FIELD: chemistry.
SUBSTANCE: coagulant is prepared by adding an iron compound to an aqueous aluminium hydroxychloride solution, where the iron compound used is iron oxide powder Fe3O4 with particle size 20-100 nm in concentration of 0.1-1.0 % of the weight of the aqueous solution of coagulant.
EFFECT: high efficiency of the process of coagulating impurities in water, where the coagulation time is almost half and the degree of purity of water increases.
1 dwg, 1 tbl, 2 ex
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