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The Dynamics of Mercury and Selenium Released by Submarine Volcanic Activity in Kagoshima Bay

Research Project

Project/Area Number 19H01168
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section一般
Review Section Medium-sized Section 64:Environmental conservation measure and related fields
Research InstitutionKagoshima University

Principal Investigator

Tomiyasu Takashi  鹿児島大学, 理工学域理学系, 教授 (60217552)

Co-Investigator(Kenkyū-buntansha) 松山 明人  国立水俣病総合研究センター, その他部局等, 室長 (00393463)
児玉谷 仁  鹿児島大学, 理工学域理学系, 准教授 (30434468)
神崎 亮  鹿児島大学, 理工学域理学系, 准教授 (50363320)
小針 統  鹿児島大学, 農水産獣医学域水産学系, 教授 (60336328)
本村 浩之  鹿児島大学, 総合科学域共同学系, 教授 (90433086)
幅野 明正  鹿児島大学, 農水産獣医学域水産学系, 准教授 (60274841)
Project Period (FY) 2019-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥45,760,000 (Direct Cost: ¥35,200,000、Indirect Cost: ¥10,560,000)
Fiscal Year 2022: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2021: ¥9,230,000 (Direct Cost: ¥7,100,000、Indirect Cost: ¥2,130,000)
Fiscal Year 2020: ¥14,040,000 (Direct Cost: ¥10,800,000、Indirect Cost: ¥3,240,000)
Fiscal Year 2019: ¥18,980,000 (Direct Cost: ¥14,600,000、Indirect Cost: ¥4,380,000)
Keywords水銀 / セレン / 海底火山活動 / プランクトン / 鹿児島湾 / 生態系影響 / 有機水銀 / 無機水銀 / 海底熱水噴気活動 / 毒性抑制作用 / 海水 / 生態系 / 海底噴気熱水活動
Outline of Research at the Start

海底火山活動による水銀の放出が確認されている鹿児島湾において、海水中水銀分布を追跡するとともに、海水から、懸濁態粒子、プランクトン、魚と、その媒体の変化に伴う水銀挙動を追跡する。同じく火山活動によって放出されるセレンを合わせて追跡し、火山活動を起源とする水銀の動きを特徴付ける。その上で、工業活動による水銀の影響をうけた水俣湾、水銀鉱山の影響をうけたトリエステ湾(スロベニア)、小規模金精練活動の影響をうけているマンブラオ湾(フィリピン)など、異なる水銀起源をもつ他の海域との比較を行い、セレンの水銀毒性抑制作用に基づく水銀の危険性評価を試みるとともに、それに基づく対応策を検討する。

Outline of Final Research Achievements

The seawater and plankton sampling in Kagoshima Bay were conducted every 2 months during through the investigation period at bay head area and central area of the Bay; submarine volcano is located at the bottom of the bay head area. Water samples were collected every 20-50 m depth with a CTD-Rosette water sampling system. The collected water samples were used for Hg0, Hg(II), particulate Hg and filtered total Hg. The plankton samples were collected with 0.1 mm plankton net by vertical halting. The collected plankton samples were sieved into >0.5 mm, 0.5 - 0.2 mm, 0.2 - 0.1 mm, < 0.1 mm and were used for analysis of organic Hg, inorganic Hg, total Hg and total Se. Fish samples collected in Kagoshima Bay were also used for Hg and Se measurement.

Academic Significance and Societal Importance of the Research Achievements

海水中の水銀濃度とプランクトン中の水銀濃度の季節変動が調和的であること、また、それらが火山周辺では、対照地点の数十倍となることを明らかにした。また、プランクトン中の有機水銀は総水銀の約4割を占めており、火山活動によって放出された水銀が有機化し生態系へ濃縮されることが明らかになった。海底火山活動によって放出された水銀が内湾の生態系に及ぼす影響について、詳細な報告は限られており、本研究成果の学術的な意義は高い。また、水銀の毒性抑制作用を持つことから、セレン濃度は食の安全を評価するための貴重な因子であり、本研究で蓄積されたデータは、今後の研究の発展のための足掛かりとなる成果である。

Report

(6 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Annual Research Report
  • 2020 Annual Research Report
  • 2019 Comments on the Screening Results   Annual Research Report
  • Research Products

    (25 results)

All 2023 2022 2021 2020 2019 Other

All Int'l Joint Research (3 results) Journal Article (8 results) (of which Int'l Joint Research: 5 results,  Peer Reviewed: 8 results) Presentation (14 results) (of which Int'l Joint Research: 4 results,  Invited: 1 results)

  • [Int'l Joint Research] Jozef Stefan Institute(スロベニア)

    • Related Report
      2022 Annual Research Report
  • [Int'l Joint Research] Jozef Stefan Institute(スロベニア)

    • Related Report
      2019 Annual Research Report
  • [Int'l Joint Research] Ateneo de Manila University(フィリピン)

    • Related Report
      2019 Annual Research Report
  • [Journal Article] The dynamics of mercury around an artisanal and small‐scale gold mining area, Camarines Norte, Philippines2023

    • Author(s)
      Takashi Tomiyasu, Sora Yasumatsu, Hitoshi Kodamatani, Ryo Kanzaki, Chisato Takenaka, Satoshi Murao, Shuichi Miyagawa, Kenichi Nonaka, Akiko Ikeguchi, Ian A. Navarrete
    • Journal Title

      Environmental Science and Pollution Research

      Volume: 30 Issue: 8 Pages: 20052-20064

    • DOI

      10.1007/s11356-022-23497-5

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Seasonal variation in mercury species in seawater of Kagoshima Bay, southern Kyushu, Japan: The impact of active submarine volcanos on the inner bay2022

    • Author(s)
      Takashi Tomiyasu, Akihiro Mitsui, Mai Mitarai, Hitoshi Kodamatani, Ryo Kanzaki
    • Journal Title

      Marine Chemistry

      Volume: 244 Pages: 104133-104133

    • DOI

      10.1016/j.marchem.2022.104133

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] The influence of submarine volcano on seasonal changes in arsenic in the waters of Kagoshima Bay, southwestern Japan2021

    • Author(s)
      Tomiyasu Takashi、Nakagawa Misato、Kodamatani Hitoshi、Kanzaki Ryo
    • Journal Title

      Environmental Earth Sciences

      Volume: 80 Issue: 8 Pages: 331-331

    • DOI

      10.1007/s12665-021-09619-1

    • Related Report
      2021 Annual Research Report 2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Mercury concentrations in paddy field soil and freshwater snails around a small‐scale gold mining area, West Java, Indonesia2020

    • Author(s)
      Takashi Tomiyasu, Yuriko Kono Hamada, Christine Baransano, Hitoshi Kodamatani1, Akito Matsuyama, Ryusuke Imura, Nuril Hidayati, Joeni Setijo Rahajoe
    • Journal Title

      Toxicology and Environmental Health Sciences

      Volume: 12 Issue: 1 Pages: 23-29

    • DOI

      10.1007/s13530-020-00045-7

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Mercury speciation in preserved historical sludge: Potential risk from sludge contained within reclaimed land of Minamata Bay, Japan2020

    • Author(s)
      Sakamoto Mineshi、Itai Takaaki、Marumoto Kohji、Marumoto Masumi、Kodamatani Hitoshi、Tomiyasu Takashi、Nagasaka Hiromitsu、Mori Keisuke、Poulain Alexandre J.、Domingo Jose L.、Horvat Milena、Matsuyama Akito
    • Journal Title

      Environmental Research

      Volume: 180 Pages: 108668-108668

    • DOI

      10.1016/j.envres.2019.108668

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] The estimation of mercury exposure to workers through air deposition in the workshop of artisanal and small-scale gold mining2019

    • Author(s)
      Yuriko Kono Hamada, Takashi Tomiyasu
    • Journal Title

      Journal of Environment and Safety

      Volume: 10 Issue: 2 Pages: 137-142

    • DOI

      10.11162/daikankyo.E19RP0302

    • NAID

      130007705326

    • ISSN
      1884-4375, 2186-3725
    • Year and Date
      2019-09-10
    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Time variation in transfer amounts of mercury by a river system near an artisanal and small‐scale gold mining area in West Java, Indonesia2019

    • Author(s)
      Takashi Tomiyasu, Yuriko Kono Hamada, Christine Baransano, Nuril Hidayati, Joeni Setijo Rahajoe
    • Journal Title

      Environmental Earth Sciences

      Volume: 78 Issue: 24 Pages: 686-686

    • DOI

      10.1007/s12665-019-8727-9

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Transport of mercury species by river from artisanal and small-scale gold mining in West Java, Indonesia2019

    • Author(s)
      Takashi Tomiyasu, Yuriko Kono Hamada, Hitoshi Kodamatani, Nuril Hidayati, Joeni Setijo Rahajoe
    • Journal Title

      Environmental Science and Pollution Research

      Volume: 26 Issue: 24 Pages: 25262-25274

    • DOI

      10.1007/s11356-019-05718-6

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] 鹿児島湾産魚類及びプランクトン中の水銀濃度と海底火山活動の影響2023

    • Author(s)
      上蔀隼人、冨安卓滋、児玉谷仁、神崎亮
    • Organizer
      令和4年度メチル水銀研究ミーティング
    • Related Report
      2022 Annual Research Report
  • [Presentation] 鹿児島湾生体試料中の水銀及びセレン濃度と海底火山活動の影響2022

    • Author(s)
      上蔀隼人、冨安卓滋、児玉谷仁、神崎亮
    • Organizer
      第82回分析化学討論会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 鹿児島湾海水中水銀濃度に及ぼす火山活動の影響2022

    • Author(s)
      脇丸太樹、冨安卓滋、児玉谷仁、神崎亮
    • Organizer
      第82回分析化学討論会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 鹿児島湾における海水中懸濁態総水銀の濃度変動2022

    • Author(s)
      脇丸太樹、冨安卓滋、児玉谷仁、神崎亮
    • Organizer
      日本分析化学会第71年会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 鹿児島湾産魚類器官中の水銀及びセレン濃度2022

    • Author(s)
      上蔀隼人、冨安卓滋、児玉谷仁、神崎亮
    • Organizer
      日本分析化学会第71年会
    • Related Report
      2022 Annual Research Report
  • [Presentation] The dynamics of Hg and Se in Kagoshima Bay -The impact of submarine volcano on the ecosystem-2022

    • Author(s)
      Takashi Tomiyasu
    • Organizer
      GMOS-Train, BeMarmaid and IsoCont workshop
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 水俣市化学工場周辺土壌中の水銀化学形と有機物含有量2021

    • Author(s)
      下鶴優美、冨安卓滋、児玉谷仁、神崎亮
    • Organizer
      日本分析化学会 第81回分析化学討論会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 鹿児島湾生体試料中水銀及びセレン濃度と海底熱水噴気活動の影響2020

    • Author(s)
      冨安卓滋、野添千裕、児玉谷仁、神崎亮
    • Organizer
      生命金属に関する合同年会 ConMetal 2020
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] 水俣湾周辺底質中残留水銀濃度分布と底質化学組成2019

    • Author(s)
      北川俊輝、河西大悟、下内良平、児玉谷仁、神崎亮、冨安卓滋
    • Organizer
      日本地球化学会第66回年会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 鹿児島湾海底質中水銀及びセレン濃度分布と海底熱水噴気活動の影響2019

    • Author(s)
      野添千裕、児玉谷仁、神崎亮、冨安卓滋
    • Organizer
      日本地球化学会第66回年会
    • Related Report
      2019 Annual Research Report
  • [Presentation] The distribution of mercury around the Lake Sentani, Papua, Indonesia2019

    • Author(s)
      Takashi Tomiyasu, Yuriko Hamada, Christine Baransano, Henderite Loisa Ohee
    • Organizer
      14th International Conference on Mercury as a Global Pollutant
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] The dynamics of mercury around the artisanal and small-scale gold mining area, Camarines Norte, Philippines2019

    • Author(s)
      Sora YASUMATSU, Hitoshi KODAMATANI, Ryo KANZAKI, Chisato TAKENAKA, Satoshi MURAO. Shuichi MIYAGAWA, Kenichi NONAKA, Akiko IKEGUCHI, Ian A. NAVARRETE and Takashi TOMIYASU
    • Organizer
      5.14th International Conference on Mercury as a Global Pollutant
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] The distribution of mercury discharged by ASGM activity along the Kuantan River, Riau Province, Sumatra, Indonesia2019

    • Author(s)
      Takashi TOMIYASU, Hitoshi KODAMATANI, David ANDRIO, Kazutoshi NODA
    • Organizer
      6.14th International Conference on Mercury as a Global Pollutant
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 鹿児島湾産魚類に含まれるセレン及び水銀と海底熱水噴気活動による影響2019

    • Author(s)
      野添千裕、児玉谷仁、神崎亮、冨安卓滋
    • Organizer
      第79回分析化学討論会
    • Related Report
      2019 Annual Research Report

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Published: 2019-04-18   Modified: 2024-01-30  

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