Department of Earth Sciences, University of Torino, Via Valperga Caluso, 35, 10125 Torino, Italy.
Department of Earth Sciences, University of Torino, Via Valperga Caluso, 35, 10125 Torino, Italy.
Sci Total Environ. 2019 May 20;666:1232-1244. doi: 10.1016/j.scitotenv.2019.02.114. Epub 2019 Feb 17.
The increase in the amount of carbon dioxide (CO) emissions related to many anthropic activities is a persistent and growing problem. During the last years, many solutions have been set out, none of them being the ultimate one. Investigators agree on the need of a synergic approach to the problem, in terms of many complementary methods of sequestration that, combined with the reduction of production, will be able to decrease the concentration of the CO in the atmosphere. In this work, we explore the use of a green reaction to trap the CO into a stable crystalline phase (weddellite) resorting to a multidisciplinary approach. CO is reduced and precipitated as calcium oxalate through vitamin C as a sacrificial reductant. Calcium oxalate crystals obtained show a startling good quality that increases their already great stability over a wide chemical and physical conditions' range.
与许多人为活动相关的二氧化碳（CO）排放量的增加是一个持续且不断增长的问题。在过去的几年中，已经提出了许多解决方案，但没有一个是最终的解决方案。研究人员一致认为，需要采取协同方法来解决这个问题，即采用多种互补的封存方法，结合减少生产，将能够降低大气中 CO 的浓度。在这项工作中，我们探索了使用绿色反应将 CO 捕获到稳定的结晶相中（水合草酸钙）的方法，采用了多学科的方法。CO 通过维生素 C 作为牺牲还原剂被还原并沉淀为草酸钙。获得的草酸钙晶体表现出惊人的高质量，这增加了它们在广泛的化学和物理条件范围内已经很高的稳定性。
