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sulfate gold ammonia plating waste solution

     

Sulfate Gold Ammonia Plating Waste Solution Utilizes pH Adjustment Technique for Gold Recovery:

The sulfide gold ammonia ion complex [Au¹(NH₃)₂(SO₃)₂]³⁻ is stable at a pH of 8~9 in solution and can be employed for electroplating gold. When the pH decreases, it decomposes into gold ions, sulfide ions, and ammonia; the sulfide ions facilitate the reduction of gold ions to metallic gold.

This method employs sulfuric acid adjustment to lower the pH to 2~3, thereby reducing gold into gold powder, which is subsequently filtered and washed for recovery.

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