What are the effects of using polyaluminum chloride and polyacrylamide to treat mine water?

‌ 

The use of Polyaluminum chloride(PAC) and Polyacrylamide(PAM) to treat mine water mainly targets suspended solids that are difficult to naturally settle in mine water, such as coal powder and tiny rock debris. These suspended solids are difficult to remove naturally due to their small particle size. During the processing, the coagulation precipitation method combined with appropriate coagulants is a key step.

Ⅰ. Principles and Applications of Coagulation

Coagulation is an important method in water treatment, suitable for removing suspended particles, colloidal impurities, total phosphorus, and algae from natural water and wastewater. Coagulants, through mechanisms such as compression double-layer, adsorption neutralization, and adsorption bridging, make originally stable colloidal particles unstable and aggregate into larger particles, which are easy to remove through precipitation or filtration.

Ⅱ.The interaction between polyaluminum chloride (PAC) and polyacrylamide (PAM)

1.Polyaluminum chloride(PAC): As a commonly used inorganic coagulant, PAC still exhibits good coagulation effect at low temperatures and is particularly suitable for use in northern regions. PAC can effectively neutralize the charge of suspended particles, promote agglomeration between particles, and form larger alum flowers.

Ⅲ. Processing flow and effectiveness

Mine water treatment usually adopts the "coagulation sedimentation filtration" process. In this process, the combination of PAC and PAM can significantly remove suspended solids in mine water, including large and fine particles. After coagulation reaction, the suspended solids form larger alum flowers and precipitate, achieving solid-liquid separation. Subsequently, residual suspended solids are further removed through filtration (such as using smokeless coal and quartz sand as filter materials) to achieve industrial water standards in the effluent.

Ⅳ.Optimize conditions and improve effectiveness

The coagulation effect is influenced by various factors, including coagulant type, dosage, water quality, hydraulic conditions, water temperature, alkalinity, and pH value. By optimizing these conditions, the coagulation effect can be further improved to ensure that the effluent quality meets specific requirements.

Ⅴ.Special Needs and Handling

If the treated mine water is used as drinking water, it is also necessary to consider removing organic pollutants from the water. At this point, an adsorption step can be added to the "coagulation sedimentation filtration" process, using adsorbents such as activated carbon to remove organic pollutants and ensure water quality safety.

Ⅵ.conclusion

In summary, the use of Polyaluminum chloride and Polyacrylamide to treat mine water, through a coagulation sedimentation filtration process, can efficiently remove suspended solids in mine water, making the effluent meet industrial water standards. At the same time, based on specific water quality and treatment needs, the treatment process and conditions can be further optimized to improve treatment efficiency. Yuxin Environmental Chemical and other professional chemical enterprises have rich experience and advanced technology in this field, which can provide comprehensive and efficient solutions for mine water treatment.