Microscale Spatiotemporal Variation of Reactive Oxygen Species in the Charosphere: Underlying Formation Mechanism and Their Role in CO2 Emission DOI
Huiqiang Yang, Na Chen, Kangjie Yang

и другие.

Environmental Science & Technology, Год журнала: 2025, Номер unknown

Опубликована: Янв. 23, 2025

Charosphere, a highly active zone between biochar and surrounding soil, is widely present in agricultural wildfire-affected soils, yet whether reactive oxygen species (ROS) are produced within the charosphere remains unclear. Herein, production spatiotemporal evolution of ROS were explored. In situ capture visualized gradual decrease with increasing distance from biochar/soil interface. Temporally, O2•- H2O2 contents initially increased then declined incubation time, peaking at 3.04 5.40 μmol kg-1, respectively, while •OH content decreased continuously. High-throughput sequencing revealed that dissolved (DBC) facilitated by promoting growth bacteria electron-releasing capacity, such as Bacteroidetes, Acidobacteria, Actinobacteria, Chloroflexi. Additionally, adding electron transfer-weakened DBC significantly (ANOVA, P < 0.05), demonstrating also served shuttle electron-storing materials to promote accelerating transfer. This was further confirmed via fluorescence imaging, which visually showed stronger transfer ability near soil/biochar surface. Inhibition isotope experiments critical role CO2 emissions, primarily soil organic carbon. study highlights prevalent overlooked hotspot, advancing our understanding carbon turnover soils.

Язык: Английский

Microscale Spatiotemporal Variation of Reactive Oxygen Species in the Charosphere: Underlying Formation Mechanism and Their Role in CO2 Emission DOI
Huiqiang Yang, Na Chen, Kangjie Yang

и другие.

Environmental Science & Technology, Год журнала: 2025, Номер unknown

Опубликована: Янв. 23, 2025

Charosphere, a highly active zone between biochar and surrounding soil, is widely present in agricultural wildfire-affected soils, yet whether reactive oxygen species (ROS) are produced within the charosphere remains unclear. Herein, production spatiotemporal evolution of ROS were explored. In situ capture visualized gradual decrease with increasing distance from biochar/soil interface. Temporally, O2•- H2O2 contents initially increased then declined incubation time, peaking at 3.04 5.40 μmol kg-1, respectively, while •OH content decreased continuously. High-throughput sequencing revealed that dissolved (DBC) facilitated by promoting growth bacteria electron-releasing capacity, such as Bacteroidetes, Acidobacteria, Actinobacteria, Chloroflexi. Additionally, adding electron transfer-weakened DBC significantly (ANOVA, P < 0.05), demonstrating also served shuttle electron-storing materials to promote accelerating transfer. This was further confirmed via fluorescence imaging, which visually showed stronger transfer ability near soil/biochar surface. Inhibition isotope experiments critical role CO2 emissions, primarily soil organic carbon. study highlights prevalent overlooked hotspot, advancing our understanding carbon turnover soils.

Язык: Английский

Процитировано

0