在非热等离子体处理过程中,土壤溶解有机物 (SDOM) 的分子组成发生变化
Zining Li1, Zhuyu Sun2, Lulu Chen1
1College of Environmental Science and Engineering, Donghua University, Shanghai, 201620, China.
Environmental research
|January 8, 2026
概括
非热等离子体 (NTP) 处理改变了土壤溶解有机物 (DOM) 的结构,最初将其碎片化,然后形成富含的化合物. 最佳的NTP持续时间提高了土壤健康和微生物活动,而长时间的处理可能会形成耐火化合物.
科学领域:
- 环境化学环境化学
- 土壤科学 土壤科学
- 血科学是一门科学课.
背景情况:
- 非热等离子体 (NTP) 是一种用于土壤修复的新技术.
- 了解NTP对土壤溶解有机物 (DOM) 的影响对于评估土壤健康至关重要.
- 之前的研究还没有完全阐明在NTP治疗期间DOM的分子转化.
研究的目的:
- 系统地研究在介电屏障放电 (DBD) 处理下土壤DOM的结构演变.
- 阐明在NTP土壤修复过程中推动DOM变化的分子机制.
- 制定指导方针,以优化NTP处理时间,以改善土壤和土壤健康.
主要方法:
- 介电屏障放电 (DBD) 用于NTP处理土壤.
- 使用了一系列互补的分析技术:UV-Vis,FTIR,2D-COS,3D-EEM和FT-ICR-MS.
- 描述的重点是DOM度,芳香度,分子量,功能组和阴离子调动.
主要成果:
- DOM度增加了八倍,芳香度和分子量呈U形趋势.
- FTIR和FT-ICR-MS显示了初始的氧化碎片,随后是合和凝结.
- 最佳处理 (2-20分钟) 产生了可生物降解的DOM,增强了植物发芽和微生物活动,而长时间处理则形成了反化合物.
- NTP处理显著调动了土壤,特别是Ca2+,与DOM氧化相关.
结论:
- NTP处理会导致土壤DOM的复杂结构和分子变化.
- 处理时间对于控制DOM生物降解性和防止耐火化合物形成至关重要.
- NTP为土壤整治提供了一个有前途的途径,通过仔细的优化,平衡整治效率和土壤健康保护.
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