Cerium occurs as cerium-phosphate clusters around bioapatite nanocrystals in deep-sea sediments.

IF 8.9 1区 地球科学 Q1 ENVIRONMENTAL SCIENCES
Communications Earth & Environment Pub Date : 2025-01-01 Epub Date: 2025-06-16 DOI:10.1038/s43247-025-02439-2
Alain Manceau, Anne-Claire Gaillot, Jianlin Liao, Yan Li, Olivier Mathon, Kirill A Lomachenko, Pieter Glatzel, Alexandre Simionovici, Mélanie Balvay, Sophie A L Paul, Andrea Koschinsky, Stephan N Steinmann
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引用次数: 0

Abstract

Deep-sea mud is rich in rare-earth elements, primarily found in fluorapatite, a mineral deposit that forms over hundreds of thousands to millions of years through the accumulation of fish remains. After fish die, biogenic apatite captures rare earth elements from seawater on the seafloor and from pore waters during the diagenesis process. The conventional model for rare earth element enrichment suggests that they are incorporated into the bioapatite crystal structure through solid-state diffusion. However, our data reveal that cerium atoms are instead precipitated within an amorphous layer surrounding bioapatite nanocrystals, as shown by high-energy-resolution X-ray absorption spectroscopy and transmission electron microscopy. Computational simulations further support this finding, predicting that cerium atoms cluster on the surface of fluorapatite. These results suggest that the fluorapatite-water interface plays a crucial role in the enrichment of cerium, as well as other rare earth elements, in marine sediments.

在深海沉积物中,铈以铈-磷酸盐团簇形式存在于生物磷灰石纳米晶体周围。
深海泥浆富含稀土元素,主要存在于氟磷灰石中,氟磷灰石是一种经过数十万至数百万年鱼类残骸堆积而成的矿床。鱼类死亡后,生物磷灰石在成岩过程中从海底海水和孔隙水中捕获稀土元素。传统的稀土元素富集模型表明,稀土元素是通过固态扩散进入生物磷灰石晶体结构的。然而,我们的数据显示,铈原子反而沉淀在生物磷灰石纳米晶体周围的无定形层中,如高能分辨率x射线吸收光谱和透射电子显微镜所示。计算模拟进一步支持这一发现,预测铈原子聚集在氟磷灰石表面。这些结果表明,氟磷灰石-水界面在海洋沉积物中铈和其他稀土元素的富集中起着至关重要的作用。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Communications Earth & Environment
Communications Earth & Environment Earth and Planetary Sciences-General Earth and Planetary Sciences
CiteScore
8.60
自引率
2.50%
发文量
269
审稿时长
26 weeks
期刊介绍: Communications Earth & Environment is an open access journal from Nature Portfolio publishing high-quality research, reviews and commentary in all areas of the Earth, environmental and planetary sciences. Research papers published by the journal represent significant advances that bring new insight to a specialized area in Earth science, planetary science or environmental science. Communications Earth & Environment has a 2-year impact factor of 7.9 (2022 Journal Citation Reports®). Articles published in the journal in 2022 were downloaded 1,412,858 times. Median time from submission to the first editorial decision is 8 days.
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