结增强了含有Ca2+的溶液中的CO2矿化
Minghao Sun1, Dong Gao2, Bowen Li3
1"The Belt and Road Initiative" Advanced Materials International Joint Research Center of Hebei Province, School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300401, People's Republic of China.
概括
冷通过加快大气中的二氧化碳 (CO2) 在矿物质丰富的水中被捕获来增强自然的碳汇. 这种由冰晶形成驱动的低温矿化过程对于准确的全球碳预算模型至关重要.
科学领域:
- 环境科学 环境科学
- 地质化学 地质化学
- 气候科学 气候科学
背景情况:
- 自然的碳汇是全球碳预算的重要组成部分.
- 了解影响碳捕获的因素对于减缓气候变化至关重要.
研究的目的:
- 研究结过程在天然碳汇中的作用.
- 为了确定结如何影响大气二氧化碳的封存和矿化.
主要方法:
- 结实验是对Ca(OH) 2,NaCl-CaCl2和人造海水的溶液进行的.
- 分析的重点是结条件下的CaCO3晶体的核和生长过程.
主要成果:
- 结显著增强了矿物离子丰富的水系统中的二氧化碳封存/矿化.
- 冷通过增加冰边界内的超和,加速了CaCO3晶体核形成.
- 解后的晶体生长发生在没有能量屏障的情况下.
结论:
- 结过程是自然碳汇的一个重要,以前被忽视的因素.
- 低温矿化增强了二氧化碳的封存,应该纳入气候模型.
- 目前的全球碳预算模型可能低估了封存,因为没有结冰效应.
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