What are the colors and forms of polyaluminium chloride, and do they affect the effect of use?
Publish Time: 2025-04-03
As an efficient water treatment chemical, polyaluminium chloride (PAC) often attracts people's attention for its diversity of colors and forms. From light yellow to dark brown, from powder to granules, polyaluminium chloride shows its rich appearance characteristics. However, will these differences in color and form affect its use effect? The answer is no. The color and form of polyaluminium chloride are diverse, but they do not affect its high efficiency in water treatment.The color of polyaluminium chloride mainly comes from the raw materials, processes and later treatments in its production process. Different production processes and raw material ratios will lead to differences in product color. For example, polyaluminium chloride produced by plate and frame filter pressing with calcium aluminate powder and hydrochloric acid as raw materials is usually yellow or light yellow; while polyaluminium chloride produced by spray drying tower with aluminum hydroxide powder and hydrochloric acid as raw materials may be white or milky white. In addition, the color of polyaluminium chloride may also be affected by storage time and environmental conditions. For example, long-term exposure to air may cause the color to deepen.Polyaluminium chloride also shows diversity in form. Depending on the production method and application, polyaluminium chloride can be in powder, granular or liquid form. Powdered polyaluminium chloride usually has high activity and is easy to dissolve and disperse in water; granular polyaluminium chloride is more suitable for automated dosing systems, which is convenient for metering and control; liquid polyaluminium chloride has higher concentration and stability and is suitable for special water treatment needs.Although there are differences in the color and form of polyaluminium chloride, these differences do not significantly affect its use in water treatment. The main function of polyaluminium chloride is to form colloids through hydrolysis and polymerization reactions. These colloids have strong adsorption and flocculation capabilities and can effectively remove impurities such as suspended matter, organic matter, and heavy metal ions in water. Regardless of the color and form of polyaluminium chloride, as long as its quality meets the relevant standards, it can play an excellent role in water treatment.Of course, the difference in color and form may affect the dissolution rate and solubility of polyaluminium chloride to a certain extent. For example, white or milky spray-dried polyaluminium chloride usually has a faster dissolution rate and higher solubility, which is conducive to forming a large amount of colloid in a short time and improving water treatment efficiency. But this does not mean that polyaluminium chloride of other colors and forms cannot be used or has poor effects. In practical applications, users can choose suitable polyaluminium chloride products according to their own needs and conditions.In summary, polyaluminium chloride has various colors and forms without affecting its use effect. When choosing polyaluminium chloride products, users should pay more attention to its quality indicators, performance indicators and actual application effects, rather than just judging based on color and form. Only in this way can we ensure the best treatment effect and economic benefits in the water treatment process.
