Polyaluminium chloride (PAC) is an inorganic substance, a new water purification material, and an inorganic polymer coagulant, referred to as polyaluminium.It i...
Polyaluminium chloride (PAC) is an inorganic substance, a new water purification material, and an inorganic polymer coagulant, referred to as polyaluminium.It is a water-soluble inorganic polymer between AlCl3 and Al(OH)3, with the chemical formula [Al2(OH)nCl6-n]m, where m represents the degree of polymerization and n represents the degree of neutrality of the PAC product.n=1~5 is a high-charge polymeric ring chain with a Keggin structure, which has a high degree of electrical neutralization and bridging effect on colloids and particulate matter in water, and can strongly remove micro-toxic substances and heavy metal ions, with stable properties.The inspection method can be inspected according to the national standard GB 15892--2003.Due to the bridging effect of hydroxide ions and the polymerization effect of multivalent anions, the produced polyaluminium chloride is an inorganic polymer water treatment agent with relatively high molecular weight and high charge.
The color is yellow or light yellow, dark brown, and dark gray resinous solid.This product has strong bridging adsorption properties, and during the hydrolysis process, physical and chemical processes such as coagulation, adsorption, and precipitation occur.The fundamental difference between polyaluminium chloride and traditional inorganic coagulants is that traditional inorganic coagulants are low molecular crystalline salts, while the structure of polyaluminium chloride consists of polycarboxylate complexes with variable morphology. It has fast flocculation and precipitation speed, wide applicable pH range, no corrosiveness to pipeline equipment, and obvious water purification effect. It can effectively remove color and quality SS, COD, BOD, and heavy metal ions such as arsenic and mercury in water. This product is widely used in drinking water, industrial water, and sewage treatment fields.
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