Speciation of iodine on biogenic iron oxyhydroxides by I K-edge and LIII-edge XANES

被引：0
|
作者：
Kikuchi, Sakiko [1 ]
Kashiwabara, Teruhiko [2 ]
Kurisu, Minako [2 ]
Wakaki, Shigeyuki [1 ,3 ]
机构：
[1] Japan Agcy Marine Earth Sci & Technol JAMSTEC, Inst Extra Cutting Edge Sci & Technol Avant Garde, Kochi Inst Core Sample Res, 200 Monobe Otsu, Nankoku, Kochi 7838502, Japan
[2] Japan Agcy Marine Earth Sci & Technol JAMSTEC, Res Inst Marine Resources Utilizat, Submarine Resources Res Ctr, 2-15 Natsushima Cho, Yokosuka, Kanagawa 2370061, Japan
[3] Natl Museum Japanese Hist, Museum Sci Div, Jonaicho 117,Sakura Ku, Chiba 2858502, Japan
来源：
CHEMISTRY LETTERS | 2024年 / 53卷 / 02期
基金：
日本学术振兴会;
关键词：
biogenic iron oxyhydroxides; iodine; X-ray absorption near-edge structure; ADSORPTION; SORPTION; OXIDES; IODATE; FERRIHYDRITE; EQUILIBRIUM; MOLYBDENUM; PREDICTION; SEDIMENTS; SOILS;
D O I：
10.1093/chemle/upae023
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
The host phase of iodine (I) in biogenic iron oxyhydroxides (BIOS) was determined using X-ray absorption near-edge structure (XANES). I K-edge and L-III-edge XANES analyses of BIOS collected from deep-sea hydrothermal environments revealed that the primary form of I in the BIOS is an organic species. Furthermore, L-III-edge XANES fitting implied the dominance of aromatic-bound I among BIOS. Our first observation of organic- trace element association in natural BIOS can explain the enhanced adsorption of I on BIOS compared to synthetic ferrihydrite. This further suggests the importance of various chemistry on this organic-mineral composite for understanding the geochemical cycling of trace elements
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页数：4
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