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Article

Characteristics of Carbonate Formation from Concentrated Seawater Using CO2 Chemical Absorption Methodology

1
Center for Carbon Mineralization, Korea Institute of Geoscience and Mineral Resources (KIGAM), 124 Gwahang-no, Yuseong-gu, Daejeon 34132, Korea
2
Earth and Environmental Analysis Group, Korea Basic Science Institute (KBSI), 162, Yeongudanji-ro, Ochang-eup, Cheongwon-gu, Cheongju-si, Chungcheongbuk-do 28119, Korea
*
Author to whom correspondence should be addressed.
Int. J. Environ. Res. Public Health 2021, 18(1), 120; https://doi.org/10.3390/ijerph18010120
Received: 6 November 2020 / Revised: 21 December 2020 / Accepted: 23 December 2020 / Published: 26 December 2020
(This article belongs to the Special Issue Environmental Waste Recycling)
Carbon capture and storage is a popular CO2-reduction technology, and carbon capture and utilization (CCU) technology has been reported frequently over the years. However, CCU has certain disadvantages, including the requirement of high energy consumption processes such as mineral carbonation. In addition, stable metal sources are required to fix CO2. This study used concentrated seawater to supply metal ions. In addition, the selected 5 wt % amine solution changed CO2 into aqueous CO2 to reduce the additional energy required to form the metal carbonate under moderate conditions. As a result, precipitates were formed because of the reaction of carbonate radicals with metal ions in the seawater. These precipitates were analyzed by X-ray diffraction and field-emission scanning electron microscopy, and they were found to mostly consist of CaCO3 and NaCl. Furthermore, it was verified that the conversion solution maintained its CO2-loading capacity even after the solids and liquid were filtered twice. Therefore, the proposed method permits a substantial reuse of CO2 and waste seawater when sufficient metal ions are supplied. Therefore, methods to improve their purity will be developed in future studies. View Full-Text
Keywords: CCS; CCU; CO2 fixation; CO2 conversion; recovery of valuable metals CCS; CCU; CO2 fixation; CO2 conversion; recovery of valuable metals
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MDPI and ACS Style

Park, S.; Bong, Y.-S.; Jeon, C.W. Characteristics of Carbonate Formation from Concentrated Seawater Using CO2 Chemical Absorption Methodology. Int. J. Environ. Res. Public Health 2021, 18, 120. https://doi.org/10.3390/ijerph18010120

AMA Style

Park S, Bong Y-S, Jeon CW. Characteristics of Carbonate Formation from Concentrated Seawater Using CO2 Chemical Absorption Methodology. International Journal of Environmental Research and Public Health. 2021; 18(1):120. https://doi.org/10.3390/ijerph18010120

Chicago/Turabian Style

Park, Sangwon, Yeon-Sik Bong, and Chi W. Jeon. 2021. "Characteristics of Carbonate Formation from Concentrated Seawater Using CO2 Chemical Absorption Methodology" International Journal of Environmental Research and Public Health 18, no. 1: 120. https://doi.org/10.3390/ijerph18010120

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