RPO-<sup>14</sup>C技术及其在有机地球化学研究上的应用

马海悦; 包锐

doi:10.16562/j.cnki.0256-1492.2024010802

RPO-¹⁴C技术及其在有机地球化学研究上的应用

马海悦,
包锐^,

中国海洋大学海洋化学理论与工程技术教育部重点实验室，青岛 266100

基金项目: 国家自然科学基金项目“基于单体分子化合物碳-14技术的边缘海有机碳转化、迁移与埋藏过程研究”（42076037）；中央高校基本科研业务费专项资金（2020042010）

详细信息

作者简介: 马海悦（1999—），女，硕士研究生，主要从事边缘海有机碳埋藏研究，E-mail：mahaiyue@stu.ouc.edu.cn

通讯作者: 包锐（1982—），男，博士，教授，主要从事海洋碳-14有机地球化学、海洋碳循环研究，E-mail：baorui@ouc.edu.cn

中图分类号: P736

收稿日期: 2024-01-08

修回日期: 2024-01-29

刊出日期: 2025-06-28

Research topics about RPO-¹⁴C and application in organic geochemistry

MA Haiyue,
BAO Rui^,

Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao 266100, China

More Information

Corresponding author: BAO Rui, baorui@ouc.edu.cn

Received Date: 08 January 2024

Revised Date: 29 January 2024

Publish Date: 28 June 2025

摘要

摘要:
基于沉积物样品的热稳定性进行分析和表征是稳定有机碳性质研究的常用方法，反映和重建了有机碳在环境中的演化和循环过程。热裂解/氧化（Ramped Pyrolysis/Oxidation，RPO）-¹⁴C分析技术及其应用是目前有机地球化学研究的前沿领域，也是研究沉积物有机碳埋藏与保存过程的有效方法。本文初步介绍了RPO-¹⁴C分析的测试方法和基本原理，阐述了热裂解/氧化及¹⁴C分析的装置细节，指出了包括装置改造、温度控制等在内的技术改进及与不同方法的联用拓展。RPO-¹⁴C分析技术在有机地球化学领域的沉积物研究方面得到了较广泛的应用：① 揭示有机碳迁移、改造和保存机制；② 改进沉积物年代学；③ 示踪沉积物记录的环境污染。RPO-¹⁴C能够对不同热稳定性有机碳进行高效分离，因此沉积物有机碳在自然环境中产生、迁移、改造、埋藏的过程能够借助热解特征得以重建，进而反演和评估全球范围内的有机碳循环机制和碳汇格局。最后，总结了该技术在海洋有机碳表征方面的应用前景及未来发展方向，对未来在更广泛的研究区域开展相关研究具有启示意义。
- 热裂解/氧化 /
- 沉积物 /
- 有机碳 /
- ¹⁴C /
- 碳循环
Abstract:
The analysis and characterization of organic carbon properties based on thermal stability is a widely-used method in studying the evolution and cycling of organic carbon in the environment. Ramped pyrolysis/oxidation (RPO)-¹⁴C technology is currently at the forefront of organic geochemistry research and is an effective approach for studying the burial and preservation of organic carbon in sediments. At present, the improvement and development of RPO-¹⁴C technology has provided a new tool for understanding the organic carbon conversion mechanism in organic geochemistry. Therefore, it is necessary to summarize systematically the progress and research significance of RPO-¹⁴C technology. In this paper, we introduced the test method and basic principle of RPO-¹⁴C analysis, described the details in device of ramped pyrolysis/oxidation and ¹⁴C analysis equipment, proposed technical improvement including device modification and temperature control, and pointed out the extension of combined use with different methods for analysis. In addition, we reviewed its applications in the research into sediments on the topics of: the mechanism of organic carbon transformation and preservation, the advancement in sediment chronology, and the tracing of environmental pollution recorded in sediments. The processes from generation, migration, transformation, to burial of sediment organic carbon in natural environment can be reconstructed with the help of efficient separation based on pyrolysis characteristics, to invert and assess the organic carbon cycle mechanism and carbon sink pattern on a global scale. This study provided an overview of the application potential and future directions of RPO-¹⁴C technology in characterizing marine organic carbon to inspire future research in various fields.
- ramped pyrolysis/oxidation /
- sediment /
- organic carbon /
- ¹⁴C /
- carbon cycle

HTML全文

图 1 热裂解/氧化及气体收集系统装置

Figure 1.

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图 2 RPO谱图结果及对应碳同位素组成 ^[33]

Figure 2.

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图 3 不同特征有机碳RPO谱图及双峰相对高度示意

Figure 3.

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图 4 全岩沉积物样品及不同粒度组分的¹⁴C年龄热解谱图 ^[59]

Figure 4.

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图 5 RPO谱图及根据阿伦尼乌斯公式衍生的活化能概率密度分布

Figure 5.

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