Overview
Polyacrylamide (PAM) flocculant is a synthetic polymer derived from acrylamide monomers, engineered to aggregate suspended particles in liquids. Its high molecular weight and customizable ionic charge (anionic, cationic, or nonionic) make it versatile for industrial and environmental applications. First developed in the 1950s, PAM has become a cornerstone in wastewater treatment due to its efficiency in clarifying water by binding fine particles. It is also critical in mining, oil extraction, and paper manufacturing, where solid-liquid separation is essential.
Physical and Chemical Properties
PAM appears as a white powder or granules, dissolving readily in water to form viscous solutions. Its solubility and viscosity depend on molecular weight, which ranges from 5,000 to 20 million g/mol. The polymer’s ionic variants (anionic, cationic, or nonionic) determine its interaction with particles. PAM is stable across a broad pH range (3–10) but degrades under prolonged UV exposure or high temperatures. It does not melt but decomposes at temperatures above 200°C. The density of dry PAM is approximately 0.6–0.8 g/cm³, varying with formulation.
Main Applications
In water treatment, PAM flocculants remove suspended solids, heavy metals, and organic matter, reducing turbidity in drinking water and industrial effluents. Municipal plants and textile industries rely on cationic PAM for sludge dewatering. The mining sector uses anionic PAM to separate minerals from slurry, while oil recovery employs it to enhance drilling fluid viscosity. Paper manufacturers apply PAM to improve fiber retention and reduce wastewater loads. Agricultural runoff control is another emerging use.
Safety and Storage
While PAM is non-toxic, its dust may irritate eyes and respiratory tracts. Workers should wear gloves and masks during handling. Avoid inhalation and direct skin contact, especially with cationic variants, which may cause mild allergic reactions. Store PAM in sealed containers in a cool, dry area (<30°C) away from moisture and sunlight. Shelf life is typically 12–24 months. In case of spills, sweep up dry material and avoid washing into drains to prevent environmental contamination.
B2B Procurement Guide
Buyers should specify ionic type, molecular weight, and purity (≥90% is standard) based on the target application. Anionic PAM suits mineral processing, while cationic grades excel in sludge dewatering. Bulk orders (≥1 ton) often qualify for discounts. Verify supplier certifications (ISO 9001, REACH) and request batch-specific SDS. Prices fluctuate with acrylamide feedstock costs; current ranges are $1,500–$3,000/ton. Test samples for dissolution rate and flocculation efficiency before large-scale procurement.
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