Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention (LAP3), Department of Environmental Science and Engineering, Fudan University, Shanghai 200438, China.
Department of Civil and Environmental Engineering, Tokyo Institute of Technology, Tokyo 152-8550, Japan.
Sci Total Environ. 2021 Feb 25;757:143749. doi: 10.1016/j.scitotenv.2020.143749. Epub 2020 Nov 14.
The utilization of biomass pyrolysis volatile-derived water-dissolved organic matter (WOM, often called wood vinegar) determines sustainable recycling of biomass. Further, pyrolysis temperature significantly controls the cracking of biomass components, resulting in various molecular compositions and biological responses of WOM. Although it has been widely used in the agriculture, the relationship between molecular compositions and biological responses affected by heating temperature is still unclear. Here, it was observed that the WOM concentration increased with increasing temperatures and the pyrolysis of 1 g biomass can generate ~ WOM with 36.24 mg C. Moreover, with increasing pyrolysis temperatures, the generated WOM consisted of more phenols but fewer alcohols, furans, acids, and ketones, and demonstrated characteristics of higher aromaticity and lower m/z molecular weight. Due to the enhanced polarity, high temperatures promoted the solubility of WOM. Germination tests show that low pyrolysis temperatures-derived WOM (< 400 °C) with large-molecular-weight and low oxygen-containing (low O/C) promoted plant growth, while high temperatures-derived WOM (> 400 °C) with small-molecular-weight and high oxygen-containing (high O/C) inhibited growth. These results suggest that WOM can be separately collected at different pyrolysis temperatures to achieve sustainable recycling of pyrolysis volatile.
生物质热解挥发分衍生的水溶有机物质（WOM，通常称为木醋液）的利用决定了生物质的可持续循环。此外，热解温度显著控制生物质成分的裂解，导致 WOM 的各种分子组成和生物响应。尽管它已在农业中广泛应用，但受加热温度影响的分子组成与生物响应之间的关系仍不清楚。在这里，我们观察到 WOM 浓度随温度升高而增加，1g 生物质的热解可产生约 36.24mg C 的 WOM。此外，随着热解温度的升高，生成的 WOM 中酚类物质增多而醇类、呋喃类、酸类和酮类物质减少，具有更高的芳香度和更低的 m/z 分子量特征。由于极性增强，高温促进了 WOM 的溶解度。萌发试验表明，低热解温度衍生的 WOM（<400°C）具有大分子量和低含氧量（低 O/C），促进植物生长，而高热解温度衍生的 WOM（>400°C）具有小分子量和高含氧量（高 O/C），抑制生长。这些结果表明，可以在不同的热解温度下分别收集 WOM，以实现热解挥发分的可持续循环。
