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2018 Fiscal Year Annual Research Report

Long-term dynamics of radiocesium in aquatic ecosystems of Fukushima and Chernobyl contaminated areas

Research Project

Project/Area Number 18H03389
Research InstitutionFukushima University

Principal Investigator

Konoplev Aleksei  福島大学, 環境放射能研究所, 教授 (00745581)

Co-Investigator(Kenkyū-buntansha) 難波 謙二  福島大学, 共生システム理工学類, 教授 (70242162)
塚田 祥文  福島大学, 環境放射能研究所, 教授 (50715498)
高橋 隆行  福島大学, 共生システム理工学類, 教授 (70197151)
高瀬 つぎ子  福島大学, 環境放射能研究所, 特任准教授 (10466641)
和田 敏裕  福島大学, 環境放射能研究所, 准教授 (90505562)
脇山 義史  福島大学, 環境放射能研究所, 講師 (40594792)
Zheleznyak Mark  福島大学, 環境放射能研究所, 特任教授 (90745712)
RAHMAN Ismail  福島大学, 環境放射能研究所, 准教授 (60773067)
Project Period (FY) 2018-04-01 – 2021-03-31
KeywordsFukushima / Chernobyl / radiocesium / rivers / distribution / transport / speciation / migration
Outline of Annual Research Achievements

Water samples have been collected for dissolved and particulate r-Cs at 8 sites of Abukuma River, 3 sites of Niida River, 3 sites of Maeda River, as well as on two dam reservoirs and four irrigation ponds in Okuma town (monthly sampling). In irrigation ponds r-Cs showed a persistent behavior and was characterized by regular seasonal variations: the r-Cs concentrations tend to grow in the summer and decrease in the winter. Similar behavior of r-Cs was observed in Chernobyl cooling pond over 32 years after the accident. Speciation analysis for Okuma ponds showed much high. It has been shown that the dynamics of radionuclides in the surface runoff and rivers is initially governed by their fixation on mineral particles, while later mainly by changes of the radionuclide activity concentration in the topsoil layer. Several methodologies to collect water samples and separate particulate and dissolved fractions have been used: in situ filtration by original “Midia” system and IER adopted in situ filtration system , as well as laboratory setups. All applied methodologies showed comparable results for all rivers under study. For all rivers, reservoirs and ponds higher values of distribution coefficient between particulate and dissolved r-Cs have been confirmed, as compared with water bodies in Chernobyl contaminated area. All rivers demonstrated higher r-Cs activity concentrations for river mouth as compared with upstream sections. It was explained by the change of river water hydrochemistry from upstream to mouth, specifically a substantial increase of K+ concentration.

Current Status of Research Progress
Current Status of Research Progress

1: Research has progressed more than it was originally planned.

Reason

The research is progressing in accordance with the Plan. All permissions for sampling and observations were processed and received in time well before the fieldwork. Access to FDNPP exclusion zone was for fieldwork was provided timely. All necessary equipment and materials were purchased well before the field and laboratory work. Visiting researcher (V. Kanivets from Kiev, Ukraine) was invited to apply in situ water sampling and filtration in the field. Institute of Environmental Radioactivity (IER) has necessary facilities available to carry out planned research. Management of IER and Fukushima University provided continuous support to the Project performance. Participants of the Project held three coordination meetings to plan in details activity and to distribute responsibility among participants. Progress and results of the Project were presented for IER Seminar and IER Fukushima University Annual Symposium.

Strategy for Future Research Activity

Bottom sediments will be collected in Ogaki Dam reservoir (Ukedo River), Yokokawa Dam reservoir (Ota River), Sakashita Dam (Kuma River) reservoir and Shinobu Dam reservoir (Abukuma River) by innovative technique being developed at IER using underwater robot and by conventional technique. Fish will be collected by conventional techniques using gill nets. On the basis of bottom sediments r-Cs vertical distribution in deep accumulating areas of reservoirs dynamics of particulate and dissolved r-Cs from 2011 to 2019 will be reconstructed. R-Cs dynamics in irrigation ponds of Okuma town (Suzuuchi, Funasawa, Inkyozaka and kashiramori) for 2014-2019 will be compared with lakes in Chernobyl exclusion zone Glubokoe and Azbuchin as well as lake Vorsee (Germany) and Svyatoe (Russia). Influence of vertical migration of r-Cs in soils on river catchment on particulate and dissolved r-Cs activity concentrations in river water will be studied. The role of salinity in remobilization of r-Cs from sediments in mouth areas of the rivers Abukuma, Niida and Maeda will be studied. The remobilization of r-Cs will be quantified through concentrations of r-Cs competitive cations such as potassium and ammonium. 32-years data after the Chernobyl accident will serve as a basis for prediction of fate and transport Fukushima-derived r-Cs. Dynamics of r-Cs both in Fukushima and Chernobyl will be modelled and predicted using analytical, empirical, semi-empirical and numerical models (MOIRA, COASTOX and TH REETOX) integrated in the Hydrological Dispersion module of EC RODOS system.

  • Research Products

    (27 results)

All 2019 2018

All Journal Article (8 results) (of which Int'l Joint Research: 3 results,  Peer Reviewed: 7 results,  Open Access: 1 results) Presentation (19 results) (of which Int'l Joint Research: 3 results,  Invited: 2 results)

  • [Journal Article] Formation and stability of the mixed-chelator complexes of Sr2+, Mg2+, Ca2+, Ba2+, and Y3+ in solution with bio-relevant chelators2019

    • Author(s)
      Begum Zinnat A.、Rahman Ismail M.M.、Takase Tsugiko、Hasegawa Hiroshi
    • Journal Title

      Journal of Inorganic Biochemistry

      Volume: 195 Pages: 141~148

    • DOI

      10.1016/j.jinorgbio.2019.03.018

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Synthesis of 2,6-di(1,8-naphthyridin-2-yl)pyridines functionalized at the 4-position: Building blocks for suitable metal complex-based dyes2019

    • Author(s)
      Shunsuke Nakamura, Tsugiko Takase, Dai Oyama
    • Journal Title

      SYNTHETIC COMMUNICATIONS

      Volume: in printing Pages: in printing

    • Peer Reviewed
  • [Journal Article] fac-Bromido/chlorido(0.50/0.50)[3-carbamoyl-1-(1,10-phenanthrolin-2-ylmethyl)pyridinium-k2N,N']tricarbonylmanganese(I) 0.46-bromide 0.51-chloride methanol monosolvate2019

    • Author(s)
      Kosei Wadayama, Tsugiko Takase, Dai Oyama
    • Journal Title

      IUCrData

      Volume: 4 Pages: x181792

    • DOI

      10.1107/S2414314618017923

    • Peer Reviewed / Open Access
  • [Journal Article] Radiocesium in Ponds in the Near Zone of Fukushima Dai-ichi NPP2018

    • Author(s)
      Konoplev A. V.、Wakiyama Y.、Wada T.、Golosov V. N.、Nanba K.、Takase T.
    • Journal Title

      Water Resources

      Volume: 45 Pages: 589~597

    • DOI

      10.1134/S0097807818040139

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Natural attenuation of Fukushima-derived radiocesium in soils due to its vertical and lateral migration2018

    • Author(s)
      Konoplev A.、Golosov V.、Wakiyama Y.、Takase T.、Yoschenko V.、Yoshihara T.、Parenyuk O.、Cresswell A.、Ivanov M.、Carradine M.、Nanba K.、Onda Y.
    • Journal Title

      Journal of Environmental Radioactivity

      Volume: 186 Pages: 23~33

    • DOI

      10.1016/j.jenvrad.2017.06.019

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Spatial and seasonal variations of radiocesium concentrations in an algae-grazing annual fish, ayu Plecoglossus altivelis collected from Fukushima Prefecture in 20142018

    • Author(s)
      Morishita Daigo、Wada Toshihiro、Noda Takuji、Tomiya Atsushi、Enomoto Masahiro、Sato Toshiyuki、Suzuki Shunji、Kawata Gyo
    • Journal Title

      Fisheries Science

      Volume: 85 Pages: 561-569

    • DOI

      10.1007/s12562-018-1280-8

  • [Journal Article] Coordination chemistry of mononuclear ruthenium complexes bearing versatile 1,8-naphthyridine units: Utilization of specific reaction sites constructed by the secondary coordination sphere2018

    • Author(s)
      Dai Oyama, Ryosuke Abe, Tsugiko Takase
    • Journal Title

      Coordination Chemistry Reviews

      Volume: 375 Pages: 424-433

    • Peer Reviewed
  • [Journal Article] Crystal structure of a dinuclear ruthenium(II) complex with a bent CO2 bridge2018

    • Author(s)
      Tsugiko Takase, Ryosuke Abe, Dai Oyama
    • Journal Title

      Acta Crystallographica

      Volume: E74 Pages: 1097-1100

    • Peer Reviewed
  • [Presentation] Development of an atomic interior surveying robot -Strength Evaluation of sampling arm unit using low melting point alloy2019

    • Author(s)
      Noriaki SETO, Luis CANETE, and Takayuki TAKAHASHI
    • Organizer
      The Fourth Conference for R&D Initiative on Nuclear Decommissioning Technology by the Next Generation (NDEC4)
  • [Presentation] Development of a small glider type UROV for environmental surveying -Basic study of buoyancy controller using carbon dioxide cylinder2019

    • Author(s)
      Kazuki Funakoshi, Luis Canete, and Takayuki Takahashi
    • Organizer
      SICE Tohoku Chapter workshop
  • [Presentation] Study of hydrofoil characteristics for development of glider type small underwater robot for environmental survey,2019

    • Author(s)
      Ryo KANNO, Mizuho HIRAO, Luis CANETE, and Takayuki TAKAHASHI
    • Organizer
      19th Annual Conference of SICE System Integration Division
  • [Presentation] Long-term dynamics of radionuclides in the soil-water environment: Fukushima and Chernobyl2018

    • Author(s)
      Konoplev Aleksei
    • Organizer
      SPERA Conference 2018, Perth, Australia
    • Int'l Joint Research
  • [Presentation] Fate and Transport of Accidentally Released Radionuclides in Soil-Water Environment: Fukushima and Chernobyl2018

    • Author(s)
      Konoplev A., Wakiyama Y., Nanba K., Golosov V., Onda Y.
    • Organizer
      AGU Fall Meeting, washington DC, USA
    • Int'l Joint Research
  • [Presentation] Similarities and differences in behavior of Chernobyl derived and Fukushima Dai-ichi derived radionuclides in the environment2018

    • Author(s)
      Konoplev Aleksei
    • Organizer
      Fukushima Research Conference on Development of Analytical Techniques in Waste Management (FRCWM 2018), Tomioka, Japan
    • Invited
  • [Presentation] Long-term dynamics of radiocesium in soil-water environment: Chernobyl and Fukushima2018

    • Author(s)
      Konoplev Aleksei
    • Organizer
      Radiochemistry 2018, St-Petersburg, Russia
    • Invited
  • [Presentation] Comparative analysis of radiocesium dynamics in the environment: Fukushima and Chernoby2018

    • Author(s)
      Konoplev Aleksei
    • Organizer
      Ecological, Industrial and Energetic Safety, Sevastopol, Russia
  • [Presentation] Effect of extraction variables for the chelator-assisted washing remediation of strontium and geochemically-related elements from soils2018

    • Author(s)
      I.M.M. Rahman, Z.A. Begum, B. Ahmmad, H. Tsukada, and H. Hasegawa,
    • Organizer
      67th Annual Meeting of Japan Society for Analytical Chemistry, Sendai, Japan
  • [Presentation] Equilibrium constant for the complexation of mixed chelators (GLDA and HIDS) with Sr and geochemically-related elements (Mg, Ca, Ba) in aqueous solution2018

    • Author(s)
      Z.A. Begum, I.M.M. Rahman and H. Hasegawa
    • Organizer
      67th Annual Meeting of Japan Society for Analytical Chemistry, Sendai, Japan
  • [Presentation] Development of an atomic interior surveying robot -Strength evaluation of sampling arm unit using low melting point alloy2018

    • Author(s)
      Noriaki SETO, Luis CANETE, and Takayuki TAKAHASHI
    • Organizer
      19th Annual Conference of SICE System Integration Division
  • [Presentation] Development of an atomic interior surveying robot -Prototyping of sampling arm unit using low melting point alloy2018

    • Author(s)
      Noriaki SETO, Luis CANETE, and Takayuki TAKAHASHI
    • Organizer
      IRID Symposium
  • [Presentation] Development of an atomic interior surveying robot -Prototyping of sampling arm unit using low melting point alloy2018

    • Author(s)
      Noriaki SETO, Luis CANETE, and Takayuki TAKAHASHI
    • Organizer
      2018 JSME Conference on Robotics and Mechatronics
  • [Presentation] Development of a small and modular glider UROV for environmental surveying -Examination for operating time shortening for small buoyancy engine using hydrogen storage alloy2018

    • Author(s)
      Mizuki TANAKI, Mizuho HIRAO, Ryo KANNO, Luis CANETE, and Takayuki TAKAHASHI
    • Organizer
      2018 JSME Conference on Robotics and Mechatronics
  • [Presentation] Wing simulation for glider type small underwater robot for environmental survey -Comparative Study of model experiment and simulation2018

    • Author(s)
      Ryo KANNO, Mizuki TANAKI, Mizuho HIRAO, Luis CANETE, and Takayuki TAKAHASHI
    • Organizer
      2018 JSME Conference on Robotics and Mechatronics
  • [Presentation] Development of a small glider type UROV for environmental surveying2018

    • Author(s)
      Mizuho HIRAO, Ryo KANNO, Mizuki TANAKI, Luis CANETE, and Takayuki TAKAHASHI
    • Organizer
      2018 JSME Conference on Robotics and Mechatronics
  • [Presentation] Development of an atomic interior surveying robot arm2018

    • Author(s)
      Noriaki SETO, Luis CANETE, Takayuki TAKAHASHI
    • Organizer
      Fukushima Research Conference on Development of Analytical Techniques in Waste Management (FRCWM2018)
  • [Presentation] VERTICAL AND LATERAL MIGRATION OF FUKUSHIMA-DERIVED RADIOCESIUM WITHIN NIIDA RIVER CATCHMENT2018

    • Author(s)
      Konoplev A., Golosov V., Wakiyama Y., nanba K., Onda Y., Takase T.
    • Organizer
      ICCE symposium 2018 "Climate Change Impacts on Sediment Dynamics: Measurement, Modelling and Management, Moscow, Russia
    • Int'l Joint Research
  • [Presentation] Temporal trends of 137Cs activity concentration in pond waters in the vicinity of Fukushima Dai-ichi nuclear power plant2018

    • Author(s)
      Wakiyama Y., Konoplev A., Wada T., Takase T., Igarashi Y., Nanba K., Byrnes I.
    • Organizer
      ICCE symposium 2018 "Climate Change Impacts on Sediment Dynamics: Measurement, Modelling and Management, Moscow, Russia

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Published: 2019-12-27  

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