Abstract Rare earth elements (REE) are critically important in clean energy technologies, but their mining and refining is energy intensive and generates significant quantities of environmentally harmful waste. The treatment of acid mine drainage (AMD), which is both a global environmental problem and a potential source of these elements, preconcentrates REE and critical metals such as manganese and cobalt into oxide/hydroxide waste products from which they can potentially be recovered. Analysis of 281 treatment solids from coal AMD remediation systems across the northern Appalachian Basin, eastern USA, indicate that the most promising solids (REE value >$400 USD/metric ton) are produced in systems that use limestone or sodium hydroxide to treat low pH (

中文翻译：

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阿巴拉契亚酸性矿山排水处理固体的临界金属回收潜力

摘要 稀土元素 (REE) 在清洁能源技术中至关重要，但它们的开采和提炼是能源密集型的，并会产生大量对环境有害的废物。酸性矿山排水 (AMD) 既是一个全球环境问题，也是这些元素的潜在来源，它的处理会将 REE 和关键金属（例如锰和钴）预浓缩为氧化物/氢氧化物废物，并有可能从中回收。对来自美国东部阿巴拉契亚盆地北部煤 AMD 修复系统的 281 种处理固体的分析表明，最有希望的固体（稀土元素价值 > 400 美元/公吨）是在使用石灰石或氢氧化钠处理低 pH 值的系统中生产的（