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PAC coagulant for water treatment.

The Role of Polyaluminum Chloride Coagulant in Water Treatment Introduction Water treatment is a critical process that ensures the supply of clean and safe water for human consumption and industrial use. One of the key components used in water treatment is polyaluminum chloride (PAC), which acts as a coagulant. This article aims to discuss the role of PAC in water treatment and its various applications. What is Polyaluminum Chloride? Polyaluminum chloride is a type of inorganic polymer compound that is widely used as a coagulant in water treatment processes. It is a white or pale yellow granular solid that is soluble in water and can form a transparent gel at high concentrations. PAC is composed of aluminum ions and hydroxide ions, which are bonded together through covalent links. Mechanism of Action The primary function of PAC in water treatment is to coagulate suspended particles and colloids in water. When PAC is added to water, it dissociates into aluminum ions and hydroxide ions. These ions then react with the suspended particles and colloids, forming larger, heavier particles called flocs. These flocs settle to the bottom of the water treatment tank, allowing the treated water to be separated from the impurities. Advantages of Polyaluminum Chloride 1. High efficiency PAC has a high coagulation efficiency, which means it can effectively remove a wide range of contaminants from water, including suspended solids, algae, and heavy metals. 2. Low dosage Compared to other coagulants, PAC requires a lower dosage to achieve the desired level of water treatment. This makes it more cost-effective This makes it more cost-effective

This makes it more cost-effective This makes it more cost-effective

polyaluminum chloride coagulant. 3. Wide pH range PAC can be used in a wide pH range, making it suitable for treating water with varying pH levels. 4. Environmentally friendly PAC is biodegradable and non-toxic, making it an environmentally friendly alternative to other coagulants. Applications of Polyaluminum Chloride 1. Drinking water treatment PAC is commonly used in drinking water treatment plants to remove contaminants and ensure the safety of drinking water. 2. Industrial water treatment PAC is used in various industries, such as paper manufacturing, textile dyeing, and chemical production, to treat process water and prevent pollution. 3. Wastewater treatment PAC is used in wastewater treatment plants to remove pollutants and improve the quality of effluent before it is discharged into the environment. Conclusion In conclusion, polyaluminum chloride is a versatile and effective coagulant that plays a crucial role in water treatment processes. Its high efficiency, low dosage, wide pH range, and environmental friendliness make it a popular choice for water treatment applications. As the demand for clean and safe water continues to grow, the use of PAC in water treatment will likely increase in the future.

Poly Aluminum Chloride (PAC)