Does polyaluminum chloride hydrolysis affect kaolin coagulation performance?

The effects of polyaluminum chloride (PACl) hydrolysis prior to coagulation on both the coagulation zone and coagulation performance of a kaolin suspension were investigated by a novel jar test named the “reversed coagulation test”.

Does PACL hydrolysis increase turbidity during charge neutralization coagulation?

Conclusions PACl hydrolysis prior to coagulation caused an increase in the optimal dosage for charge neutralization coagulation and sweep coagulation, and also induced an increase in the residual turbidity of a kaolin suspension during charge neutralization coagulation.

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 .

Does polymeric aluminum chloride coagulate efficiently?

Taking the more widely used polymeric aluminum chloride (PACl) as an example, coagulation efficiency is closely related to the characteristics and distribution of Al species of PACl (He et al. 2024).

Can PACL hydrolysis be adapted under different operating conditions?

Based on the forcing hydrolysis characteristics of fine bubbles due to the adsorption of hydroxide ions on their surfaces, this study verified the adaptability of the forced PACl hydrolysis by fine bubbles under different operating conditions objectively and comprehensively.

What is hydrolysis before coagulation?

In practice, hydrolysis prior to coagulation usually occurs in water and wastewater treatment engineering, such as during the process of preparing a PACl stock solution before coagulation or in the case of an insufficient dispersion of PACl during the rapid mixing period.