FIELD: chemistry.
SUBSTANCE: invention relates to purification of natural and waste water from industrial enterprises from sulphides. Method of purifying waste water from sulphides involves reacting a complex of iron with ethylenediaminetetraacetate and a stabilizer with water containing sulphide ions. Stabilizer used is nitrilotrimethylene phosphonic acid in amount of 0.01–0.1% of the weight of the absorption solution.
EFFECT: reduced specific consumption of complexing agent - ethylenediamineteraacetate per gram of formed sulfur and reduced corrosion of equipment.
1 cl, 2 dwg, 1 tbl
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