FIELD: chemistry.
SUBSTANCE: method for precipitation of chromium (VI) ions from solutions includes interaction of chromium (VI) ions with reagent-reducer in acidic medium and the following addition of precipitator. As reagent-reducer oxalic acid is applied. Precipitation is carried out with chlorides of alkali-earth metals or magnesium chloride after preliminary addition of sodium carbonate.
EFFECT: invention makes it possible to reduce duration of precipitation of chromium cations, increase ecological safety of precipitation process due to application of non-volatile reducer.
2 cl, 1 tbl, 22 ex
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