Journal of The Surface Finishing Society of Japan
Online ISSN : 1884-3409
Print ISSN : 0915-1869
ISSN-L : 0915-1869
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Volume 60, Issue 6
Displaying 1-8 of 8 articles from this issue
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Special Feature / Surface Finishing by Atmospheric - pressure Plasma
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Research Papers
  • Selective Sulfidation of Copper, Zinc and Nickel Ions in Simulated Plating Wastewater with Calcium Sulfide and Filtration Characteristics of Metal Sulfide Slurry Formed
    Katsuhide SOYA, Dalibor KUCHAR, Mitsuhiro KUBOTA, Hitoki MATSUDA, Tada ...
    2009 Volume 60 Issue 6 Pages 405
    Published: June 01, 2009
    Released on J-STAGE: December 03, 2009
    DOIhttps://doi.org/10.4139/sfj.60.405
    JOURNAL FREE ACCESS
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    Sulfidatiosn treatment of a mixed metal solution containing Cu2+, Zn2+, and Ni2+ ions was conducted using CaS as the sulfidation agent. The selective recovery of these metal sulfides was studied. Furthermore, filtration characteristics of the NiS cake obtained with CaS, Na2S, and NaOH as precipitation agents were compared in terms of their average specific filtration resistance and compressibility coefficient. Results show that selective precipitation of metal sulfides was achieved by sulfidation treatment with CaS at pH of 1.8-2.0 for CuS precipitation and at pH of 5.5-6.0 for ZnS precipitation. Based on the high performance of filtration of the resultant nickel sulfides, it was concluded that solid CaS was more effective for filtration of NiS cake than Na2S or NaOH as a precipitation agent because NiSO4 was sulfidated with solid CaS, thereby forming larger NiS particles by agglomeration.
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