研究課題/領域番号 |
22KJ1302
|
補助金の研究課題番号 |
22J12590 (2022)
|
研究種目 |
特別研究員奨励費
|
配分区分 | 基金 (2023) 補助金 (2022) |
応募区分 | 国内 |
審査区分 |
小区分64010:環境負荷およびリスク評価管理関連
|
研究機関 | 東京工業大学 |
研究代表者 |
GUO ZHONGYU 東京工業大学, 環境・社会理工学院, 特別研究員(DC2)
|
研究期間 (年度) |
2023-03-08 – 2024-03-31
|
研究課題ステータス |
交付 (2023年度)
|
配分額 *注記 |
1,700千円 (直接経費: 1,700千円)
2023年度: 800千円 (直接経費: 800千円)
2022年度: 900千円 (直接経費: 900千円)
|
キーワード | photochemistry / photolysis / reactive intermediates / dissolved organic matter / reservoir / modeling / quantum yield / simulated sunlight |
研究開始時の研究の概要 |
Organic micropollutants like herbicides have been detected in reservoirs including Japan. Since reservoir is closely related to human health, it is important to know their persistence. Our study focus on indirect photolysis of pollutants in reservoirs which help us know the persistence of pollutants
|
研究実績の概要 |
50 reservoir samples and 7 lake and pond samples were taken across Japan from Okinawa to Hokkaido. The characterization of reservoir samples in terms of water chemistry and absorption spectra indicated that major variations in the dissolved organic matter (DOM) were molecular structures and compositions. Quantum yield for photo-production of singlet oxygen of the reservoirs are close to river and lakes dominated by terrestrial DOM but lower than water bodies dominated by microbial DOM.Linear (single and multiple) and non-linear models (machine-learning) were developed and can be used to estimate quantum yield with a high accuracy for reservoirs.In addition, the models can be additionally used for estimating quantum yidl in lakes, ponds, and referenced DOM samples.
|
現在までの達成度 (区分) |
現在までの達成度 (区分)
1: 当初の計画以上に進展している
理由
The research is on schedule and we have submitted the second paper to a high-level journal.Now the paper is under review.
|
今後の研究の推進方策 |
Since this reservoir only focus on reservoirs, or we can say freshwater system, it is necessary to generalize the model to a universal model that can be used also in seawater. However, in seawater, it contains salts which may influence the photo-production of reactive intermediates. Thus, future can pay attention to the effects of those salts on quantum yield for photo-production of reactive intermediates and modeify the model or develop a new model.
|