Can polyaluminum chloride be used in water treatment?

In this study, synthesis and speciation of polyaluminum chloride (PAC) for application in water treatment was investigated using a colorimetric speciation method. It was possible to produce stable preparations of PAC solutions in which a relatively stable cationic polymer predominated.

What is a polyaluminium chloride?

PolyAC refers to polyaluminium chloride. 2c) = 3, with a >1.05. Some polyaluminium chlorides may not contain SO4 and conform to the formula [Al(OH)aClb]n, where (a b) = 3, with a >1.05 . Generally the basicity of these compounds used in the water treatment industry does not exceed 60% (see reference 1) or products.

What are the chemical requirements of polyaluminium chloride?

The chemical requirements of both forms of polyaluminium chloride are given below. Powdered PolyAC shall contain water-soluble aluminium of not less than 14 ± 0.3% w/w as Al, or 30% w/w as Al2O3. Liquid PolyAC shall contain water-soluble aluminium of not less than 2.16% w/w as Al or 10% w/w as Al2O3.

How much water soluble aluminium is in a liquid polyac?

Liquid PolyAC shall contain water-soluble aluminium of not less than 2.16% w/w as Al or 10% w/w as Al2O3. In liquid PolyAC, the water-insoluble matter shall not exceed 0.2% w/w. 2.3.1.1 The limits of specific impurities in the PolyAC shall be set by the purchaser.

What is poly aluminum chloride?

Poly aluminum chloride is a water purification material, inorganic polymer coagulant, also referred to as Poly aluminum, abbreviated as PAC, an inorganic polymer water treatment agent having a relatively large molecular weight and a relatively high charge is produced due to bridging action of hydroxide ions and polymerization of polyvalent anions.

Why does polyaluminium chloride contain more polymerised aluminium?

Controlled initial hydrolysis of aluminium salts occurring during the production of polyaluminium chloride causes that they contain more polymerised aluminium forms with a high positive charge than those generated during rapid and uncontrolled hydrolysis of aluminium sulphate (VI) [22, 23].