硫化水素を用いたCu, Zn, Ni混合めっき廃水の選択的硫化による金属硫化物の分離 Separation of Metal Sulfides from Plating Wastewater Containing Cu, Zn and Ni by Selective Sulfuration with Hydrogen Sulfide

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Experiments were conducted to investigate selective sulfuration of copper, zinc and nickel contained in a simulated plating wastewater using H<sub>2</sub>S as a sulfurating agent. The sulfuration of single solutions of copper, zinc and nickel, and mixed solutions of these metals with H<sub>2</sub>S was conducted in a bubble column reactor.<br>As a result, it was found that heavy metals can be selectively precipitated from the mixed-metal plating wastewater at a pH value of 1.5 for copper, 4.5 for zinc and 6.7±0.2 for nickel. The purities of precipitates based on total amount of metal contained were 95.5%, 87.4% and 94.7% in the case of copper, zinc and nickel, respectively. When the results were compared with those obtained for the selective precipitation with Na<sub>2</sub>S, it was found that higher purities of metal sulfides were achieved with H<sub>2</sub>S. It was considered that local increases of pH resulting from an addition of alkaline sulfurating agent of Na<sub>2</sub>S were avoided in the case of H<sub>2</sub>S. Consequently, an undesirable co-precipitation of zinc and nickel sulfides at a pH value of 1.5 corresponding to copper selective precipitation was reduced. Similarly, the precipitation of nickel sulfide was partially avoided during the precipitation of zinc sulfide at a pH value of 4.5.<br>

収録刊行物

  • 表面技術 = The Journal of the Surface Finishing Society of Japan  

    表面技術 = The Journal of the Surface Finishing Society of Japan 57(12), 901-906, 2006-12-01 

    The Surface Finishing Society of Japan

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各種コード

  • NII論文ID(NAID)
    10018791916
  • NII書誌ID(NCID)
    AN1005202X
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    09151869
  • NDL 記事登録ID
    8610580
  • NDL 雑誌分類
    ZP41(科学技術--金属工学・鉱山工学)
  • NDL 請求記号
    Z17-291
  • データ提供元
    CJP書誌  NDL  J-STAGE 
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