期刊
出版社
ELSEVIER
DOI: 10.1016/j.nimb.2022.10.026
关键词
Carbon mineralization; Radiocarbon; Mine tailings; Carbon sequestration
Carbon mineralization is a process that can sequester atmospheric CO2 and mitigate climate warming. This study explores the use of radiocarbon dating to verify that the carbon incorporated into carbonate minerals during mineralization is indeed atmospheric in origin. The results demonstrate the effectiveness of this technique for verifying atmospheric carbon reduction.
Sequestration of atmospheric CO2 is required to constrain the warming of Earth's climate. Carbon mineralization refers to the precipitation of carbonate minerals by reaction of CO2 and Mg- and Ca-rich rocks; if the source of the CO2 is atmospheric and the precipitated carbonate is protected from subsequent dissolution, this process at sufficient scale may be able to reliably draw down atmospheric greenhouse gas levels. Such reactions occur passively in ultramafic settings and previous work has demonstrated that they actively draw down local CO2(g) concentrations. However, a method for unambiguously attributing the sequestered carbon solid product to atmospheric sources is still lacking. Here, we test if radiocarbon can be used to verify that the carbon being incorporated into carbonate minerals during carbon mineralization is atmospheric in origin. Samples from recently exposed ultramafic sites are analyzed and the results demonstrate the utility of this technique for verifying true atmospheric carbon reduction.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据