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Chronological analysis of Omura Bay bottom sediment by measurement of environmental radioactivity

Research Project

Project/Area Number 14580552
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Environmental dynamic analysis
Research InstitutionNagasaki University

Principal Investigator

TAKATSUJI Toshihiro  Nagasaki University, Faculty of Environmental Studies, Associate Professor, 環境科学部, 助教授 (70163219)

Co-Investigator(Kenkyū-buntansha) NAKAMURA Tsuyoshi  Nagasaki University, Faculty of Environmental Studies, Professor, 環境科学部, 教授 (80039586)
YOSHIKAWA Isao  Nagasaki University, Faculty of Environmental Studies, Professor, 環境科学部, 教授 (80039528)
Project Period (FY) 2002 – 2003
Project Status Completed (Fiscal Year 2003)
Budget Amount *help
¥3,500,000 (Direct Cost: ¥3,500,000)
Fiscal Year 2003: ¥1,500,000 (Direct Cost: ¥1,500,000)
Fiscal Year 2002: ¥2,000,000 (Direct Cost: ¥2,000,000)
KeywordsEnvironmental Radioactivity / marine sediment / chronological estimation / elemental analysis / 放射化分析 / PIXE
Research Abstract

Sediments at the bottom of the Omura bay was analyzed. The radioactivity was analyzed by a Germanium semiconductor detector. The principal elements were analyzed by the inductively coupled, plasma atomic emission spectrometry (ICP-AES). The trace elements were mainly analyzed by the inductively coupled plasma mass spectrometry (ICP-MS).
From the radioactivity of Pb-210, horizontally separated core samples of the sediments were dated. The sedimentation rate along the coast tends to be faster than the middle of the bay. The tendency is same as Zbkyo bay and Osaka bay. The vertical distribution of Cs-137 did not show clear peak of the Global fallout of the nuclear tests and the dating with Cs-137 distribution was difficult.
The distributions of the principal elements, P, Ti, K, Mg, Na, Al, and Ca were almost uniform vertically and horizontally. The concentration of K, Ti, Y, Rb, Sr, Zr, Nb, Cs, Hf, Th, Na, Zn, W, Pb and Cd was higher than the average concentration of the earth's crust. In the elements, concentration of Na, Zn, W, Pb and Cd were increasing upward. The concentration of Cu was also clearly increasing upward. It is not appropriate to conclude easily that these trace elements pouring into the bay increase with the years because these elements may liquate out up to the surface. But concentration of Fe and Mn, which is known to liquate in anoxic condition, was decreasing upword oppositely. In the elements increasing upward, Cd is an important environmental factor, and if it is increasingly pouring into the bay, it may be the sake of human activity, and very noteworthy result.

Report

(3 results)
  • 2003 Annual Research Report   Final Research Report Summary
  • 2002 Annual Research Report
  • Research Products

    (24 results)

All Other

All Publications (24 results)

  • [Publications] Sato, H., Takatsuji, T., Takada, J., Endo, S., Hoshi, M., Yoshikawa, I., et al.: "Measuring the External Exposure Dose in the Contaminated Area Near the Chernobyl Nuclear Power Station Using the Thermoluminescence of Quartz in Bricks."Health Physics. 83・2. 227-236 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Yamamoto, M., Hoshi, M., Takada, J., Oikawa, S., Yoshikawa, L., Takatsuji, T., et al.: "Some aspects of environmental radioactivity around the former Soviet Union's Semiparatinsk nuclear test site : Local fallout Pu in Ust'-Kamenogorsk district"Journal of Radioanalytical and Nuclear Chemistry. 252. 373-394 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] 高辻俊弘: "ポアソン照射の問題点と、単一粒子照射への期待"放射線科学. 45・9. 278-288 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] 鬼塚昌彦, 遠藤暁, 石川正純, 星正治, 櫻井良憲, 高辻俊宏 他: "硼素含有壁を持つ組織等価比例計数管を用いた重水場の線質評価"京都大学原子炉実験所学術講演会報文集. 37(Web上). (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Nakamura, T., Hoel, D.G.: "Comparing cancer risks between radiation and dioxin exposure based on two-stage model"Environmetrics (Europe). 14. 203-211 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] 中村成孝, 藤安得博, 高辻俊宏, 吉川勲: "長崎における大気中の^<210>Pbと^7Beの挙動"第5回「環境放射能」研究会要旨論文集. 1P17 (2004)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] 高辻俊宏, 吉川勲: "生体と電磁界 14 磁界と放射線との対比"株式会社学会出版センター. 9 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Sato, H., Takatsuji, T., Takada, J., Endo, S., Hoshi, M., Sharifov, V.F., Veselkina, I.I., Pilenko, I.V., Kalimullin, W.A.F., Mashakin, V.B., Yoshikawa, I.Nagatomo, T., Okajima, S.: "Measuring the External Exposure Dose in the contaminated Area Near the Chernobyl Nuclear Power Station Using the Thermoluminescence of Quartz in Bricks."Health Physics. 83-2. 227-236 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Yamamoto, M., Hoshi, M., Takada, J., Oikawa, S., Yoshikawa, I., Takatsuji, T., Sekerbaev, A.Kb., Gusev, B.I.: "Some aspects of environmental radioactivity around the former Soviet Union's Semiparatinsk nuclear test site Local fallout Pu in Ust'-Kamenogorsk district"Journal of Radioanalytical and Nuclear Chemistry. 252. 373-379 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Nakamura, T., Hoel, D.G.: "Comparing cancer risks between radiation and dioxin exposure based on two-stage model"Environmetrics (Europe). 14. 203-211 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Kinukawa, N., Nakamura, T., Akazawa, K., Nose, Y.: "Authors' Reply to the letter on "The Impact of Covariate Imbalance on the Size of the Log-Rank Test in Randomized Clinical Trials."Statistics in Medicine. Vol.21. 1167-1171 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Takie, T., Harada, M., Yamanaka, T., Nakamura, T., Nose, Y.: "Association of meteorological and day-of-the-week factors with emergency hospital admissions in Fukuoka"International Journal of Biometeorology. Vol.46. 38-141 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Yoshikawa, I., Takatsuji, T.: "The induction of somatic mutations by high-LET radiations using the Drosophila assay system"Summary of Research Product. (in preparation).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] 鬼塚昌彦, 遠藤暁, 石川正純, 星正治, 櫻井良憲, 高辻俊宏 他: "硼素含有壁を持つ組織等価比例計数管を用いた重水場の線質評価"京都大学原子炉実験所学術講演会報文集. 37. Web (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] 高辻俊宏, 吉川勲, 藤安得博, 中村成孝, 松瀬美智子, 石井保裕 他: "西彼杵半島及び大村湾周辺の岩石中の放射性物質について、他"第4回環境放射能・放射線-夏の学校 プロシーディング. 64-77 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] 高辻俊宏, 吉川勲, 藤安得博, 中村成孝 他: "大村湾堆積物中における重金属元素分析他"第5回環境放射能・放射線-夏の学校プロシーディング. (印刷準備中). (2004)

    • Related Report
      2003 Annual Research Report
  • [Publications] 中村成孝, 藤安得博, 高辻俊宏, 吉川勲: "長崎における大気中の^<210>Pbと^7Beの挙動"第5回「環境放射能」研究会要旨論文集. 1P17 (2004)

    • Related Report
      2003 Annual Research Report
  • [Publications] Nakamura, T., Hoel, D.G.: "Comparing cancer risks between radiation and dioxin exposure based on two-stage model"Environmetrics(Europe). 14. 203-211 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] Sato, H., Takatsuji, T., Takada, J., Endo, S., Hoshi, M., Yoshikawa, I.et al.: "Measuring the External Exposure Dose in the Contaminated Area Near the Chernobyl Nuclear Power Station Using the Thermoluminescence of Quartz in Bricks"Health Physics. 83・2. 227-236 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] Yamamoto, M., Hoshi, M., Takada, J., Oikawa, S., Yoshikawa, I., Takatsuji, T.et al.: "Someaspects of environmental radioactivity around the former Soviet Union' s Semiparatinsk nuclear test site : Local fallout Pu in Ust'-Kamenogorsk district"Journal of Radioanalytical and Nuclear Chemistry. 252. 373-394 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] 高辻俊宏: "ポアソン照射の問題点と、単一粒子照射への期待"放射線科学. 45・9. 278-288 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] 鬼塚昌彦, 遠藤暁, 石川正純, 星正治, 櫻井良憲, 古林徹, 内海博司, 高田真志, 山口寛, 前田直子, 早渕尚文, 高辻俊宏: "硼素含有壁を持つ組織等価比例計数管を用いた重水場の線質評価"京都大学原子炉実験所学術講演会報文集. 37. (2003)

    • Related Report
      2002 Annual Research Report
  • [Publications] 高辻俊宏, 吉川勲 他: "閉鎖系水域(大村湾)における海底堆積物放射能測定・西彼杵半島及び大村湾周辺の岩石中の放射性物質について"第4回環境放射能・放射線-夏の学校 プロシーデイング. (印刷準備中). (2003)

    • Related Report
      2002 Annual Research Report
  • [Publications] 高辻俊宏, 吉川勲: "生体と電磁界14 磁界と放射線との対比"株式会社学会出版センター. 9 (2003)

    • Related Report
      2002 Annual Research Report

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Published: 2002-04-01   Modified: 2016-04-21  

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