高濃度含銅廢水資材化處理技術之探討

本處理技術在提供一種高濃度含銅廢水資材化處理方法，主要是將高濃度含銅重金屬廢水加入鹼性浸漬槽中進行攪拌，適當添加氯化鐵並控制三價鐵離子與銅離子之莫耳比以及維持溶液pH值在高鹼環境下，進行第一階段礦化反應。待反應完成後，再適當地添加氯化亞鐵並控制二價鐵離子與銅離子之莫耳比並維持溶液初始pH值仍在高鹼環境下，進行第二階段磁化反應，待反應完成後，可利用磁性分選進行固液分離；如此，不僅濾液中銅與其他重金屬離子濃度能符合放流水排放標準，且固體物中銅與其他重金屬離子溶出濃度也符合TCLP毒性特性溶出試驗標準，降低業者處理負荷及對於環境的危害；此外，由於固體產物具有磁性及銅金屬離子均勻分佈特性可作為磁性材料、塗（顏）料、觸媒與吸收劑等資材化應用。

關鍵字

資材化；高濃度含銅廢水；礦化；磁化；磁性材料

並列摘要

The purpose of this treatment process is to provide a reclaiming method for treating high copper concentration wastewater. In the first stage of mineralization, the wastewater is added into a tank with sodium hydroxide solution followed by the addition of Fe^(3+) ion and heated to 70℃. The molar ratio between Fe^(3+) and Mt^(2+) ion is maintained and the pH value of solution is controlled in a strongly alkaline environment. In the inverse mixing method (adding high copper containing wastewater to sodium hydroxide solution), the precipitation process was carried out in an alkaline solution with pH value greater than 12.5, which resulted in simultaneous precipitation of Fe^(3+), Cu^(2+), Ni^(2+) and Zn^(2+) ions. The reaction of the first stage is complete when the ORP reading remains constant. In the second stage of magnetization reaction, the formation of magnetic ferrite, Fe^(2+) ion is added to the solution accompanied while being heated and aerated. Magnetic separation is used for the solid-liquid separation. Results show that the concentration of copper and heavy mineral ions of the effluent is well below the regulatory standards and the solid products meet the TCLP test standards of EPA. The solid products are magnetic and have the characteristic of evenly distributed copper ions, which can be recycled and applied as pigments, catalysts and adsorbents for exhausted gases.

並列關鍵字

materialization ； high copper containing wastewater ； mineralization ； magnetization ； magnetic material

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