|
| Mechanisms of soil minerals enhance biochar stability：A review |
| Received:November 08, 2022 |
| View Full Text View/Add Comment Download reader |
| KeyWord:mineral ion|mineral particle|biochar|stability|aggregate |
| Author Name | Affiliation | E-mail | | CHEN Quan | Yunnan Provincial Key Lab of Soil Carbon Sequestration and Pollution Control, Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, China | | | CHEN Lifang | Yunnan Provincial Key Lab of Soil Carbon Sequestration and Pollution Control, Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, China | | | WU Danping | Yunnan Provincial Key Lab of Soil Carbon Sequestration and Pollution Control, Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, China | | | WU Min | Yunnan Provincial Key Lab of Soil Carbon Sequestration and Pollution Control, Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, China | minwup@hotmail.com | | PAN Bo | Yunnan Provincial Key Lab of Soil Carbon Sequestration and Pollution Control, Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, China | |
|
| Hits: 1369 |
| Download times: 1443 |
| Abstract: |
| Biochar has received much attention due to its high stability in the environment, which makes it suitable for carbon sequestration and emission reduction. However, biochar is not completely inert. Its stability is determined by its chemical structure and the surrounding ecological system. To explore the stability of biochar and its carbon fixation potential under the action of soil minerals, this study elaborated on the mechanism of the interaction between biochar and mineral inorganic ions, the aggregation process of biochar and mineral particles, and systematically analyzed the influence of minerals on the biological stability of biochar. Mineral inorganic ions might interact with biochar through complexation, cation bridging, precipitation, and electrostatic attraction to form an organic -mineral complex, and mineral particles may aggregate with soil organic matter and biochar. These two forms might provide physical protection for biochar, thus improving its chemical stability. The distribution of biochar in aggregates changed over time. It mainly existed in silt and clay aggregates, and then distributed in micro-aggregates and macro-aggregates. The formation of aggregates limited the number and diversity of microorganisms, reduced the probability of contact between biochar and microorganisms, and slowed down the microbial degradation of biochar, thereby enhancing its biological stability. This paper discussed challenges to biochar stability and carbon fixation ability and provided a theoretical basis for future research. |
|
|
|
