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DOI : 10.17640/KSWST.2023.31.3.125 , Vol.31, No.3, 125 ~ 136, 2023
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| Title |
| Development and Optimization of Nanobubble Carbon Dioxide Dissolved Concrete Mixing Water Production Technology for the Manufacture of Eco-Friendly Carbon Eating Concrete |
| 강찬솔 Chan Sol Kang , 장호종 Hojong Chang , 박정준 Jung Jun Park , 여우석 Wooseok Yeo , 김주현 Joo Hyun Kim , 김덕현 Deok-hyeon Kim , 김종규 Jong Kyu Kim |
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| Abstract |
| The construction sector generates a significant volume of domestic carbon dioxide(CO2) emissions, with most of the CO2 emitted during the cement manufacturing process. In an attempt to reduce the levels of CO2, technology that sequesters CO2 by injecting it as a gas into the concrete during the mixing and/or curing process has been developed as a means for permanent CO2 storage. However, the current range of applications for this strategy and the CO2 storage efficiency of concrete are low. In order to overcome these limitations, we developed a technology that can dissolve CO2 in water under normal conditions (i.e., without the need for pressure) using nanobubbles less than 200 nm in diameter. As a result of injecting CO2 into normal water and nanobubble water over 5 h, the maximum dissolved concentration of CO2 was observed for ordinary water, while 2,012 mg/L of CO2 was dissolved in the nanobubble water. How ever, when CO2 was injected into the nanobubble water under optimal conditions as determined using RSM-CCD analysis (i.e., a water temperature of 10℃, a pH of 11, a reaction time of 6 h , and a stirring speed of 20 RPM), 2,756 mg/L of CO2 was dissolved. As a result,it was demonstrated that CO2 can be successfully dissolved in water using nanobubbles under normal conditions. If nanobubble water in which CO2 has been dissolved is applied to other fields, CO2 levels can be reduced in an eco-friendly way, contributing to the realization of carbon-neutral goals. |
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| Key Words |
| Carbon Dioxide, Nanobubble, Dissolve in water, RSM-CCD, Optimization, 이산화탄소, 나노버블, 수중 용해, 반응표면분석법-중심합성설계, 최적화 |
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