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  • Title: Recycling of Cu powder from industrial sludge by combined acid leaching, chemical exchange and ferrite process.
    Author: Tu YJ, Chang CK, You CF, Lou JC.
    Journal: J Hazard Mater; 2010 Sep 15; 181(1-3):981-5. PubMed ID: 20638967.
    Abstract:
    A method in combination of acid leaching, chemical exchange and ferrite process was applied to recycle copper and confer higher chemical stability to the sludge generated from etching process in printed circuit board industry. Ninety-five percent copper could be recycled in the form of powder from the sludge. Moreover, not only the wastewater after chemical exchange can be treated to fulfill the effluent standard, but also the sludge can satisfy the toxicity characteristic leaching procedure (TCLP) limits made by Taiwan's environmental protection administration.
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