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首页> 外文期刊>Crystal growth & design >Coral Mineralization Inspired CaCO3 Deposition via CO2 Sequestration from the Atmosphere
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Coral Mineralization Inspired CaCO3 Deposition via CO2 Sequestration from the Atmosphere

机译：通过大气中的CO2隔离，珊瑚矿化激发了CaCO3沉积

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摘要

We report coral-inspired calcium carbonate deposition via sequestration of CO2 directly from the atmosphere. We observed that a CaCl2 solution containing basic components and carbonic anhydrase induced aragonitic spherulites and acicular morphologies of CaCO3 at the air/solution interface, through the reaction of calcium ions with CO2 dissolved directly from the atmosphere; the resulting crystalline aragonite architectures were very similar to those in scleractinian corals. The addition of an anionic polymer enhanced deposition of CaCO3 at the air/solution interface, which was accompanied by morphological changes including coated spherulites; tabular, cone-shaped, and nanofibrillar calcites; and amorphous calcium carbonate, These architectures are abundant in corals in nature, and the results thus suggest that CaCO3 deposition via CO2 sequestration from the atmosphere, using a solution containing a basic component, carbonic anhydrase, and an anionic polymer, emulates coral mineralization. This study of abiotic mineralization can be used as a tool for understanding coral mineralization in nature, and also has implications for CO2 capture from the atmosphere.
机译：我们通过直接从大气中隔离二氧化碳报告了珊瑚激发的碳酸钙沉积。我们观察到，含有钙离子和碳酸酐酶的CaCl2溶液通过钙离子与直接从大气中溶解的CO2的反应，在空气/溶液界面上诱发了芳纶球晶和针状形态的CaCO3。由此产生的晶体文石结构与巩膜珊瑚中的晶体非常相似。阴离子聚合物的添加增强了CaCO3在空气/溶液界面的沉积，并伴随着形态变化，包括包覆的球晶;板状，锥形和纳米原纤维方解石;这些结构在自然界中的珊瑚中非常丰富，因此结果表明，使用含有碱性成分，碳酸酐酶和阴离子聚合物的溶液，通过从大气中隔离CO2来沉积CaCO3可以模拟珊瑚的矿化作用。这项关于非生物矿化的研究可以用作了解自然界中珊瑚矿化的一种工具，并且对从大气中捕获二氧化碳具有重要意义。

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