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[Physical and chemical properties] Polychlorinated aluminum ferric sulfate, a dark red-brown transparent liquid, with a density (20°C) of 1.
Polychlorinated aluminum ferric sulfate is composed of polynuclear polyiron and polyaluminum complex inorganic polymer coordinated with chloride ions and sulfate radicals.
[Preparation]
(1) PAFCS is refined by using alum slurry, pressurized acid to dissolve Al 2 O 3 and Fe 2 O 3 , after adjusting the degree of alkalinity and polymerization
(2) Zhang Congliang et al.
Table 2-3 Chemical composition of pyrite slag
First, with the appropriate proportion of sulfuric acid and hydrochloric acid mixed acid leach pyrite cinder comminuted, heated to a reflux temperature under stirring, the reaction time can be obtained containing certain of Al 3+ , of Fe 3+ , and of Fe 2+ solution
[Technical Index]
[Application] In use, it was found that PAFCS has the advantages of better turbidity removal performance, larger flocs formed, and faster settling speed than PAC
In addition, PAFCS has strong adsorption and regeneration capabilities
Generally, the pH range of PAC adapts to raw water is 6-9, while the effective pH range of PAFCS can reach 3.
What's more important is that the impurities brought in by the medicine and the aluminum left after treatment are greatly reduced, which is very important to improve the quality of drinking water and ensure human health