Polyaluminium chloride (solid) is an environmentally friendly choice for efficient water purification and multifunctional applications
Publish Time: 2025-05-29
As a new type of high-efficiency inorganic polymer flocculant, polyaluminium chloride (PAC) has become an indispensable and important material in the field of water treatment due to its excellent water purification performance and wide range of applications. It is presented in the form of yellow powder and is an intermediate hydrolysis product between aluminum chloride and aluminum hydroxide. It has a higher molecular weight and stronger adsorption and bridging ability than traditional inorganic flocculants, so it shows excellent flocculation and precipitation effects in various water treatments.In the water purification process, polyaluminium chloride shows strong adaptability and high efficiency. Whether facing high-turbidity water sources, low-temperature and low-turbidity water or industrial wastewater with complex components, it can quickly form large, dense, heavy alum flowers, accelerate sedimentation speed, shorten sedimentation time, and thus improve overall treatment efficiency. It is applicable to a wide range of pH values, usually between 5 and 9, and can play a good role, especially suitable for natural water source conditions in most parts of my country. The treated effluent has low turbidity, small chromaticity, and excellent filtration performance, which helps to shorten the subsequent filtration cycle and reduce operating costs.In addition, polyaluminium chloride has a high content of alumina, and a small unit dosage can achieve an ideal purification effect, which not only improves the utilization rate of the agent, but also effectively reduces the comprehensive cost of water treatment. Compared with traditional agents such as aluminum sulfate or ferric chloride, polyaluminium chloride is less corrosive, and the erosion effect on the water pipeline system is significantly reduced, which is conducive to extending the service life of equipment and reducing the maintenance frequency. At the same time, its physical state is solid powder, which is convenient for storage, transportation and on-site use. It will not fail even in a humid environment, ensuring the continuity and stability of use.In addition to its wide application in domestic water and sewage treatment, polyaluminium chloride also has multiple functional characteristics, such as deodorization, decolorization, removal of heavy metal ions, radioactive pollutants, fluorine, phenol, oil pollution and other harmful substances. Therefore, it is widely used in the wastewater treatment links of mines, oil field reinjection water, papermaking, metallurgy, coal washing, leather, chemical industry and other industries. For example, it can be used as a sizing agent to improve paper strength in the papermaking industry; it can be used as a decolorizing agent to improve the quality of discharged water in the printing and dyeing industry; it can be used as an accelerator or adhesive in cement, casting, refractory materials and other fields; it even plays an important auxiliary role in food processing, medicine and cosmetics industries.In summary, polyaluminium chloride (solid) has become an indispensable key material in modern water treatment and industrial production with its efficient water purification ability, wide applicability, good economy and environmentally friendly characteristics. With the increasingly stringent national environmental protection requirements and the increasing attention paid to the recycling of water resources in various industries, the application prospects of polyaluminium chloride will be broader and continue to help achieve the goal of green and sustainable development.
