Aluminum Sulfate
Aluminum Sulfate is a highly effective primary coagulant used extensively in water and wastewater treatment, paper manufacturing, and various industrial applications.
Description
Aluminum Sulfate, with the chemical formula Al2(SO4)3 and CAS number 10043-01-3, is a widely utilized inorganic compound. It typically presents as a white to off-white crystalline solid or powder, highly soluble in water, and forming acidic solutions. Its primary function as a coagulant stems from its ability to hydrolyze in water, producing aluminum hydroxide precipitates which are highly effective in aggregating suspended solids, colloids, and other impurities. This process facilitates their removal through sedimentation or filtration. Commonly referred to as 'alum,' its various hydrated forms are stable and possess a high charge density, making it an excellent choice for clarifying turbid waters, reducing phosphorus content, and controlling algal blooms. It is an essential component across numerous industrial sectors due to its cost-effectiveness and broad applicability.
Applications
Aluminum sulfate is chiefly employed in water purification as a primary coagulant for removing suspended particles, organic matter, and phosphorus. In municipal and industrial wastewater treatment, it aids in clarifying effluents. The paper industry utilizes it as a sizing agent to improve paper strength and reduce ink penetration, and also in pH control. It finds application in the tanning industry as a mordant for dyes, in gardening to adjust soil pH for acid-loving plants, and in construction as a waterproofing agent and accelerator for concrete. Other uses include pharmaceuticals, textiles, and as a flocculant in industrial processes.
Storage & Handling
Store in a cool, dry, well-ventilated area, away from incompatible materials. Keep containers tightly closed. Avoid direct contact with skin and eyes. Use appropriate personal protective equipment during handling. Protect from moisture to prevent caking and corrosion of metal containers.
Warning
- H319 Causes serious eye irritation
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