从老化生物炭中释放的溶解有机物质的表征:对两个原料和多种老化方法的比较研究
Yan Yue1, Leqi Xu2,3, Guitong Li2,3
1Engineering & Technology Center of Electrochemistry, School of Chemistry and Chemical Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China.
Molecules (Basel, Switzerland)
|June 10, 2023
概括
老化生物炭,特别是来自大豆和过氧化处理的生物炭,产生富含湿物质的溶解有机物质 (DOM). 这种老化的生物炭DOM可能会影响土壤污染物的流动性和毒性.
科学领域:
- 环境科学 环境科学
- 土壤科学 土壤科学
- 生物地质化学生物地质化学
背景情况:
- 溶解有机物 (DOM) 在环境生态系统中至关重要.
- 关于老化生物炭性质的研究广泛,但来自老化生物炭的DOM仍未得到充分研究.
- 了解老化生物炭DOM是预测其环境命运的关键.
研究的目的:
- 为了描述来自老化生物炭的溶解有机物 (DOM).
- 为了研究老化条件 (土壤溶液,H2O2) 对生物炭DOM成分的影响.
- 评估生物炭来源 (玉米茎,大豆) 对DOM属性的影响.
主要方法:
- 来自玉米茎和大豆的生物炭使用农田/蔬菜土壤溶液和H2O2丰富的土壤溶液老化.
- 提取的DOM被分析使用刺激-发射矩阵与光区域集成 (FRI) 和并行因子分析 (PARAFAC) 相结合.
- 分析的关键参数包括水溶性有机碳,类似湿的成分,芳香度,湿度和分子量.
主要成果:
- 用H2O2丰富的土壤溶液老化显著增加水溶性有机碳 (147.26-734.13%).
- FRI揭示了富尔维克和胺类有机物作为主要成分,胺类物质大幅增加 (57.48-235.96%),特别是在大豆草生物炭中.
- 帕拉法克 (PARAFAC) 确定了四种类似的成分,而老化的生物炭DOM显示了增加的芳香度和化,分子重量降低.
结论:
- 来自老化生物炭的DOM的特点是含有高含量的化物类有机物.
- 老化条件,特别是H2O2处理,显著改变生物炭DOM的组成和特性.
- 老化生物炭DOM的特征表明,它可能对土壤污染物的流动性和毒性产生影响.
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