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Occurrence and multimedia behavior of siloxanes in the environment

Research Project

Project/Area Number 19H04243
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 63010:Environmental dynamic analysis-related
Research InstitutionCenter for Environmental Science in Saitama

Principal Investigator

Horii Yuichi  埼玉県環境科学国際センター, 化学物質・環境放射能担当, 専門研究員 (30509534)

Co-Investigator(Kenkyū-buntansha) 大塚 宜寿  埼玉県環境科学国際センター, 化学物質・環境放射能担当, 担当部長 (30415393)
櫻井 健郎  国立研究開発法人国立環境研究所, 環境リスク・健康領域, 室長 (90311323)
今泉 圭隆  国立研究開発法人国立環境研究所, 環境リスク・健康領域, 主幹研究員 (80391069)
黒田 啓介  富山県立大学, 工学部, 准教授 (30738456)
西野 貴裕  公益財団法人東京都環境公社(東京都環境科学研究所), 環境リスク研究科, 主任研究員 (90506619)
Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥17,290,000 (Direct Cost: ¥13,300,000、Indirect Cost: ¥3,990,000)
Fiscal Year 2021: ¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2020: ¥5,590,000 (Direct Cost: ¥4,300,000、Indirect Cost: ¥1,290,000)
Fiscal Year 2019: ¥7,150,000 (Direct Cost: ¥5,500,000、Indirect Cost: ¥1,650,000)
Keywordsシロキサン / 東京湾流域 / 多媒体モデル / 排出量推定 / 排出源解析 / リスク評価 / メチルシロキサン / シリコーン / 環境計測
Outline of Research at the Start

近年、各国で一部のシロキサン類について化学物質リスク評価が実施され、環境への排出量削減に向けた取り組みが進められている。本研究では、特異な物性を示すシロキサン類(特に環状シロキサン)について、多媒体中の濃度分布を実測により明らかにするとともに、地理的分解能を有する多媒体環境動態モデル(G-CIEMS)による予測を行い、排出を含めた環境挙動の全体像を明らかにすることを目的とする。G-CIEMSの最大の特長である地理的分解能を活用することで、シロキサン類排出量の増減を仮定した単位流域毎の濃度分布を予測し、実測ベースのみでなく排出シナリオに応じたリスク評価を実施する。

Outline of Final Research Achievements

We attempted to elucidate the overall environmental behavior of siloxanes, which have unique physical properties, by investigating their special distribution in multi-media and predicting with Grid-Catchment Integrated Environmental Modeling System (G-CIEMS). Concentrations of siloxanes in river water, sediment, and air collected from Tokyo Bay catchment basin were measured. In emission source analysis, non-negative matrix factorization was applied to estimate type of emission sources and their contribution rates. In the emission estimation, emission factors from the use of daily commodities and silicone manufacturing plants were considered for estimating emissions into the air and water systems. In the multi-media model predictions, G-CIEMS showed multi-media behavior for D4, D5, and D6 in Tokyo Bay catchment basin. As a reliability evaluation of the model predictions including the emission estimation, we compared and collated the model predictions with the actual measurements.

Academic Significance and Societal Importance of the Research Achievements

国内におけるシロキサン類の環境濃度分布、環境への排出量、また環境挙動に関する情報は極めて少ない。本研究では、当該化学物質の高負荷量地域である東京湾流域を対象に、実測、排出源解析、排出量推定、及び多媒体モデルを融合する多角的なアプローチにより研究を実施した。これにより、シロキサン類の排出源、排出先別の排出量や周辺環境への影響評価等に関する情報が整備された。これらの研究成果は、当該化学物質の適正管理に資するのみでなく、モデル予測の高精度化等により、他の化学物質のリスク評価・管理にも適用可能と期待される。

Report

(4 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Annual Research Report
  • 2019 Annual Research Report
  • Research Products

    (16 results)

All 2022 2021 2020 2019 Other

All Journal Article (4 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 4 results,  Open Access: 2 results) Presentation (11 results) (of which Int'l Joint Research: 3 results,  Invited: 1 results) Remarks (1 results)

  • [Journal Article] Spatial distribution and benthic risk assessment of cyclic, linear, and modified methylsiloxanes in sediments from Tokyo Bay catchment basin, Japan: Si-based mass profiles in extractable organosilicon2022

    • Author(s)
      Yuichi Horii, Nobutoshi Ohtsuka, Takahiro Nishino, Keisuke Kuroda, Yoshitaka Imaizumi, Takeo Sakurai
    • Journal Title

      Science of The Total Environment

      Volume: 838 Pages: 155956-155956

    • DOI

      10.1016/j.scitotenv.2022.155956

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Spatial distribution and accumulation profiles of volatile methylsiloxanes in Tokyo Bay, Japan: Mass loadings and historical trends2022

    • Author(s)
      Yuichi Horii, Kotaro Minomo, James C.W. Lam, Nobuyoshi Yamashita
    • Journal Title

      Science of The Total Environment

      Volume: 806 Pages: 150821-150821

    • DOI

      10.1016/j.scitotenv.2021.150821

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Distribution characteristics of methylsiloxanes in atmospheric environment of Saitama, Japan: Diurnal and seasonal variations and emission source apportionment2021

    • Author(s)
      Horii Yuichi、Ohtsuka Nobutoshi、Minomo Kotaro、Takemine Shusuke、Motegi Mamoru、Hara Masayuki
    • Journal Title

      Science of The Total Environment

      Volume: 754 Pages: 142399-142399

    • DOI

      10.1016/j.scitotenv.2020.142399

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Georeferenced multimedia environmental fate of volatile methylsiloxanes modeled in the populous Tokyo Bay catchment basin2019

    • Author(s)
      Takeo Sakurai, Yoshitaka Imaizumi, Keisuke Kuroda, Takehiko I. Hayashi, Noriyuki Suzuki
    • Journal Title

      Science of The Total Environment

      Volume: 689 Pages: 843-853

    • DOI

      10.1016/j.scitotenv.2019.06.462

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] 東京湾集水域における水中揮発性メチルシロキサンの濃度分布、経年変化、及び環境リスク2022

    • Author(s)
      堀井勇一、大塚宜寿、西野貴裕、櫻井健郎、今泉圭隆、黒田啓介
    • Organizer
      環境化学物質3学会合同大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 環境試料のGC/MS スキャンデータからのNMF によるピークの検出(2)2022

    • Author(s)
      大塚宜寿、蓑毛康太郎、橋本俊次
    • Organizer
      環境化学物質3学会合同大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Distribution characteristics of methylsiloxanes in atmospheric environment of Kanto region, Japan: the emission source apportionment2021

    • Author(s)
      Yuichi Horii, Nobutoshi Ohtsuka, Takahiro Nishino, Takeo Sakurai, Yoshitaka Imaizumi, Keisuke Kuroda, Yuichi Nakasone, Kumiko Kimura, Yusuke Ito, Akira Shimizu
    • Organizer
      41st International Symposium on Halogenated Persistent Organic Pollutants
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 大気中揮発性メチルシロキサンの存在実態解明のための関東広域調査2021

    • Author(s)
      堀井勇一、大塚宜寿、西野貴裕、櫻井健郎、今泉圭隆、黒田啓介、中曽根佑一、木村久美子、伊東優介、清水明
    • Organizer
      第29回環境化学討論会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 揮発性メチルシロキサンの大気中バックグラウンド濃度の測定2021

    • Author(s)
      堀井勇一、米持真一、櫻井健郎、西野貴裕、髙菅卓三、山下信義
    • Organizer
      第29回環境化学討論会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 地理的分解能を有する多媒体環境動態モデルG-CIEMSによる揮発性メチルシロキサンの流域動態予測(第三報)2021

    • Author(s)
      今泉圭隆、黒田啓介、櫻井健郎、堀井勇一、大塚宜寿、西野貴裕
    • Organizer
      第29回環境化学討論会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 環状シロキサンに関する化学物質管理の動向と国内における河川水中濃度の比較2021

    • Author(s)
      堀井勇一、大塚宜寿、西野貴裕、櫻井健郎、今泉圭隆、黒田啓介
    • Organizer
      第55回日本水環境学会年会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 多媒体環境動態モデルによる水環境中の環状シロキサン(D4)の濃度予測2021

    • Author(s)
      黒田啓介、今泉圭隆、櫻井健郎、堀井勇一、大塚宜寿、西野貴裕
    • Organizer
      第55回日本水環境学会年会
    • Related Report
      2020 Annual Research Report
  • [Presentation] Multimedia environmental fate of volatile methylsiloxanes modeled in the Tokyo Bay catchment basin2020

    • Author(s)
      Yoshitaka Imaizumi, Takeo Sakurai, Keisuke Kuroda, Takehiko Hayashi, Noriyuki Suzuki
    • Organizer
      SETAC Europe 30th Annual Meeting
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Occurrence of methylsiloxans and total organic silicon in sediment around Tokyo bay, Japan2019

    • Author(s)
      Yuichi Horii, Nobutoshi Ohtsuka
    • Organizer
      39th International Symposium on Halogenated Persistent Organic Pollutants
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Methodologies used for environmental monitoring in different matrices2019

    • Author(s)
      Yuichi Horii
    • Organizer
      cVMS Analytical and Monitoring Information and Exchange Workshop
    • Related Report
      2019 Annual Research Report
    • Invited
  • [Remarks] 埼玉県環境科学国際センター 研究員紹介

    • URL

      https://www.pref.saitama.lg.jp/cess/torikumi/kenkyuin-list/horii-yuichi.html

    • Related Report
      2021 Annual Research Report 2020 Annual Research Report 2019 Annual Research Report

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Published: 2019-04-18   Modified: 2023-01-30  

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