FIELD: chemistry.
SUBSTANCE: invention can be used to remove heavy metal ions from industrial waste water. In the method of purifying waste water from heavy metal ions by sorption on a solid insoluble natural sorbent, the natural sorbent used is shale with biotite content of at least 25%, with sorbent grain size of 2.50-3.00 mm.
EFFECT: high rate of filtration when purifying waste water, which results in shorter purification time and low sorbent consumption, resulting in cost-effectiveness.
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