NINGBO INNO PHARMCHEM CO.,LTD. is dedicated to providing high-performance chemicals for water treatment, and at the core of this mission lies an understanding of the chemistry that drives their efficacy. Polyaluminium Chloride (PAC) is a prime example, a sophisticated inorganic polymer coagulant whose effectiveness stems from its unique chemical structure and reaction pathways. Understanding how PAC works is key to appreciating its role in delivering clean water.

The fundamental mechanism by which Polyaluminium Chloride purifies water involves two primary processes: coagulation and flocculation. In the coagulation phase, PAC dissociates in water to form highly charged polynuclear aluminum ions. These positively charged species neutralize the negative surface charges of suspended particles, colloids, and dissolved organic matter present in the raw water. This neutralization process weakens the repulsive forces between these particles, allowing them to approach each other more closely.

Following coagulation, the flocculation stage begins. The polynuclear aluminum species, particularly the highly active Al13 species, act as effective bridging agents. They adsorb onto multiple destabilized particles, physically linking them together. This process leads to the formation of larger, amorphous, and often gelatinous flocs. The larger size and higher density of these flocs are critical for subsequent removal. Unlike the single-step process of simpler salts, PAC's polymeric structure facilitates more efficient charge neutralization and bridging, resulting in denser and more settleable flocs.

The chemical composition of PAC, often represented by the general formula [Al2(OH)nCl6-n]m, indicates a complex equilibrium of various aluminum species. The ratio of hydroxyl (OH) to aluminum (Al) ions, known as basicity, is a crucial parameter that influences PAC's performance. Higher basicity generally correlates with a greater proportion of highly polymerized aluminum species, which are more efficient in destabilizing and removing contaminants. NINGBO INNO PHARMCHEM CO.,LTD. carefully controls these parameters during production to ensure optimal product performance for various water treatment scenarios.

The advantages of PAC's chemistry are evident in its ability to work effectively across a broad pH range. The inherent buffering capacity of PAC's polymeric structure helps to minimize significant pH shifts in the treated water, reducing the need for additional alkali chemicals. This inherent stability and broad pH efficacy contribute to its status as a cost-effective and efficient water treatment solution. When considering Polyaluminium Chloride applications, its chemical behavior is the foundation of its success.

In essence, the advanced chemistry of Polyaluminium Chloride provides a more robust and efficient pathway to clean water compared to older coagulants. By understanding and leveraging these chemical principles, industries can achieve higher water quality, reduce operational costs, and enhance the sustainability of their water management practices. NINGBO INNO PHARMCHEM CO.,LTD. is proud to offer PAC products that embody this chemical sophistication and deliver tangible results.