Which two flocculant chemicals are commonly used to control turbidity on construction sites?

The choice of Anionic Polyacrylamide (PAM) and Aluminum Sulfate (Alum) as flocculant chemicals is well-founded due to their effectiveness in controlling turbidity, particularly at construction sites.

Anionic Polyacrylamide (PAM) is a synthetic polymer that helps in the aggregation of suspended particles, making them larger so they can settle faster in water. This process significantly reduces turbidity, which is crucial when managing runoff during construction activities. PAM is also noted for being environmentally friendly when used according to guidelines.

Aluminum Sulfate (Alum) serves as a coagulant, facilitating the chemical process where pollutants and sediments clump together and settle out of water. Alum’s ability to bind with particulates enhances sediment removal and turbidity reduction, making it a reliable choice in construction environments that require effective stormwater management.

Together, these two chemicals complement each other’s functions, making them a commonly employed duo for managing turbidity on construction sites. Their application ensures compliance with environmental regulations and helps protect water quality in nearby bodies of water.