The compounds which are commonly reused by recycling or are extracted/produced by reclamation arise from metal uses such as galvanizing or from metal products within pollution-control dusts or sludges.
通常通过再循环被再使用或通过直接利用被提取/生产的化合物来自金属用途，例如电镀，或来自污染控制粉尘或淤泥中的金属产品。