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Comparison of reactions with different calcium sources for CaCO 3 production using carbonic anhydrase
Author(s) -
Moon Dea Hyun,
Eu Jun,
Lee Wonhee,
Kim Young Eun,
Park Ki Tae,
Ko You Na,
Jeong Soon Kwan,
Youn Min Hye
Publication year - 2020
Publication title -
greenhouse gases: science and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.45
H-Index - 32
ISSN - 2152-3878
DOI - 10.1002/ghg.2007
Subject(s) - vaterite , calcium carbonate , calcite , solubility , chemistry , calcium , carbonic anhydrase , mineralization (soil science) , inorganic chemistry , reaction rate , carbonate , mineralogy , nuclear chemistry , nitrogen , enzyme , biochemistry , catalysis , organic chemistry , aragonite
In this study, we investigated the effect of calcium sources with different solubilities and the carbonic anhydrase (CA) enzyme on carbonate mineralization reaction, and analyzed the reaction rate, the morphology of the formed precipitate, and the surface. The CO 2 mineralization rate was affected by the rate of CO 2 hydration and the rate of Ca ionization. For all of the calcium sources tested, CA improved the overall carbonate mineralization rate, but depending on the solubility of each calcium source, the reaction rates were in the order of CaCl 2 > Ca(OH) 2 > CaO. From CaCl 2 , calcium carbonate was generated rapidly. This was due to the high concentration of calcium ions in the solution because it was easily dissolved. But because of its high surface energy, calcite and vaterite coexisted. On the other hand, Ca(OH) 2 and CaO had relatively low solubility and the rate of calcium carbonate production was slow, but after the reaction, CaCO 3 with a calcite structure was formed. © 2020 Society of Chemical Industry and John Wiley & Sons, Ltd.