FATE OF TOXIC CHEMICALS INFLOWED FROM WATERSHED IN COASTAL ENVIRONMENTS

从沿海环境流域流入的有毒化学品的归宿

• 批准号: 11680531
• 负责人: FUKUSHIMA Takehiko
• 金额: $ 2.3万
• 依托单位: Hiroshima University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1999
• 资助国家: 日本
• 起止时间: 1999 至 2001
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-11680531/
• 关键词: PAHs; Coastal environment; Toxic chemicals; Risk analysis; Photolysis; Runoff; 沿岸生態系; 下水処理場

(1) Dynamics of dissolved organic matter in rivers, estuaries and coastal regionsThe dynamics of dissolved organic matter (DOC), e.g. production, decomposition, transformation, were discussed on the basis of the results obtained by the field surveys with chemical fractionation and biodegradation tests.(2) Photolysis of PAHs in ground surfacesSeasonal changes in the photolysis rates of suspended and deposited particles were measured, suggesting the importance of photolysis in the dynamics of PAHs (Polycyclic Aromatic Hydrocarbons) in watersheds.(3) Prediction of toxic chemicals in waters and sedimentsSimple models were proposed to predict the concentrations of toxic chemicals in waters and sediments, indicating fairly good predictability.(4) Dynamics of PAHs in Hiroshima Bay and its watershedAlmost all the deposited PAHs on the ground surfaces could be run off through rainfall. The predicted PAHs concentrations based on the dry deposition rates and river inflow rates were in good accordance with the observed ones. The accumulation of PAHs in the brain and the organs of generation was found for the fish captured in Hiroshima Bay. The risk due to PAHs was evaluated to be rather high for the ecosystem of Hiroshima Bay.

(1)河流、河口和沿海地区溶解有机质的动态(1)溶解有机质(DOC)的产生、分解、转化等动态。(2)地表多环芳烃(PAHs)的光解测定了悬浮物和沉淀物光解速率的季节变化，表明光解在流域多环芳烃(PAHs)动态变化中的重要性。(3)水和沉积物中有毒化学物质的预测广岛湾及其分水岭中多环芳烃的动态变化几乎所有沉积在地面上的多环芳烃都可以通过降雨流失。根据干沉降率和河流入海率预测的多环芳烃浓度与实测值吻合较好。在广岛湾捕获的鱼在大脑和生殖器官中发现了多环芳烃的积累。据评估，多环芳烃对广岛湾生态系统的风险相当高。

项目成果

尾崎則篤: "市街北への多環芳香族炭化水素類の地表面堆積とその降雨時流出"環境工学研究論文集. 37. 403-409 (2000)

Noriatsu Ozaki：“城市北部多环芳烃的地表沉积及其降雨期间的径流”《环境工程研究杂志》37. 403-409（2000）。

嶋津治希: "有害化学物質め水中濃度と底質中濃度の関係"水環境学会誌. 23. 786-794 (2000)

Haruki Shimazu：“水和沉积物中有害化学物质浓度的关系”日本水环境学会杂志 23. 786-794 (2000)。

N.Ozaki: "Photoreactivity of PAHs on ground surface of urban site."Proc.Asian Waterqual-2001. 1. 391-396 (2001)

N.Ozaki：“城市场地地面上多环芳烃的光反应性。”Proc.Asian Waterqual-2001。

T. Fukushima: "Characterization of aquatic dissolved organic matter using EEMs, (in Japanese with English abstract)"J. JSWE. 24. 686-692 (2001)

T. Fukushima：“利用 EEM 表征水生溶解有机物，（日文，英文摘要）”J。

N.Ozaki: "Atomospheric deposition of PAHs on urban area and their runoff."Proceedings of 5^<th> International Conference Diffuse/Nonpoint Pollution and Watershed Management. (CD-ROM). (2001)

N.Ozaki：“城市地区多环芳烃的大气沉积及其径流。”第五届扩散/非点污染与流域管理国际会议论文集。