METHOD OF PURIFYING WASTE WATER FROM HEXALENT CHROMIUM COMPOUNDS

摘要

FIELD: chemistry.SUBSTANCE: method of purifying waste water from hexavalent chromium compounds includes reaction thereof with an iron-containing dispersant with simultaneous exposure to a magnetic field generated by an electromagnet to obtain an insoluble precipitate. The iron-containing dispersant used is ground iron or steel chips. Exposure is carried out using a controlled magnetic field, the direction of the intensity vector of which is varied by periodically changing the polarity of current in the electromagnet windings, and the intensity value is controlled by varying the value of current in the windings. A chromium hydroxide Cr(OH)precipitate is obtained by neutralising the unreacted mixture with an alkali.EFFECT: high degree of purity of waste water while cutting the duration of the process, easy implementation and high efficiency of the method.1 dwg, 2 ex