酸性矿水和酸性矿水-海水条件下schwertmanite中稀土元素的解吸

IF 3.6 2区地球科学 Q1 GEOCHEMISTRY & GEOPHYSICS Chemical Geology Pub Date : 2024-12-22 DOI:10.1016/j.chemgeo.2024.122588

Joan Gutiérrez-León, Sergio Carrero, Devis Di Tommaso, Dimitrios Toroz, Alejandro Fernandez-Martinez, Antonio Aguilar, Alba Lozano, Rafael Pérez-López, Josep M. Soler, Jordi Cama

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引用次数: 0

摘要

在酸性矿山水环境中，Schwertmannite作为稀土元素（ree）的汇，在稀土元素的去向中起着重要的作用。施魏锰矿的沉淀条件（即富硫酸盐水，pH值在2.5 ~ 3.5之间）不适合这种羟基氧化铁（Fe8O8(OH)6SO4）吸附稀土。在受AMD影响的河流汇合处的河口（如西班牙西南部Ría de Huelva河口的Odiel河和Tinto河），AMD与海水混合，使pH值在4.5 - 8之间升高，从而使稀土元素在pH值为环中性的施wertmannite上吸附。然而，河口潮汐动力学使富含稀土元素的施wertmannite暴露在酸性更强的水中，从而导致稀土元素的解吸，这一点尚有待研究。

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Desorption of rare earth elements (REEs) from schwertmannite under acid mine drainage (AMD) and AMD-seawater conditions

Schwertmannite as a sink for rare earth elements (REEs) in environments affected by acid mine drainage (AMD) plays a significant role in the fate of these elements. The conditions to precipitate schwertmannite (i.e., sulfate-rich water and pH between 2.5 and 3.5) are not suitable for this Fe-oxyhydroxysulfate (Fe8O8(OH)6SO4) to adsorb REEs. In estuaries where AMD-impacted rivers meet (e.g. the Odiel and the Tinto rivers in the Ría de Huelva estuary in SW Spain), AMD mixes with seawater raising the pH between 4.5 and 8, thereby enabling REE adsorption on schwertmannite at circumneutral pH. However, the estuarine tidal dynamics exposes REE-enriched schwertmannite to more acidic water, inducing REE desorption, which has yet to be studied.

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来源期刊

Chemical Geology 地学-地球化学与地球物理

CiteScore

7.20

自引率

10.30%

发文量

374

审稿时长

3.6 months

期刊介绍： Chemical Geology is an international journal that publishes original research papers on isotopic and elemental geochemistry, geochronology and cosmochemistry. The Journal focuses on chemical processes in igneous, metamorphic, and sedimentary petrology, low- and high-temperature aqueous solutions, biogeochemistry, the environment and cosmochemistry. Papers that are field, experimentally, or computationally based are appropriate if they are of broad international interest. The Journal generally does not publish papers that are primarily of regional or local interest, or which are primarily focused on remediation and applied geochemistry. The Journal also welcomes innovative papers dealing with significant analytical advances that are of wide interest in the community and extend significantly beyond the scope of what would be included in the methods section of a standard research paper.