黑碳在沉积老化过程中的稳定碳同位素变化研究

项目名称： 黑碳在沉积老化过程中的稳定碳同位素变化研究

项目编号： No.41473104

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 地质学

项目作者： 宋建中

作者单位： 中国科学院广州地球化学研究所

项目金额： 95万元

中文摘要： 黑碳(BC)在土壤/沉积环境中可以被缓慢地老化降解，对黑碳在老化降解过程中的稳定碳同位素变化进行研究具有重要的科学意义。在本课题中，申请者拟从3个方面系统地研究黑碳在老化降解过程中的稳定碳同位素变化：（1）黑碳在非生物降解过程中的稳定碳同位素变化，对影响黑碳降解的因素如黑碳特征、沉积条件等进行系统研究，弄清黑碳在非生物降解过程中的稳定碳同位素变化机制。（2）对黑碳在生物降解过程中的稳定碳同位素变化进行研究，了解黑碳在生物降解过程中的稳定碳同位素变化机制。（3）对黑碳在热老化过程中的稳定碳同位素进行研究，了解黑碳在热老化过程中的稳定碳同位素变化特征。最后通过对比分析黑碳在老化降解过程中的稳定碳同位素变化与化学性质结构的变化特征，弄清引起黑碳稳定碳同位素变化的原因。该研究将有助于我们了解黑碳在老化降解过程中的稳定碳同位素变化机制，为科学家更好地应用黑碳稳定碳同位素指标提供理论依据和数据支持。

中文关键词： 黑碳；稳定碳同位素；老化；降解

英文摘要： Black carbon (BC) can be slowly degradated in the natural environment. It is very important to investigate the stable carbon isotope changes of BC in the aging degradation process. In this project, the stable carbon isotope changes of BC in the aging process will be studied as follow: (1) to investigate the stable carbon isotope changes of BC in the abiotic processes. The degradation influencing factors such as the BC properties and the depositional conditions were systematically studied to clarify the stable carbon isotope changes mechanisms of BC in the abiotic processes. (2) to understand the stable carbon isotope changes mechanisms of BC in the biotic processes, the stable carbon isotope changes of BC in the biotic processes were systematically investigated. (3) to understand the stable carbon isotope changes of BC in the thermal aging process, the stable carbon isotope changes of BC in the thermal aging processes were systematically studied. Finally, the stable carbon isotope changes of BC and the chemical functional groups and structures of BC in the aging degradation process were contrastive analyzed to understand the reasons of the stable carbon isotope changes of BC in the aging process. This study are very helpful for us to understand the stable carbon isotope change mechanisms of BC in the aging process. The results would provide supports for better application of BC isotope indicators in the future.

英文关键词： Black carbon;stable carbon isotope;aging;degradation