来自城市废水微藻生物质生物质的生物炭和水炭的比较表征和植物毒性评估
Jiacheng Sun1, Veronica Benavente2, Stina Jansson3
1UK Biochar Research Centre, School of Geosciences, University of Edinburgh, Crew Building, Alexander Crum Brown Road, Edinburgh EH9 3FF, UK.
Bioresource technology
|July 28, 2023
概括
来自废水的微藻生物炭和水炭显示出农业潜力. 后处理有效地减少了碳化合物.
科学领域:
- 环境科学 环境科学
- 农业科学 农业科学
- 生物技术是生物技术.
背景情况:
- 城市废水中的微藻类是生物炭和水炭的可持续原料.
- 这些材料提供了农业的好处,如营养含量和碳储存.
- 评估污染风险对于废水衍生材料的安全应用至关重要.
研究的目的:
- 为了比较微藻衍生的生物炭和水炭的特性和光毒性.
- 为了评估不同生产温度和停留时间的影响.
- 评估后处理方法的有效性,以减轻酸盐植物毒性.
主要方法:
- 在不同的条件下,微藻被 subjected to pyrolysis (生物炭) 和水热碳化 (HTC) (水炭).
- 分析了产生的生物炭和炭的特性和光毒性.
- 使用二甲 (DCM) 洗和二次热解作为后处理方法.
主要成果:
- 生物炭增强了种子发芽 (高达11.0%) 和幼苗生长 (高达70.0%).
- 原始酸盐表现出显著的植物毒性,归因于高挥发性物质含量.
- 通过DCM的洗和进一步的热解,有效地减轻了酸盐的植物毒性.
- 生物炭表现出更高的固定碳含量 (35.8-38.6%),表明具有优越的碳捕获潜力.
结论:
- 微藻生物炭是一种有前途的土壤改良剂,对植物生长有有益影响.
- 在农业应用之前,需要进行后处理以克服植物毒性.
- 从废水微藻中提取的生物炭与水炭相比,具有更高的碳捕获潜力.
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