Speciation of iodine on biogenic iron oxyhydroxides by I K-edge and LIII-edge XANES-Reference-Cited by-同舟云学术

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

Published:2024-02 Issue:2 Volume:53 Page:
ISSN:0366-7022
Container-title:Chemistry Letters
language:en
Short-container-title:

Author:

Kikuchi Sakiko¹,Kashiwabara Teruhiko²,Kurisu Minako²,Wakaki Shigeyuki¹³

Affiliation:

1. Kochi Institute for Core Sample Research, Institute for Extra-cutting-edge Science and Technology Avant-garde Research (X-star), Japan Agency for Marine-Earth Science and Technology (JAMSTEC) , 200 Monobe-otsu , Nankoku, Kochi 783-8502, Japan

2. Submarine Resources Research Center, Research Institute for Marine Resources Utilization, Japan Agency for Marine-Earth Science and Technology (JAMSTEC) , 2-15, Natsushima-cho , Yokosuka, Kanagawa 237-0061, Japan

3. National Museum of Japanese History Museum Science Division, , Jonaicho 117 , Sakura, Chiba 285-8502, Japan

Abstract

Abstract 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 LIII-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, LIII-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.

Funder

KEK

JASRI

Grant-in-Aid for Scientific Research from the Japan Society for the Promotion of Science

Publisher

Oxford University Press (OUP)

Link

https://academic.oup.com/chemlett/article-pdf/53/2/upae023/56727695/upae023.pdf

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