Polyaluminum chloride (PAC) and polyacrylamide (PAM) are two commonly used chemicals in the fields of water and wastewater treatment, with different uses and characteristics.
Chemical properties:
Polyaluminum chloride (PAC): PAC is an inorganic polymer coagulant, mainly composed of aluminum hydroxide. It has strong flocculation and sedimentation ability, which can quickly coagulate suspended substances, form larger flocs, and facilitate sedimentation or filtration.
Polyacrylamide (PAM): PAM is an organic polymer with strong water absorption and dispersibility. In water treatment, non ionic, cationic, or anionic PAMs are commonly used, depending on the water quality and treatment objectives.
Usage:
Polyaluminum chloride (PAC): mainly used as a coagulant in the field of water treatment. It can quickly coagulate suspended substances to form larger flocs, facilitating subsequent sedimentation or filtration. PAC is widely used in purifying tap water, treating industrial wastewater, and urban sewage.
Polyacrylamide (PAM): mainly used as an auxiliary agent and polymerization inhibitor for flocculants. It can be used in combination with flocculants such as PAC to enhance the flocculation effect and play a role in dispersing suspended substances in water treatment. In addition, PAM is often used in fields such as soil improvement and oilfield development.
Working principle:
Polyaluminum chloride (PAC): PAC coagulates suspended substances in water into larger flocs, allowing them to settle quickly or be filtered out, thereby achieving the goal of water quality purification.
Polyacrylamide (PAM): PAM enhances the stability of the floc and improves the flocculation effect through the adsorption and dispersion of its polymer chains. In soil improvement, PAM can improve soil structure and enhance soil water and fertilizer retention capacity.
Overall, PAC and PAM are often used in combination in water treatment, complementing each other to achieve better water quality treatment results.
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