The role of marine photochemical reactions in removal of dissolved material in the Yellow Sea

海洋光化学反应在去除黄海溶解物质中的作用

• 批准号: 13574016
• 负责人: OHTA Keiichi
• 金额: $ 8.77万
• 依托单位: University of Shiga Prefecture (2003)Nagoya University (2001-2002)
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2001
• 资助国家: 日本
• 起止时间: 2001 至 2003
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-13574016/
• 关键词: photochemical reactions; the Yellow; dissolved materials; degradation; material removal; 海洋観察; 溶存腐植物質; 溶存気体; 除去過程; 観測

The Yellow Sea is one of coastal marine areas where inflows and removal of natural and anthropogenic material are most active in the world. In order to evaluate the role of photochemical reactions in removing dissolved matter in water, we conducted field observations and simulation experiments as follows.1.Satellite observation (SeaWiFS Level 3 data) for the distribution of terrestrial humic substances in the Yellow Sea and East China Sea.2.Field observations by the research vessels of Korea Ocean Research and Development Institutes in the Yellow Sea in 2001 and 2002.3.Field observations in the Seto Inland Sea and surrounding rivers to compare the material dynamics with the Yellow Sea.4.Photochemical experiments using sun and artificial lights to simulate photoreactions in the Yellow Sea.Following results were obtained from the above-described observations and experiments.1.The humic concentrations in the Yellow Sea decrease with the distance from the coast, showing lower levels in summer than autumn.2.Similar features are observed in the Seto Inland Sea, suggesting the dilution and photoreactions should affect humic distribution in water.3.Distribution patterns of carbon monoxide and hydrogen peroxide clearly supported the photochemical reactions to proceed in water.4.Organic compounds with unknown structures were suggested to be responsible for OH radical generation in the Yellow Sea.

黄海是世界上自然和人为物质流入和迁移最活跃的沿海海区之一。为了评估光化学反应在去除水中溶解物质中的作用，我们进行了如下的野外观测和模拟实验：1.卫星观测（SeaWiFS Level 3数据）2.2001年韩国海洋研究开发院的调查船在黄海和东海进行了现场观测，2002.3.在濑户内海及周边河流中进行现场观测，以比较物质动力学与黄海的差异。4.利用太阳光和人工光源模拟黄海的光化学反应。通过上述观测和实验，得到以下结果：1.黄海的腐殖酸浓度随着离海岸的距离而降低，夏季比秋季低。2.在濑户内海也观察到类似的特征，3.一氧化碳和过氧化氢的分布模式明显支持水中的光化学反应; 4.提出了一些结构未知的有机化合物黄海中OH自由基的产生主要是由海水中的氧自由基引起的。

项目成果

Takeda, K., H.Takedoi, S.Yamaji, K.Ohta, H.Sakugawa: "Determination of hydroxyl radical photoproduction rates in natural waters."Analytical Sciences. 20. 153-158 (2004)

Takeda, K.、H.Takedoi、S.Yamaji、K.Ohta、H.Sakukawa：“天然水中羟基自由基光产生速率的测定”。分析科学。

Ohta, K., H.Terai, I.Kimura: "Determination of reduced gases in water and air by gas chromatography with a semiconductor detector."Recent Res.Devel.Anal.Chem.. 1. 97-104 (2001)

Ohta, K., H.Terai, I.Kimura：“使用半导体检测器通过气相色谱法测定水和空气中的还原气体。”Recent Res.Devel.Anal.Chem.. 1. 97-104 (2001)

大田啓一: "海水の一酸化炭素と海洋光化学"月刊海洋. 号外・25. 36-41 (2001)

Keiichi Ota：“海水一氧化碳和海洋光化学”月刊额外 25. 36-41 (2001)。