Overview
Polyferric Chloride (PFC) is an advanced inorganic coagulant synthesized through the polymerization of ferric chloride. It is widely adopted in municipal and industrial water treatment due to its superior performance compared to conventional coagulants like ferric chloride or alum. PFC’s polymeric structure enhances flocculation efficiency, reducing operational costs and sludge volume. As a hydrolyzed intermediate of ferric salts, PFC exhibits a high positive charge density, enabling rapid aggregation of colloidal particles. Its effectiveness spans a broad pH range (4–11), making it adaptable to diverse water qualities. The product is available in liquid (10–12% Fe) or solid (20–30% Fe) forms.
Physical and Chemical Properties
PFC is characterized by its dark brown color and viscous liquid or powdered form. The solution has a density of 1.45–1.50 g/cm³ and is highly soluble in water. Its polymeric structure, represented by the formula [Fe2(OH)nCl6-n]m, provides a high charge density for effective destabilization of contaminants. Key chemical properties include a high basicity (40–90%), which influences coagulation performance, and low residual iron content (<0.1 mg/L in treated water). PFC is stable under normal storage conditions but decomposes at elevated temperatures, releasing hydrochloric acid fumes.
Main Applications
PFC is primarily used in drinking water purification, wastewater treatment, and industrial process water conditioning. It effectively removes turbidity, phosphorus, heavy metals (e.g., arsenic, cadmium), and organic matter. In textile and paper industries, PFC aids in color removal and sludge dewatering. Its advantages include faster sedimentation, reduced chemical consumption, and lower aluminum residuals compared to alum-based coagulants. PFC is also employed in oil-field water treatment and landfill leachate management, where high pollutant loads require robust coagulation.
Safety and Storage
PFC is corrosive and requires careful handling. Use PPE (gloves, goggles) to prevent skin/eye contact. Store in HDPE or fiberglass tanks away from sunlight and moisture to prevent degradation. Liquid PFC may freeze at low temperatures; insulated storage is recommended in cold climates. Spills should be neutralized with alkaline materials (e.g., lime) and contained to prevent environmental release. Dispose of waste in compliance with local regulations. PFC is incompatible with strong oxidizers and bases.
B2B Procurement Guide
When sourcing PFC, prioritize suppliers with ISO 9001 certification and third-party quality testing. Key specifications to verify include iron content (≥10%), basicity (40–90%), and heavy metal limits (e.g., <0.01% cadmium). Liquid PFC is cost-effective for large-scale operations, while solid PFC suits remote areas with transportation constraints. Request batch-specific COAs (Certificates of Analysis) and evaluate samples for coagulation performance. Bulk purchases (20+ tons) typically offer 5–10% cost savings. Consider regional logistics; some suppliers provide toll manufacturing for on-site production.
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