Zinc recovery from Zn(OH)₂ waste sludge with use of spent ammonium chloride electrolyte

• Autorzy: Stefanowicz T. , Napieralska-Zagozda S. , Osińska M.
• Języki publikacji: EN

Abstrakty

EN

Zinc recovery from Zn(OH)2 waste sludge was investigated by using the spent ammonium chloride electrolyte with anodes of platinum, lead, titanium and graphite. Trials with platinum and with graphite anodes evidenced that zinc electrowinning can be performed successfully with nearly theoretical current efficiency i1- electrol)'te is stirred continuously and replenished with Zn(OH)2 sludge initiall)' dried and ground. Powdered sludge should be added subsequently in small batches in order to maintain pH within the range of 5.0-5.5. In case of graphite anodes they should be enclosed in fabric bags to avoid sponge deposits on cathodes. The deposited zinc was of 99.3% purity. Anodes of titanium and lead occured to be unsuitable the fIrst due to excessive solubility and the second one due to passivation.

Słowa kluczowe

EN

zinc; recovery; waste sludge; electrolyte

PL

cynk; odzyskiwanie; osady ściekowe; chlorek amonu; elektrolit

• Wydawca: Centrum Materiałów Polimerowych i Węglowych PAN
• Czasopismo: Polish Journal of Applied Chemistry
• Rocznik: 1998
• Tom: Vol. 42, nr 3-4
• Strony: 187--198
• Opis fizyczny: Bbibliogr. 8 poz.

Twórcy

autor

Stefanowicz T.

• Institute of Chemistry and Technical Electrochemistry, Poznań University of Technology, Poznań, Poland, Fax: +(48 61) 8313359

autor

Napieralska-Zagozda S.

• Institute of Chemistry and Technical Electrochemistry, Poznań University of Technology, Poznań, Poland, Fax: +(48 61) 8313359

autor

Osińska M.

• Institute of Chemistry and Technical Electrochemistry, Poznań University of Technology, Poznań, Poland, Fax: +(48 61) 8313359

Bibliografia

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