吸附到生物炭修改土壤的动力学
1Food Animal Environmental System Research Unit, US Department of Agriculture - Agricultural Research Service, Bowling Green, KY, 42104, United States.
Chemosphere
|October 25, 2023
概括
将铁涂层生物炭 (BCFe) 添加到土壤中,显著改变了 (P) 吸附动力学,影响因土壤类型而异. 没有修改的生物炭 (BC) 对P吸附动态的影响很小.
科学领域:
- 土壤科学 土壤科学
- 环境化学环境化学
- 生物地质化学生物地质化学
背景情况:
- 生物炭是一种潜在的土壤修改剂,可以增强 (P) 吸收.
- 对生物炭的氧化铁 (Fe) 涂层可以增加P吸收,但其在土壤中的动力效应尚不清楚.
研究的目的:
- 在四种具有对比性质的土壤中研究P吸附的动力学,这些土壤中修改了未经修改的生物炭 (BC) 和涂有Fe的生物炭 (BCFe).
- 确定BC和BCFe对P吸附量和随时间推移的动态行为的影响.
主要方法:
- 四种具有不同质地和表面特性的土壤被修改为5% (w/w) BC或BCFe.
- 酸吸附测量在化时间从1到314小时.
- 用五种动力模型来评估生物炭修改的影响,调配了吸数据.
主要成果:
- 没有修改的生物炭 (BC) 在所有土壤中对P吸收的影响很小.
- 涂有Fe的生物炭 (BCFe) 在低P吸收土壤中显著增加了P吸收,但在高P吸收土壤中显示出低于预期的增加.
- 动力模型参数在所有四种土壤中都受到BCFe的显著改变,在两个土壤中受到BC的显著改变.
结论:
- 涂有Fe的生物炭显示了增强P吸收的潜力,但其有效性取决于土壤.
- 添加BCFe显著改变了修改土壤中P吸附的动力学.
- 这项研究为了解生物炭-土壤-P相互作用提供了关键的动力学数据.
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