Novel composite decolorizing coagulant, preparation method and decolorizing method thereof

The invention belongs to the field of waste water disposal, and discloses a novel composite decolorizing coagulant, a preparation method and a decolorizing method thereof. The novel composite decolorizing coagulant is prepared from ferrous sulfate, cyanoguanidine, NaClO3, urea, ammonium sulfate, magnesium chloride, (methyl, acet, propyl, n-butyl) aldehyde, and de-ionized water through polymerization reaction at proportion; the mass ratio is 1: 0.02-3.0: 0.02-1.5: 0.002-0.8: 0.2-4.5: 0.02-0.5: 0.4-4.0: 0.2-2.5; the novel composite decolorizing coagulant is prepared by adding cyanoguanidine, NaClO3, urea, ammonium sulfate, magnesium chloride, (methyl, acet, propyl, n-butyl) aldehyde during the polymerization of ferrous sulfate and NaClO3, rising temperature to about 70 DEG C and aging the components. The preparation method of the novel composite decolorizing coagulant is simple in operation and convenient to use; the novel composite decolorizing coagulant cannot cause secondary pollution to environment, is good