A study on chemical and biological oxygen consumption of the seabed sediment under the hypoxic condition

缺氧条件下海底沉积物化学和生物耗氧量的研究

• 批准号: 24760400
• 负责人: ENDO Toru
• 金额: $ 2.83万
• 依托单位: Osaka City University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Young Scientists (B)
• 财政年份: 2012
• 资助国家: 日本
• 起止时间: 2012-04-01 至 2014-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-24760400/
• 关键词: 堆積物の酸素消費; 有機物分解; 水中二酸化炭素濃度; 生物的酸素消費; 化学的酸素消費; 堆積物; 水中二酸化炭素濃度の計測

It is important to understand each factors of sediment oxygen consumption in order to improve hypoxia at sea bottom in enclosed coastal seas. The purpose of this study was to separate biological factor from sediment oxygen consumption (SOC) by examining DO consumption and CO2 production associated with organic matter decomposition. A CO2 meter in water using water-resistant breathable tube was developed and laboratory experiments were conducted for verification of the effective of this method. First, we measured the time variations of CO2 concentration in water altered by controlling pH, by aerating and by adding soda, and checked the measuring precision and responsivity of this measuring method. Next, we recognized the biological reaction of SOC from relation between CO2 production and DO consumption by measuring the time variations of CO2 and DO concentrations in water above sediment at the same time.

了解沉积物耗氧量的各个因素对于改善封闭近海海底缺氧状况具有重要意义。本研究的目的是通过检查与有机物分解相关的 DO 消耗和 CO2 产生，将生物因素与沉积物耗氧量 (SOC) 分开。研制了一种采用防水透气管的水中CO2测量仪，并进行了室内实验，验证了该方法的有效性。首先，我们测量了通过控制pH、通气和添加苏打改变的水中CO2浓度的时间变化，并检查了该测量方法的测量精度和响应度。接下来，我们通过同时测量沉积物上方水中CO2和DO浓度的时间变化，从CO2产生和DO消耗之间的关系认识到SOC的生物反应。

项目成果

通気性撥水チューブを用いた水中二酸化炭素濃度の計測手法の有効性検証

验证使用透气防水管测量水中二氧化碳浓度的方法的有效性

• 发表时间: 2013
• 作者: 遠藤徹;田中俊行;大谷壮介;藤田哲朗;矢持進
• 通讯作者: 矢持進