FIELD: water treatment. SUBSTANCE: invention is focused on treating plating waste water, rainfall effluents, and drinking water. Water to be purified is treated by reagent and then settled to separate sediment. As reagent, 3-10% aqueous suspension of alkylcarboxysiloxane mixture is used, compound being defined by a general formula 
where R is CHAB, CHAD, or ordinary bond; A and B are 
(x=0-16) or 
(y=0-16 and z=0-16) and D is 
. EFFECT: increased purification efficiency. 3 cl, 3 tbl
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