Polyaluminum chloride is one of the flocculants widely used in water treatment and purification, especially in drinking water treatment and tap water treatment. Drinking water and tap water are related to the safety of water for residents. Everyone will have questions. Is polyaluminum chloride toxic? Is the tap water treated with polyaluminum chloride harmful to human health?
Polyaluminum chloride, also known as PAC or water purifying agent, is a kind of inorganic polymer flocculant and a water-soluble polymer between ALCL3 and AL (OH) 3. The agent itself has a certain toxicity, because the aluminum oxide contained in PAC plays the most important role in water purification. In the process of hydrolysis, strong adsorption bridging effect occurs, thus forming the physical and chemical reactions of adsorption, coagulation, flocculation and precipitation. Aluminum oxide is harmful to human body, and direct and long-term contact is definitely undesirable.
However, when used for water purification, the PAC used is the drinking water grade product specified in the national standard. The content of aluminum oxide reaches 30%, the appearance is golden, and the content of water-insoluble matter and other heavy metals are lower than the national standard. During treatment and purification, the drinking water agent polyaluminum chloride is dissolved into liquid. Through a series of adsorption and precipitation reactions, the impurities in the water are removed while the components in the PAC are also precipitated. At the same time, in the process of water treatment, activated carbon, filter materials, etc. shall be used for full filtration, and disinfection and other processes shall be carried out. Basically, the residues in polyaluminum chloride have been removed, and the discharged water contains few components, which are negligible and harmless to human health. Therefore, polyaluminum chloride is harmless to human body and can be relieved.
Through the above explanation, I hope to dispel my concern about 'Is polyaluminum chloride toxic?'. However, the premise is to use products that meet the national standard, whether the effective content, water insoluble substances or other heavy metal impurities, all meet the national standard or above. It is through strict testing that we can enter thousands of households, and we can rest assured.
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