Coagulants are chemicals that help in the removal of suspended solids. They work by neutralizing the negative charges on particles suspended in water, causing them to clump together. This process, known as coagulation, is crucial in municipal water treatment plants where reducing turbidity is vital. Common coagulants include aluminum sulfate (alum) and ferric chloride. These materials not only assist in particle removal but also help in the subsequent process of sedimentation, where larger clumps of particles settle at the bottom for easy removal.
Moreover, PAM helps in improving water retention in soils, allowing for better moisture management during periods of drought. This is especially beneficial in arid and semi-arid regions where water availability is a critical concern. The increased efficiency in water usage not only boosts crop yields but also supports sustainable farming practices, thereby contributing to food security.