidity water treatment, polyferric sulfate has shown excellent performance and broad application prospects.