氧气有限热解和焚烧对生物炭运输的影响
Yuzhen Chen1,2, Yan Tan1,2, Lezhu Su1,2
1Hunan Engineering Research Center for Biochar, Hunan Agricultural University, Changsha, 410128, China.
Environmental science and pollution research international
|September 14, 2023
概括
这项研究比较了氧气有限的热溶性生物炭和传统的生物炭运输. 由于表面积更大, Pyrolytic 生物炭表现出更强的保留力,而传统生物炭表现出更大的初始流动性.
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:
- 生物炭运输研究往往忽视了传统的焚烧产生的生物炭,与氧气有限的火溶性生物炭不同.
- 了解生物炭运输对于评估其环境命运和风险至关重要.
研究的目的:
- 调查和比较氧气有限的热溶性生物炭和传统生物炭的运输和保留机制.
- 阐明生物炭特性和环境条件对它们在多孔介质中的运动的影响.
主要方法:
- 对三种氧气有限的火溶性生物炭类型和三种传统的生物炭类型进行比较分析.
- 在和多孔介质中运输和保留的研究.
- 在不同的pH值和离子强度下测量特定表面积和泽塔潜力.
主要成果:
- 氧气有限的火解生物炭具有比传统生物炭 (50-60 m2·g-1) 更高的特定表面积 (180-200 m2·g-1).
- 热溶性生物炭表现出强大的保留能力和低透性 (<0.1),而传统生物炭显示出更高的移动性 (峰值透率为0.16).
- 所有生物炭的泽塔潜力取决于pH值和离子强度,在酸性或高离子强度条件下导致沉积趋势.
结论:
- 生物炭类型显著影响其在多孔介质中的运输和保留.
- 特定的表面积和泽塔潜力是控制生物炭流动性的关键因素.
- 这项研究为评估与不同类型的生物炭相关的环境风险提供了见解.
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