Polyacrylamide is currently one of the most widely used water treatment chemicals in China's water purification sector. Numerous varieties have been developed for treating wastewater across different industries: cationic polyacrylamide, anionic polyacrylamide, non-ionic polyacrylamide, and amphoteric polyacrylamide. Its applications are extensive. Selecting the appropriate type is critical, necessitating prior sampling of the wastewater. Conducting beaker tests in the laboratory helps determine the most suitable type and dosage. Furthermore, polyacrylamide is relatively expensive, costing considerably more than polyaluminium chloride. To avoid wasting water purification costs, what issues should we be mindful of when using polyacrylamide? Today, Victor Water Purification's editor, Ah Rong, provides a detailed introduction and analysis.
- Polyacrylamide readily undergoes hydrolysis. Prepared solutions must be utilised within the same day. Prolonged storage diminishes purification efficacy, with effectiveness declining over time. This prevents wastage.
- Polyacrylamide solutions form a network structure through interparticle cross-linking. Higher temperatures in the raw water accelerate molecular movement, disrupting molecular chains and breaking the network structure. This reduces viscosity and significantly diminishes the flocculation and purification efficacy. Therefore, when preparing polyacrylamide solutions, the raw water temperature must not exceed fifty degrees Celsius.
- Polyacrylamide readily absorbs moisture. During transportation and storage, ensure packaging is tightly sealed. Store in a dry, well-ventilated area away from direct sunlight to prevent moisture absorption and clumping, thereby avoiding unnecessary wastage.
- The viscosity of prepared polyacrylamide solutions increases with higher concentrations. At elevated concentrations, viscosity decline becomes markedly more pronounced. This occurs because the cohesive force between polymer molecules arises from their continuous motion and mutual interaction. At higher concentrations, the polyacrylamide solution exhibits gel-like properties. Consequently, increased concentration intensifies intermolecular interactions, facilitating chain cross-linking and thereby enhancing the solution's cohesive strength.
The above outlines key considerations when using polyacrylamide. Prior to application, conduct preliminary trials to ensure optimal water purification results. This article is compiled and published by Victor Water Purification. Please credit the source when reproducing. Thank you. We hope this information proves beneficial.
