西班牙埃尔比耶索酸性硫酸盐水体中铁（生物）沉淀对稀土元素和钇（REY）的固定作用

RawMat 2023 Pub Date : 2023-11-16 DOI:10.3390/materproc2023015047

Blanca Rincón-Tomás, Francisco Javier González, E. López-Pamo, E. Santofimia

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引用次数: 0

摘要

:源于酸性岩石排水（ARD）的酸性硫酸盐水影响了拉席尔瓦溪流（西班牙埃尔比耶索），呈现出异常高的稀土元素和钇（REY）含量。这些稀土元素以硫酸根离子的形式溶解在水流中，形成 REYSO 4+ 和 REY(SO 4 ) 2 - 等络合物。带负电荷的 REY 复合物似乎与拉席尔瓦河及其支流中的铁沉淀物有亲和力，因为在这种低 pH 值条件下，它们的表面带正电荷。铁沉淀物中存在铁氧化细菌，这说明它们有可能参与这种 REY 固定化，并有可能将其用于（生物）修复和战略性金属工业应用。

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Immobilization of Rare Earth Elements and Yttrium (REY) by Iron (Bio)Precipitation in Acid Sulfate Waters from El Bierzo (Spain)

: Acid sulfate waters originated from acid rock drainage (ARD), affecting the La Silva stream (El Bierzo, Spain), present anomalously high values of rare earth elements and yttrium (REY). These REY are maintained dissolved along the water stream as sulfate ions forming complexes like REYSO 4+ and REY(SO 4 ) 2 − . Negatively charged REY complexes seem to have an afﬁnity for iron precipitates found along the La Silva stream and its tributaries since their surface is positively charged at this low pH. The presence of iron-oxidizing bacteria in iron precipitates addresses the possibility of their implication in this REY immobilization and its potential use in (bio)remediation and strategic metal industry applications.

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RawMat 2023

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