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  1. 原著論文

Characterization of plutonium in deep-sea sediments of the Sulu and South China Seas

https://repo.qst.go.jp/records/45795
https://repo.qst.go.jp/records/45795
d9dd8119-2729-4fac-be4d-bd15e1fa33c5
Item type 学術雑誌論文 / Journal Article(1)
公開日 2010-05-21
タイトル
タイトル Characterization of plutonium in deep-sea sediments of the Sulu and South China Seas
言語
言語 eng
資源タイプ
資源タイプ識別子 http://purl.org/coar/resource_type/c_6501
資源タイプ journal article
アクセス権
アクセス権 metadata only access
アクセス権URI http://purl.org/coar/access_right/c_14cb
著者 Dong, Wei

× Dong, Wei

WEKO 455307

Dong, Wei

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Zheng, Jian

× Zheng, Jian

WEKO 455308

Zheng, Jian

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Guo, Qiuju

× Guo, Qiuju

WEKO 455309

Guo, Qiuju

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Yamada, Masatoshi

× Yamada, Masatoshi

WEKO 455310

Yamada, Masatoshi

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Pan, Shaoming

× Pan, Shaoming

WEKO 455311

Pan, Shaoming

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董 微

× 董 微

WEKO 455312

en 董 微

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鄭 建

× 鄭 建

WEKO 455313

en 鄭 建

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山田 正俊

× 山田 正俊

WEKO 455314

en 山田 正俊

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抄録
内容記述タイプ Abstract
内容記述 Anthropogenic Pu isotopes are important geochemical tracers for sediment studies. Their distributions and sources in the water columns as well as the sediments of the North Pacific have been intensively studied; however, information about Pu in the Southeast Asian seas is limited. To study the isotopic composition of Pu, and thus to identify its sources, we collected sediment core samples in the South China Sea and the Sulu Sea during the KH-96-5 Cruise of the R/V Hakuho Maru. We analysed the activities of 239+240Pu and the atom ratios of 240Pu/239Pu using isotope dilution sector-field inductively coupled plasma mass spectrometry (SF-ICP-MS). The 240Pu/239Pu atom ratios in the sediments of both areas (inventory-weighted mean: 0.251 for the South China Sea and 0.280 for the Sulu Sea) were higher than the global fallout value (0.178+/-0.019), suggesting the existence of Pu from the Pacific Proving Grounds in the North Pacific. Low inventories of 239+240Pu in sediments were observed in the South China Sea (3.75 Bq/m2) and the Sulu Sea (1.38 Bq/m2). Most of the Pu input is still present in the water column. Scavenging and benthic mixing processes were considered to be the main processes controlling the distribution of Pu in the deep-sea sediments of both study areas.
書誌情報 Journal of Environmental Radioactivity

巻 101, 号 8, p. 622-629, 発行日 2010-04
ISSN
収録物識別子タイプ ISSN
収録物識別子 0265-931X
DOI
識別子タイプ DOI
関連識別子 10.1016/j.jenvrad.2010.03.011
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