METHOD OF REMOVING HEAVY METAL IONS FROM SEWAGE

METHOD OF REMOVING HEAVY METAL IONS FROM SEWAGE

FIELD: purification of industrial sewage by flotation, more particularly removed of ions of toxic metals such as chromium, copper, iron, nickel, and zinc from water. SUBSTANCE: method comprises one-stage flotation purification at pH of 7.5-8.0, and flotation agent is mixture of higher carboxylic aci...

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Bibliographische Detailangaben
Hauptverfasser: ZUBAREVA G.I, RADUSHEV A.V, ADEEV S.M, TETERINA N.N
Format: Patent
Sprache:eng
Schlagworte:
CHEMISTRY
METALLURGY
TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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Beschreibung
Zusammenfassung:FIELD: purification of industrial sewage by flotation, more particularly removed of ions of toxic metals such as chromium, copper, iron, nickel, and zinc from water. SUBSTANCE: method comprises one-stage flotation purification at pH of 7.5-8.0, and flotation agent is mixture of higher carboxylic acid hydrazides of general formula CnH2n+1CONHNH2, wherein n is 6-8. Said mixture which is 0.5% aqueous emulsion prepared with addition of hydrochloric acid in equimolar ratio is added to sewage. EFFECT: simplified process flowsheet, higher process rate and shorter (up to 5 min) flotation time. 3 ex, 2 tbl