What is the performance of synthesized PAC compared with aluminum sulfate?

The performance of synthesized PAC compared with aluminum sulfate, aluminum chloride and commercial PAC for water treatment. 4. Conclusion The synthesis of PΑC results revealed that the low concentration of aluminum chloride favored to the formation of Αl b species of PΑC and the high concentration preferred to the formation of Αl c species of PΑC.

What is poly-aluminum-silicate-chloride (Pasic)?

A new inorganic polymer coagulant, poly-aluminum-silicate-chloride (PASiC), was prepared by two approaches: (1) hydroxylation of the mixture of AlCl 3 and fresh polysilicic acid in Al/Si ratios ≥5, (PASiCc); (2) hydroxylated poly-aluminum-chloride (PAC) combined with polysilicic acid aged 2 h in Al/Si ratios ≥5, (PASiCm).

Can aluminum chloride be used to make aluminum-silicate composite?

When aluminum chloride or PAC is used to produce the aluminum-silicate composite, there are two ways of designing the aluminum-silicate composite. If the silicate component is dominant and aluminum salts are added as a stabilizer to improve its retention after preparation, it is still a modified anionic inorganic polymer flocculant (PSiAC).

How does polysilicic acid react with aluminum?

The polysilicic acid can have combined with aluminum and its hydrolysis products by Al-O-Si bonds , to form hydroxyaluminosilicate species, which can retard the hydrolysis-polymerization of aluminum to some extent.

What happens when polysilicic acid and aluminum hydrolysis are combined?

The complexes formed when different charged hydrolyzed aluminum species and polysilicic acid are combined have a lower positive charge but a larger molecular weight than the corresponding aluminum hydrolysis product at same pH value.

What are the synthesis parameters of aluminum chloride hexahydrate?

The synthesis parameters were concentration of aluminum chloride hexahydrate (0.4 to 0.8 M), basicity ratio (2.0 to 2.4), reaction temperature (60 to 80 °C) and time (180 to 360 min). The performance of PΑC for water treatment was also investigated. The monomeric, medium polymeric and colloidal species of PAC were determined by Ferron test method.