多层次的协同调节缓释性能通过LDH改性生物炭基缓释肥料
Dongye Huang1, Nana Liu1, Chen Guan1
1School of Environmental and Chemical Engineering, Xi'an Key Laboratory of Textile Chemical Engineering Auxiliaries, Engineering Research Center of Biological Resources Development and Pollution Control Universities of Shaanxi Province, Key Laboratory of Textile Dyeing Wastewater Treatment Universities of Shaanxi Province, Xi'an Polytechnic University, Xi'an, 710048, China.
Environmental research
|August 14, 2025
概括
这项研究开发了一种基于生物炭的新型缓释肥 (BSPF),经过Mg-Al分层双氧化物 (LDH-BSPF) 修改. 创新的LDH-BSPF肥料显著提高了缓释性能,改善了植物生长.
科学领域:
- 材料科学 材料科学 材料科学
- 农业科学 农业科学
- 环境科学 环境科学
背景情况:
- 全球稀缺和低效的传统肥需要先进的营养输送系统.
- 基于生物炭的缓释肥 (BSPF) 提供了一个可持续的替代品,但需要进一步优化以提高性能.
- 层状双氧化物 (LDH) 具有独特的结构性质,适用于营养物质的固定和控制释放.
研究的目的:
- 开发和描述一种新的Mg-Al双层氧化物修饰生物炭基缓释化肥 (LDH-BSPF).
- 研究Mg/Al摩尔比率和热解温度对LDH-BSPF的结构性质和释放的影响.
- 与传统肥料相比,评估LDH-BSPF在促进植物生长方面的有效性.
主要方法:
- 生物质,源和Mg-Al LDH的联合热解以制造LDH-BSPF.
- 对Mg/Al分子比率 (2:1-5:1) 和热解温度 (400-600°C) 对材料特性进行系统的研究.
- 进行了为期28天的静态水释放实验,进行了全面的材料表征 (例如BET表面积),分化和植物的盆栽实验.
主要成果:
- LDH修改显著优化了生物碳孔结构,增加了BET表面积的1.48-9.94倍.
- 在LDH-BSPF中,呈现出一个层次化的固定路径 (表面吸附-层间吸附-孔隙捕获).
- 4:1-LDH-BSPF在28天内显示了36.8%的累积释放率,与未经修改的BSPF (66.5%) 相比减少了44.6%,释放动力学以扩散为主. 的实验证实了LDH-BSPF的优越胡增长促进作用.
结论:
- 在LDH中间层中的多级酸盐保留转化和LDH对生物炭结构的协同作用是提高缓释性能的关键.
- LDH-BSPF为开发高效慢释放肥料提供了一个有前途的战略.
- 这项研究为提高利用效率和解决资源短缺问题提供了理论基础.
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