FIELD: chemistry.
SUBSTANCE: invention can be used in mutual treatment of spent solutions from factories having chromium-containing waste water and waste water containing antibiotic production wastes. The method is carried out by adding sulphuric acid to chromium-containing spent solutions in a process vessel to pH 1-2, the reducing Cr(VI) to Cr(III) using waste water contaminated with antibiotic production wastes which contain butyl acetate and off-grade drugs - antibiotics ampicillin, oxacillin, cefazolin. The reduction process is carried out at temperature not below 30°C and not higher than 60°C with reactant reaction time of at least 10 minutes. Complete reduction is checked with a potentiometer method.
EFFECT: method reduces concentration of hexavalent chromium in spent solutions to maximum allowable concentration values or lower when recycling large amounts of waste water.
2 dwg, 1 tbl
| Title | Year | Author | Number |
|---|---|---|---|
| PROCESSING METHOD OF CORROSION INHIBITOR CONTAINING COMPOUNDS OF HEXAVALENT CHROMIUM AND SEA WATER | 2019 |
|
RU2731269C1 |
| METHOD FOR PROCESSING OF EXHAUSTED SOLUTIONS COMPRISING COMPOUNDS OF HEXAVALENT CHROMIUM | 1996 |
|
RU2110486C1 |
| METHOD FOR REDUCTION OF CHROMIUM(+6) IN SPENT SOLUTIONS | 2015 |
|
RU2602862C1 |
| METHOD OF PURIFYING WATER FROM CHROMIUM COMPOUNDS | 2010 |
|
RU2458010C2 |
| METHOD OF EXTRACTING CHROMIUM (VI) FROM SOLUTIONS TO OBTAIN IRON-CHROMIUM PRECIPITATE | 2017 |
|
RU2698810C2 |
| METHOD FOR RECOVERY OF CHROMIUM (+6) IN LIQUID WASTE OF ELECTROPLATING INDUSTRY | 2017 |
|
RU2675016C1 |
| METHOD OF DETOXICATION OF ACID SEWAGE FROM HEXAVALENT CHROME COMPOUNDS | 1993 |
|
RU2042646C1 |
| METHOD OF COMPLEX PROCESSING OF WASTEWATER GALVANIC PRODUCTION | 2018 |
|
RU2674206C1 |
| METHOD FOR REGENERATION OF WASTE ELECTROLYTES FOR POLISHING AND ETCHING CHROME-CONTAINING STEELS | 2000 |
|
RU2175025C1 |
| SORBENT FOR PURIFYING WASTE WATER FROM CHROMIUM (VI) | 2015 |
|
RU2596744C1 |
