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Poly Aluminium Chloride

Poly Aluminium Chloride

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Poly Aluminium Chloride (PAC) is a chemical compound commonly used as a coagulant and flocculant in water treatment processes. It is produced by combining aluminum hydroxide with hydrochloric acid. PAC is widely recognized for its effectiveness in removing impurities and contaminants from water, making it suitable for various applications, including municipal water treatment, wastewater treatment, industrial processes, and swimming pool maintenance. Its ability to form strong flocs and remove suspended particles makes it an essential chemical in ensuring clean and safe water.


Q: What is Poly Aluminium Chloride (PAC)?
A: Poly Aluminium Chloride (PAC) is a chemical compound used as a coagulant and flocculant in water treatment. It is made by reacting aluminum hydroxide with hydrochloric acid to produce a polymeric aluminum complex.

Q: How does Poly Aluminium Chloride work in water treatment?
A: Poly Aluminium Chloride works by destabilizing suspended particles and contaminants in water. When added to water, it undergoes hydrolysis, releasing positively charged aluminum ions. These ions neutralize the negative charges on suspended particles, allowing them to come together and form larger flocs. The flocs then settle or can be easily filtered out, resulting in clearer and cleaner water.

Q: What are the advantages of using Poly Aluminium Chloride in water treatment?
A: Using Poly Aluminium Chloride offers several advantages in water treatment. Firstly, it effectively removes a wide range of impurities, including suspended solids, organic matter, and certain types of microorganisms. Secondly, PAC is more efficient than traditional coagulants like aluminum sulfate (alum), requiring smaller doses for effective treatment. Additionally, PAC has a lower pH compared to alum, reducing the need for pH adjustment during treatment.

Q: In which applications is Poly Aluminium Chloride used?
A: Poly Aluminium Chloride is used in various applications related to water treatment. It is commonly used in municipal water treatment plants to purify drinking water and remove turbidity, color, and odors. PAC is also used in wastewater treatment to clarify and remove pollutants before discharge. Furthermore, it finds applications in industrial processes, paper production, textile manufacturing, and swimming pool maintenance.
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