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Polyacrylamide - Cationic
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Cationic polyacrylamide (CPAM) is a linear polymer compound.
Structural Characteristics
Cationic polyacrylamide has positively charged groups on its molecular chain, such as amino groups (-NH₃⁺), which allows it to attract negatively charged substances.
Physical and Chemical Properties
1. Appearance: Usually a white powder or granular form, and there are also emulsion products.
2. Solubility: Easily soluble in water, forming a transparent solution with a certain viscosity. The viscosity of the solution is related to factors such as the molecular weight of the product.
3. Stability: Relatively stable under normal environmental conditions, but may undergo changes such as molecular chain breakage under extreme conditions like high temperature, strong acids, and strong bases.
Mechanism of Action
1. Charge Neutralization: Cationic polyacrylamide can electrostatically attract negatively charged suspended particles in water (such as clay particles, organic particles, etc.), neutralizing the negative charge on the particle surface, reducing the repulsive force between particles, and facilitating their aggregation.
2. Adsorption Bridging: The molecular chain can adsorb multiple particles, connecting them like a bridge to form larger flocs, which are easier to precipitate or filter out.
Main Uses
1. Wastewater Treatment:
For wastewater containing a large number of negatively charged colloidal particles and organic matter, such as dyeing wastewater and papermaking wastewater, cationic polyacrylamide can quickly flocculate and precipitate, removing suspended solids, color, and some organic matter from the wastewater, thereby reducing chemical oxygen demand (COD). In the sludge dewatering process, it can aggregate sludge particles, improve the dewatering performance of the sludge, and increase the dryness of the sludge for subsequent treatment.
2. Papermaking Industry:
As a paper strengthening agent, it can bond with paper fibers to increase the strength of the paper, including tensile strength and tear strength. It can improve the retention and filtration performance of the paper, reduce the loss of fibers and fillers during the papermaking process, and enhance the quality and production efficiency of the paper.
3. Mining Industry: In the mineral processing process, it can be used for the treatment of tailings wastewater, separating useful minerals and impurities from the tailings while recovering water resources.
Packaging: Keep dry and protected from rain, avoid exposure to sunlight. Each bag weighs 25kg.
Storage and Transportation: Store in a cool, dry, and clean warehouse, and protect from moisture.
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