改性废皮生物炭的制备及其对土壤碳封存的影响
Cheng Ji1, Tao E1, Ying Cheng2
1Liaoning Key Laboratory for Chemical Clean Production, Liaoning Key Laboratory for Surface Functionalization of Titanium Dioxide Powder, Institute of Ocean Research, Institute Environmental Research, College of Chemistry and Material Engineering, Bohai University, Jinzhou, 121013, Liaoning, China.
Environmental research
|January 14, 2024
概括
修饰生物炭 (Mn-BC) 通过稳定有机物质和促进有益细菌,有效地封存土壤碳. 这减少了碳损失和温室气体排放,改善了土壤健康和碳保留.
科学领域:
- 环境科学 环境科学
- 土壤科学 土壤科学
- 材料科学 材料科学 材料科学
背景情况:
- 土壤有机碳 (SOC) 矿化释放温室气体,降低土壤肥力.
- 有效的土壤碳捕集策略对于减缓气候变化至关重要.
- 生物炭是土壤修改的一个有希望的材料,但它的稳定性和有效性可以提高.
研究的目的:
- 开发和评估改性废皮生物炭 (Mn-BC),以改善土壤碳捕获.
- 研究Mn-BC降低SOC矿化并增强碳保留的机制.
- 评估Mn-BC对土壤微生物群落结构和功能的影响.
主要方法:
- 通过浸和热解来制备Mn-BC.
- 分析Mn-BC表面功能组和化学结构 (例如,Mn-O-C,CC,二烯-N键).
- 化实验用于测量SOC矿化率 (二氧化碳排放) 和总有机碳 (TOC) 含量.
- 土壤微生物社区分析,以确定细菌群体的变化.
主要成果:
- Mn-BC形成导致生物炭表面的MnSO4,通过CO和Mn-O-C键促进碳的保留.
- 通过结合结构保持生物碳稳定性,使碳封存含量增加到25.63%.
- 应用Mn-BC使SOC矿化率降低到0.48毫克CO2/天,并使TOC含量增加到48.16%.
- Mn-BC的应用调节了微生物群落,有利于稳定,碳占主导地位的细菌 (Firmicutes).
结论:
- 基改性废皮生物炭 (Mn-BC) 是一种有效的材料,可以增强土壤的碳捕获.
- Mn-BC通过特定的化学键和结构稳定性减轻SOC矿化和温室气体排放 (CO2,SO2).
- 应用Mn-BC促进了有益的土壤微生物社区结构,有利于长期储存碳.
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