Towards a sludgeless heavy metal finishing industry for a cleaner environment

The treatment of heavy metals is based primarily on chemical coagulation and precipitation where substantial amounts of toxic sludge are normally generated. A study using an electrolytic processes has been carried out to recover heavy metals from a mixed plating bath in a metal finishing factory. Th...

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Bibliographic Details
Published in:Desalination 1996, Vol.106 (1), p.411-413
Main Authors: Hamid, Noor Hisham Ab, Idris, Azni
Format: Article
Language:English
Subjects:
Applied sciences
Electrolysis
Exact sciences and technology
Heavy metal
High surface area cathode
Other industrial wastes. Sewage sludge
Pollution
Sludgeless
Wastes
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Summary:The treatment of heavy metals is based primarily on chemical coagulation and precipitation where substantial amounts of toxic sludge are normally generated. A study using an electrolytic processes has been carried out to recover heavy metals from a mixed plating bath in a metal finishing factory. The unit uses a RETEC system consisting of a high surface area cell based on a simple theory of electrolysis and produces a very large surface area about 10–15 times the geometrical surface area of the cathode. This paper presents cases where 95% tin, lead, and 98% copper, nickel, and zinc were successfully recovered, and discusses economic considerations.
ISSN:0011-9164
1873-4464
DOI:10.1016/S0011-9164(96)00137-3