对葡萄园修剪废弃物生物炭的生产,表征和潜在用途的新见解
Eliana Cárdenas-Aguiar1, Gabriel Gascó2, Marcos Lado3
1Department of Agricultural Production, Universidad Politécnica de Madrid, Ciudad Universitaria, 28040 Madrid, Spain; Centro Interdisciplinar de Química e Bioloxía- CICA, As Carballeiras, s/n Campus de Elviña, Universidade da Coruña, 15008 Coruña, Spain.
Waste management (New York, N.Y.)
|October 6, 2023
概括
热解将葡萄园修剪废物转化为生物炭,温度显著影响pH和碳含量等特性. 居住时间也调节生物碳的特征,提供一种方法来定制它作为成长媒体组件的使用.
科学领域:
- 农业科学 农业科学
- 环境科学 环境科学
- 材料科学 材料科学 材料科学
背景情况:
- 葡萄园修剪废物 (VP) 提出了处置挑战和价值化的机会.
- 热解提供了一种将VP转化为生物炭的方法,这种材料具有潜在的土壤修改应用.
- 了解热解条件对生物炭特性的影响对于优化其使用至关重要.
研究的目的:
- 研究热解温度和停留时间对VP衍生生物炭的物理化学性质的影响.
- 评估这些生物炭对环境的影响和植物毒性.
- 为了确定VP生物炭作为生长媒介组件的适用性.
主要方法:
- 葡萄园修剪废物在300°C和600°C下进行了热解,1个小时和3个小时.
- 对生物炭特性进行了全面分析,包括pH,EC,灰含量,碳和营养分析,表面积,密度,多孔性和PAH度.
- 用发芽指数来评估植物毒性.
主要成果:
- 热解温度显著影响了生物炭的特性,增加了pH,EC,灰,碳含量,芳香度,表面积和中等度.
- 较高的温度降低了O/C和N/C比率,总N,P,Mg和PAH,使得水中可提取的有机碳 (WEOC) 显著减少.
- 停留时间的影响较弱,但影响了灰和固定碳含量,以及H/C和O/C比率,温度依赖的趋势.
结论:
- VP衍生生物炭具有有利的水力物理特性,可用于生长介质.
- 热解条件,特别是温度,可以优化,以产生具有理想特性和低环境风险 (低PAH水平) 的生物炭.
- 停留时间虽然比温度影响较小,但可以用来进一步调节生物炭的特性,其效果取决于温度,长时间的停留时间可能导致植物毒性.
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