Achieving crystal-clear water is paramount in numerous industries, from municipal water supply to industrial processing. At NINGBO INNO PHARMCHEM CO.,LTD., we provide high-purity aluminum sulfate, a cornerstone chemical whose scientific principles of coagulation and flocculation are fundamental to effective water clarification. Understanding these processes is key to appreciating the value of this essential compound.

Water sources, whether from rivers, lakes, or wells, often contain various impurities such as suspended solids (like silt and clay), organic matter, and dissolved substances that contribute to turbidity and coloration. Simple filtration is often insufficient to remove these minute particles, which are typically negatively charged. This negative charge causes them to repel each other, maintaining their dispersed state in the water. This is where aluminum sulfate, acting as a coagulant, plays its critical role.

When aluminum sulfate is added to water, it dissolves and dissociates into aluminum ions (Al³⁺) and sulfate ions (SO₄²⁻). The trivalent aluminum ions are positively charged and actively seek out the negatively charged suspended particles. Through a rapid mixing process, known as flash mixing, these positive ions neutralize the negative surface charges of the impurities. This charge neutralization destabilizes the particles, reducing their mutual repulsion and allowing them to approach each other.

Following coagulation, the process transitions to flocculation. In this stage, gentle mixing encourages the destabilized micro-particles to collide and aggregate. Crucially, the aluminum ions also react with water molecules and alkalinity to form aluminum hydroxide [Al(OH)₃], a gelatinous precipitate. This precipitate acts as a binder, sweeping out remaining particles and forming larger, visible aggregates known as flocs. The quality of the aluminum sulfate, such as the low iron content provided by NINGBO INNO PHARMCHEM CO.,LTD., ensures efficient formation of these effective flocs.

The resulting flocs are significantly larger and heavier than the original suspended particles. This increased density allows them to settle out of the water column through sedimentation or to be more easily captured by subsequent filtration processes. The outcome is significantly clearer, purer water. The ability to purchase this vital chemical from NINGBO INNO PHARMCHEM CO.,LTD. ensures that industries can implement these scientifically proven clarification methods reliably and cost-effectively. Our commitment is to provide the chemical foundation for clean water.