Understanding the science behind chemical products is crucial for optimizing their application and appreciating their capabilities. Polymeric Ferric Sulfate (PFS) is a highly effective inorganic polymer coagulant with a unique composition and properties that make it superior for water treatment. NINGBO INNO PHARMCHEM CO.,LTD. aims to shed light on the scientific foundation of PFS.

Polymeric Ferric Sulfate is essentially a pre-hydrolyzed metallic salt. Its general chemical formula is often represented as [Fe2(OH)n(SO4)3-n/2]m, where 'n' is typically less than 2 and 'm' indicates a polymeric structure. This structure is achieved through various preparation methods involving the oxidation, hydrolysis, and polymerization of ferrous sulfate or ferric sulfate in acidic solutions. Common oxidizing agents include hydrogen peroxide, sodium chlorate, or oxygen-enriched air. The specific preparation method influences the final properties of the PFS, such as its basicity (the ratio of hydroxyl to iron ions), which is a critical parameter determining its performance.

The physical appearance of PFS is typically a yellow to reddish-brown amorphous powder or granular solid. It is highly soluble in water, forming a reddish-brown transparent solution. Unlike monomeric ferric sulfate, which exists as simple molecules, PFS consists of complex polymeric species containing multiple iron atoms bridged by hydroxyl and sulfate groups. These polymeric structures, such as [Fe2(OH)3]3+, [Fe2(OH)2]4+, and [Fe3(OH)6]3+, are responsible for its enhanced coagulant properties.

Key properties that contribute to PFS's effectiveness include its high cationic charge and larger molecular weight compared to conventional coagulants. The high cationic charge allows for efficient charge neutralization of negatively charged colloidal particles in water, while the large molecular size promotes bridging between these particles, leading to the formation of larger, denser, and faster-settling flocs. This mechanism significantly improves turbidity removal, color reduction, and overall water clarity.

Furthermore, PFS exhibits a relatively low corrosiveness and a wider operating pH range (typically pH 4-11) compared to some other iron-based coagulants. This versatility reduces the need for extensive pH adjustments, simplifying the treatment process and minimizing the consumption of additional chemicals.

The scientific understanding of PFS preparation and its resulting properties allows for tailored production to meet specific water treatment needs. NINGBO INNO PHARMCHEM CO.,LTD. leverages this scientific knowledge to produce high-quality PFS that consistently delivers superior performance in various water and wastewater treatment applications.