Records of iodine isotopes (I-129, I-127) in the Barkol peat bog from northwest China and their sources, transport and preservation

doi:10.1016/j.chemosphere.2021.130531

	Records of iodine isotopes (I-129, I-127) in the Barkol peat bog from northwest China and their sources, transport and preservation
	Zhao, Xue 1,2,3; Hou, Xiaolin 1,2,4,5; Zhang, Dongliang 6; Yang, Yunpeng 7; Huang, Zhao 1,2,8; Liu, Qi 1,2
刊名	CHEMOSPHERE
	2021-09-01
卷号	279 页码:8
关键词	Oceanic iodine Iodine-129 Peat sediment Barkol lake Geochemical behavior
ISSN号	0045-6535
DOI	10.1016/j.chemosphere.2021.130531
通讯作者	Hou, Xiaolin(xiho@dtu.dk)
英文摘要	The research on geochemical behaviors of iodine is significant for deep understanding of the source and distribution of iodine on the earth. However, as one of the most important sources, the ocean emissions and relative transport pathways of iodine, as well as the preservation after deposition are still not well known, especially in the arid areas of central Asia. A peat sediment core collected nearby Barkol Lake from northwest China was analyzed for iodine isotopes (I-127 and I-129). The observed high I-127 concentration in the top 2 cm indicated a significant accumulation of iodine in the surface oxic conditions due to the continuous sources of incompletely decomposed organic matter. Dissociation of iodine into pore waters occurred once the anoxic conditions established beneath the surface by a serial reduction reaction during the degradation of organic matter. The temporal variation of anthropogenic I-129 in the peat sediment recorded its sources and transport pathways. Besides the global fallout I-129 during late 1950s and early 1960s, the significantly increased air releases from the European nuclear fuel reprocessing plants during 1975-1997 and the increased marine discharges since 1990s contributed the major portion of I-129 in the peat core. The major transport pathway of I-129 from the Europe was through Westerlies following the re-emission of the marine discharged I-129 to the atmosphere, indicating a clearly ocean emitted iodine in the concerned central Asia. (C) 2021 Elsevier Ltd. All rights reserved.
资助项目	Chinese Academy of Sciences[XDB40000000] ; Chinese Academy of Sciences[132B61KYSB20180003] ; Natural Science Foundation of China[11875261] ; Natural Science Foundation of China[41991252] ; Ministry of Science and Technology of China[2015FY110800]
WOS关键词	NUCLEAR ACTIVITIES ; TIME-SERIES ; SEDIMENTS ; SPECIATION ; GEOCHEMISTRY ; CIRCULATION ; ACCIDENT ; SEAWATER ; SEARCH ; CORE
WOS研究方向	Environmental Sciences & Ecology
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000659971200055
资助机构	Chinese Academy of Sciences ; Natural Science Foundation of China ; Ministry of Science and Technology of China
内容类型	期刊论文
源URL	[http://ir.ieecas.cn/handle/361006/16801]
专题	地球环境研究所_加速器质谱中心第四纪科学与全球变化卓越创新中心
通讯作者	Hou, Xiaolin
作者单位	1.Chinese Acad Sci, Xian AMS Ctr, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710061, Peoples R China 2.Shaanxi Key Lab Accelerator Mass Spectrometry Tec, Xian 710061, Peoples R China 3.Xian Inst Innovat Earth Environm Res, Xian 710061, Peoples R China 4.Tech Univ Denmark, Dept Environm Engn, Riso Campus, DK-4000 Roskilde, Denmark 5.CAS Ctr Excellence Quaternary Sci & Global Change, Xian 710061, Peoples R China 6.Chinese Acad Sci, Xinjiang Inst Ecol & Geog, State Key Lab Desert & Oasis Ecol, Urumqi 830011, Peoples R China 7.Henan Univ, Coll Environm & Planning, Kaifeng 475004, Peoples R China 8.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Zhao, Xue,Hou, Xiaolin,Zhang, Dongliang,et al. Records of iodine isotopes (I-129, I-127) in the Barkol peat bog from northwest China and their sources, transport and preservation[J]. CHEMOSPHERE,2021,279:8.
APA	Zhao, Xue,Hou, Xiaolin,Zhang, Dongliang,Yang, Yunpeng,Huang, Zhao,&Liu, Qi.(2021).Records of iodine isotopes (I-129, I-127) in the Barkol peat bog from northwest China and their sources, transport and preservation.CHEMOSPHERE,279,8.
MLA	Zhao, Xue,et al."Records of iodine isotopes (I-129, I-127) in the Barkol peat bog from northwest China and their sources, transport and preservation".CHEMOSPHERE 279(2021):8.