Environmental behaviors of microplastics in surface water of rivers and bays and predictions of future concentrations after the usage of alternatives of plastics
| Project/Area Number |
18K11683
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Review Section |
Basic Section 64010:Environmental load and risk assessment-related
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| Research Institution | Chiba Institute of Technology |
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Principal Investigator |
Kameda Yutaka 千葉工業大学, 創造工学部, 准教授 (60397081)
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| Co-Investigator(Kenkyū-buntansha) |
田代 豊 名桜大学, 国際学部, 教授 (20441959)
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| Project Period (FY) |
2018-04-01 – 2021-03-31
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| Project Status |
Completed (Fiscal Year 2020)
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| Budget Amount *help |
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2020: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2019: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2018: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
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| Keywords | マイクロプラスチック / 微細粒子 / 顕微FTIR / 河川 / 粒度分布 / AIST-SHANEL / 細粒化 / 微細マイクロプラスチック / 汚染特性 / シミュレーション / 台湾 / 下水処理場 / 浄水場 / 多摩川 / マイクロカプセル / 20μm未満 / 自動分析 / 鶴見川 / 沖縄 / 粒子数粒径分布 / 排出量原単位 / サンゴ礁 |
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| Outline of Final Research Achievements |
A novel method to measure microplastics greater than 20 micron in aquatic environment was established and their occurrences in surface water of Tsurumi river was investigated. The observed concentrations were several to 10 times higher than previous reports. This may be caused that their median sizes of the size distributions were approximately 50 micron, indicating that previous microplastics data greater than 330 micron was only a small part of all microplastics. The median sizes were correlated significantly to the tensile strengths of their virgin polymer. This is the important evidence that physically strong polymers can not be fragmentated easier than "soft" polymers.
On the other hand, microplastics concentrations were predicted in Tama river and Tsurumi river by using an AIST-SHANEL simulation model.
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| Academic Significance and Societal Importance of the Research Achievements |
環境中の20μm以上のマイクロプラスチックの調査分析方法を確立した。この点は学術的に解明すべき100μm以下のマイクロプラスチックの環境中挙動の解析に大きな貢献を果たすものと期待される。また、環境中マイクロプラスチックの調査は世界的にも技術的に困難であるが、システマティックな本手法により世界的に調査が促進されるものと考えられる。
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Report
(4 results)
Research Products
(52 results)
