的激活会影响家禽垃圾生物炭的特性和酸盐吸附能力
Joshua T Padilla1, Donald W Watts1, Jeffrey M Novak1
1United States Department of Agriculture, Agricultural Research Service, Coastal Plains Soil, Water and Plant Research Center, Florence, SC 29501, USA.
Biochar
|January 25, 2024
概括
的激活显著降低了家禽垃圾生物炭中的可溶性,使其成为防止流失的有效土壤修补剂. 这一过程提高了吸附能力,这对环境保护至关重要.
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:
- 生物炭是一种有前途的土壤修改剂,可以减少农田的 (P) 排放.
- 禽类垃圾 (PL) 是生物炭生产的丰富原料,但PL衍生生物炭往往含有高水平的可溶性P.
- 化学修饰是必要的,以提高PL衍生生物炭的吸附能力.
研究的目的:
- 研究 (Mg) 激活对可提取 (EP) 和PL衍生生物炭的P吸附能力的影响.
- 评估不同Mg激活水平和热解温度对生物炭性质的影响.
- 评估家禽垃圾年龄对Mg激活生物炭有效性的作用.
主要方法:
- 从家禽垃圾中生产生物炭,在500-900°C的热解温度下用不同度的 (Mg) (0-1M) 激活.
- 使用Langmuir异热法分析可提取 (EP) 和 (P) 吸附能力.
- 使用X射线衍光图来识别矿物相的生物炭组成的表征.
主要成果:
- 增加的Mg激活水平和更高的热解温度 (≥700°C) 显著减少了生物炭中的可提取 (EP).
- 通过≥0.25 M Mg激活和≥700 °C热解产生的生物炭显示了可以忽略不计的EP.
- 最大P吸附能力 (Pmax) 范围在0.66-10.35mgg-1之间,在由1M Mg激活PL衍生的生物炭中观察到较高的Pmax,这归因于MgO丰富性.
结论:
- (Mg) 激活是一种有效的策略,用于生产具有低可提取 (EP) 的家禽垃圾 (PL) 衍生生物碳.
- 用Mg激活的PL生物炭显示出降低水生生态系统中负荷的巨大潜力.
- 这种方法提供了一种可持续的方法,可以利用家禽垃圾,同时减轻环境污染.
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