Copper and polymerized ferric sulphate were prepared by using scrap iron coils to react with acid wastewater containing copper ion.

利用废铁卷与含铜酸性废水作用制备金属铜和聚合硫酸铁，并用聚合硫酸铁作絮凝剂处理酯化废水。

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For pretty much the minimum international order of copper containing scrap is the short container, or 20 tonnes of material.

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