研究了沉淀母液中残余铜的除去方法，使之再生，可回用于碱性蚀刻液的生产。

Researches on the removal methods of remaining copper in the mother liquor are conducted, making it rise again and utilizing it.

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重金属废液处理（电镀废液、蚀刻废液等重金属回收及废水回用）。

For example, recycle the heavy metal from the electroplating wastewater and etching waste. And reuse Wastewater.

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