ウルトラファインバブルを用いた水中への二酸化炭素の固定化

抄録

Carbon dioxide (CO₂) gas was fixed in ultrafine bubble (UFB) water. Two methods were used to fix CO₂ gas in this research. One method involved blowing CO₂ gas into the UFB water. In this method, the CO₂ gas concentration was either 21 % or 100 %. This method was called the blowing method. The other method involved preparing the UFB water while contacting it with CO₂ gas. This method was called the contacting method. Calcium hydroxide was added to the UFB water to determine the amount of CO₂, and calcium carbonate was formed as a result. The volume of fixed CO₂ was calculated using thermogravimetric analysis of the samples. Both methods successfully fixed CO₂ in the UFB water. For 500 cm³ of the UFB water, the blowing method with 100 % CO₂ gas fixed up to 453 cm³ of CO₂. Additionally, the volume of CO₂ fixed by the contacting method was 192 cm³. The UFB water prepared by the contacting method retained CO₂ for a longer time compared to the blowing method.