FIELD: chemical detoxification methods.
SUBSTANCE: invention relates to methods for chemical detoxification of stored for long time (at least two years) galvanic production effluent sediments and can be used in mechanical and instrumentation engineering as well as in electronic industry. In the beginning of process, galvanic sludges are activated with sulfuric acid solution, pH 3.8-4.0, for 15-20 min, after which, ferritized galvanic sludge, ferrous sulfate, and alkali to pH 9-10 are added at stirring and heating. Ferritizing process is performed for 25-30 min while maintaining temperature of reaction mixture heating to 50-60°C.
EFFECT: enabled detoxification of long-term galvanic sludges and reduced detoxification expenses.
1 dwg, 3 tbl
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