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.
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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