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)3 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
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD OF COMPLEX PROCESSING OF WASTEWATER GALVANIC PRODUCTION | 2018 |
|
RU2674206C1 |
| PROCESSING METHOD OF CORROSION INHIBITOR CONTAINING COMPOUNDS OF HEXAVALENT CHROMIUM AND SEA WATER | 2019 |
|
RU2731269C1 |
| METHOD OF EXTRACTING CHROMIUM (VI) FROM SOLUTIONS TO OBTAIN IRON-CHROMIUM PRECIPITATE | 2017 |
|
RU2698810C2 |
| METHOD FOR PROCESSING OF EXHAUSTED SOLUTIONS COMPRISING COMPOUNDS OF HEXAVALENT CHROMIUM | 1996 |
|
RU2110486C1 |
| METHOD OF RECYCLING SPENT SOLUTIONS CONTAINING HEXAVALENT CHROMIUM COMPOUNDS | 2012 |
|
RU2491232C1 |
| RECOVERY OF CHROMIUM-BEARING AND ETCHANT EFFLUENTS (VERSIONS) | 2013 |
|
RU2573531C2 |
| METHOD FOR DECONTAMINATION OF AQUEOUS SOLUTIONS CONTAINING COMPOUNDS OF HEXAVALENT CHROME | 2017 |
|
RU2678287C1 |
| SEWAGE WATER CLEANING APPARATUS | 1993 |
|
RU2029735C1 |
| METHOD FOR TREATING SEWAGE FROM IONS OF HEAVY METALS | 0 |
|
SU1761686A1 |
| METHOD FOR TREATMENT OF SEWAGE WATER TO REMOVE IONS OF HEAVY METALS | 1992 |
|
RU2061660C1 |
