Rare Earth Elements in Iron Oxyhydroxides from Biofilms Containing the Fe-Oxidizing Bacteria

IF 0.7 4区地球科学 Q4 GEOCHEMISTRY & GEOPHYSICS

Lithology and Mineral Resources Pub Date : 2024-07-13 DOI:10.1134/S0024490224700597

S. B. Felitsyn

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Abstract

Iron oxyhydroxides extracted from present-day biofilms with the Fe-oxidizing bacteria Arthrobacter spp., Gallionella spp., and Leptothrix ochracea in the northwest of the East European Platform display a significant content of rare earth elements (up to 1100 ppm). The REE concentration in oxyhydroxides produced by active bacterial communities increases by one order of magnitude during 1 yr, suggesting a high sorption capacity of the newly formed iron mineral phases. Values of (La/Yb)_N, Ce, and Y anomalies in the iron oxyhydroxides are consistent with the REE distribution in surface waters accommodating the bacterial communities. The Nd isotope composition of the studied bacterial iron oxyhydroxides inherits the isotopic composition in the ambient water; ¹⁴³Nd/¹⁴⁴Nd values in the bacterial iron minerals vary from 0.511570 to 0.512220; and ε_Nd(0) from –21.8 to –9.2. The maximum proportion of radiogenic Nd is typical for the samples taken from areas marked by the presence of Paleozoic carbonate rocks in Quaternary glaciolacustrine sediments.

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含铁氧化细菌生物膜中的铁氧化物中的稀土元素

摘要从东欧地台西北部铁氧化细菌 Arthrobacter spp.、Gallionella spp.和 Leptothrix ochracea 的现今生物膜中提取的铁氧氢氧化物显示出大量稀土元素（高达 1100 ppm）。活跃细菌群落产生的氧氢氧化物中的稀土元素浓度在 1 年内增加了一个数量级，这表明新形成的铁矿物相具有很高的吸附能力。铁氧氢氧化物中 (La/Yb)N、Ce 和 Y 的异常值与细菌群落所在地表水中的 REE 分布一致。所研究的细菌铁氧氢氧化物的钕同位素组成继承了环境水中的同位素组成；细菌铁矿物中的 143Nd/144Nd 值从 0.511570 到 0.512220 不等；εNd(0) 从 -21.8 到 -9.2。在第四纪冰川湖积沉积物中存在古生代碳酸盐岩的地区采集的样品中，放射性钕的比例最大。

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来源期刊

Lithology and Mineral Resources 地学-地球化学与地球物理

CiteScore

1.30

自引率

37.50%

发文量

审稿时长

>12 weeks

期刊介绍： Lithology and Mineral Resources is an international peer reviewed journal that publishes articles on a wide range of problems related to the formation of sedimentary rocks and ores. Special attention is given to comparison of ancient sedimentary rock and ore formation with present-day processes. The major part of the journal is devoted to comparative analysis of sedimentary processes on the continents and in oceans, as well as the genetic aspects of the formation of sedimentary and hydrothermal–sedimentary mineral resources. The journal welcomes manuscripts from all countries in the English or Russian language.