What is the primary purpose of using aluminum salts in water treatment?

The primary purpose of using aluminum salts in water treatment is to clarify water. Aluminum salts, such as aluminum sulfate, are commonly used as coagulants in the water purification process. When added to water, these salts cause small particles, colloids, and impurities to clump together into larger particles, a process known as coagulation. This clumping makes it easier to remove these impurities through subsequent filtration and sedimentation processes, resulting in cleaner and clearer water.

In water treatment facilities, the effective clarification of water is crucial because it not only improves aesthetic qualities but also reduces the load on disinfection processes, helping to ensure that harmful microorganisms are properly eliminated. This is particularly important in producing safe drinking water and meeting regulatory standards for water quality.