The effectiveness of Polyaluminium Chloride (PAC) in water purification lies in its sophisticated chemical properties. NINGBO INNO PHARMCHEM CO.,LTD. is proud to supply PAC, and understanding its chemical action is key to appreciating its role as a leading coagulant. PAC, an inorganic polymer coagulant, works through a process of charge neutralization and bridging, efficiently removing impurities from water.

The primary mechanism involves the positively charged aluminum species within the PAC molecule. Many contaminants in water, such as suspended solids, colloidal particles, and dissolved organic matter, carry a negative charge. When PAC is introduced into the water, these positively charged aluminum species neutralize the negative charges on the contaminants. This neutralization process destabilizes the particles, causing them to aggregate and form larger, visible clumps known as flocs. This is a fundamental aspect of polyaluminium chloride water treatment.

Following charge neutralization, PAC also facilitates floc formation through a bridging mechanism. The polymeric chains of PAC can adsorb onto multiple particles simultaneously, effectively linking them together. This bridging action creates larger and more compact flocs than would be possible through charge neutralization alone. These larger flocs are much easier to remove from the water through sedimentation or filtration processes.

The efficiency of PAC in forming these flocs is a significant advantage. It leads to faster clarification times and a higher degree of turbidity removal compared to simpler inorganic salts. The specific composition of PAC, including its basicity and aluminum content, can be tailored to optimize its performance for different types of water contaminants. This chemical versatility allows for precise application in various industrial wastewater treatment chemicals scenarios.

The chemical reaction involves hydrolysis, where the aluminum ions in PAC react with water to form various hydroxy-aluminum species. These species, such as the Al13 polymer often cited, are highly effective at entrapping and removing impurities. The controlled polymerization in PAC ensures a consistent and highly active form of aluminum, leading to predictable and reliable treatment outcomes.

In essence, PAC's chemical structure and behavior are specifically designed for efficient contaminant removal. By understanding these chemical principles—charge neutralization and bridging—we can better appreciate why PAC is such a powerful tool for achieving clean and safe water. NINGBO INNO PHARMCHEM CO.,LTD. provides high-purity PAC, ensuring that these beneficial chemical reactions occur effectively in your water treatment processes.