Why is polyaluminum chloride a good coagulant for water treatment?

Polyaluminum chloride (PAC) is highly effective coagulant for water treatment over conventional coagulants because of low dosage requirement, shorter flocculation time, smaller amount of sludge, high efficiency and low aluminum residual in treated water .

Which polyvalent ions enhance the performance of polyaluminum chloride in water treatment?

Polyvalent anions including sulfate and phosphate are known to enhance the performance of polyaluminum chloride in water treatment. The ions can be incorporated into the products of the present invention either before, during, or after the process of raising the basicity.

What is anionic polyacrylamide (PAM)?

Anionic polyacrylamide (PAM) possesses interconnected and active groups that establish robust bonds with the surface of suspended colloids, promoting the formation of coarse particles among the suspended solids and a mixture of insoluble particles in water (Irfan et al. 2017).

What is the most effective dosage for polyaluminum chloride (PAC) & aluminum sulfate (FEC?

The findings revealed that the most effective dosages for polyaluminum chloride (PAC), aluminum sulfate (Al 2 (SO 4) 3), and ferric chloride (FeCl 3) were 20, 10, and 20 mg/L, respectively.

Which ions stabilize polyaluminum chloride composition?

The aluminum salts also generally have some water of hydration associated with them. Calcium ions are known to stabilize polyaluminum chloride compositions. Said calcium ions may be introduced to products of the present invention by adding a variety of calcium salts.

What happens when Pam reacts with metal cations?

Under low pH conditions, anionic PAM molecules react with metal cations, forming insoluble metal complexes. Conversely, in alkaline conditions, the coagulant adsorbs organic matter within flocs created from metal hydroxides, facilitating settling (Kumar et al. 2010; El-Naas et al. 2010).