For procurement managers and R&D scientists involved in water treatment, understanding the technical specifications of chemicals like Polyaluminium Chloride (PAC) is key to achieving optimal performance and cost-effectiveness. Among the most critical parameters for PAC are its Aluminium Oxide (Al2O3) content and basicity. These figures are not mere numbers; they directly dictate the chemical's coagulating power and suitability for specific water treatment applications. NINGBO INNO PHARMCHEM CO.,LTD., as a dedicated manufacturer and supplier, aims to shed light on these vital aspects for informed purchasing decisions.

Aluminium Oxide (Al2O3) Content: The Foundation of Coagulation

The Aluminium Oxide (Al2O3) content in PAC is a measure of the actual aluminum species available for the coagulation process. It essentially represents the strength or concentration of the active coagulant in the product. Higher Al2O3 content generally indicates a more potent coagulant, capable of neutralizing a greater number of suspended particles and impurities with a smaller dosage.

  • Typical Ranges: For industrial grade PAC powder, Al2O3 content typically ranges from 28% to 31%. Drinking water grades might have slightly higher percentages, often above 30%, sometimes reaching 31%.
  • Impact on Performance: A higher Al2O3 content means more aluminum ions are available to destabilize colloidal suspensions, leading to faster and more efficient floc formation. This can be particularly advantageous in treating high-turbidity water or industrial wastewater with complex contaminant profiles.
  • Buyer Consideration: When you buy PAC, always check the specified Al2O3 content. It's a primary indicator of the product's performance potential. Ensuring you receive consistent Al2O3 levels from your supplier is crucial for maintaining stable treatment results.

Basicity: Fine-Tuning PAC's Reactivity

Basicity, often expressed as a percentage, refers to the degree of hydrolysis of aluminum in PAC. It represents the ratio of hydroxyl groups to aluminum atoms in the polymer structure. Basicity is a critical factor that influences the charge density, molecular weight distribution, and ultimately, the effectiveness of PAC across different pH levels and water conditions.

  • Understanding the Spectrum: PAC can have varying basicity levels. For example, spray-dried industrial grade PAC might have a basicity in the range of 70-85%, indicating a highly hydrolyzed product. Lower basicity, such as 45-55%, is often associated with spray-dried products designed for drinking water, which might require gentler coagulation or specific pH profiles.
  • Performance Correlation: Higher basicity generally leads to better performance in treating raw water with low temperatures and low turbidity, as it provides a more effective charge neutralization and bridging action. Conversely, lower basicity PAC might be preferred in applications where minimizing pH depression is critical.
  • Supplier's Role: A good manufacturer will offer PAC with controlled basicity levels tailored to specific applications. Communicating your water treatment challenges to your supplier, such as NINGBO INNO PHARMCHEM CO.,LTD., will help them recommend the PAC with the optimal basicity for your needs.

Why These Parameters Matter for Buyers

Understanding Al2O3 content and basicity empowers buyers to:

  • Optimize Dosage: By knowing the potency of the PAC, you can more accurately determine the optimal dosage, preventing overuse or underuse, which impacts both efficiency and cost.
  • Predict Performance: These parameters provide insights into how the PAC will perform under specific water conditions, allowing for better process control.
  • Ensure Quality Consistency: Verifying these specifications from your supplier ensures you receive a product that meets your operational requirements consistently. This is vital when purchasing PAC in bulk.

Conclusion

The Aluminium Oxide content and basicity of Polyaluminium Chloride are fundamental technical parameters that directly impact its efficacy in water treatment. As a knowledgeable supplier, NINGBO INNO PHARMCHEM CO.,LTD. emphasizes the importance of these specifications. By carefully evaluating these factors and working with a trusted manufacturer, industrial buyers can confidently select and purchase PAC that delivers superior water purification results while optimizing treatment costs. Contact us today to discuss your specific water treatment needs and find the ideal PAC solution for your facility.