用RSM优化Mg/Al-LDH生物炭复合物增强去除:深入了解层间结构演变和吸附机制
Aohang Zhou1, Qi Wu1, Hongbo Zhang1
1College of Water Resource, Shenyang Agricultural University, Shenyang, Liaoning, 110866, China.
Journal of environmental management
|February 7, 2026
概括
优化层次的双氧化物修饰生物炭有效地从废水中去除. 这种增强的材料显示了缓释肥料应用的潜力,减轻了环境污染.
科学领域:
- 环境化学环境化学
- 材料科学 材料科学 材料科学
- 水处理技术水处理技术
背景情况:
- 农业废水中的高度,由于毒性和持久性,造成了重大生态风险.
- 用层状双氧化物 (LDH) 修改的生物质对阳离子吸附有希望,但优化LDH结构以去除酸盐和理解机制至关重要.
研究的目的:
- 使用响应表面方法 (RSM) 优化Mg/Al-LDH修饰生物炭 (MABC) 的合成,以增强酸盐吸附.
- 通过优化的MABC来研究负责高效吸附的微观机制.
- 评估丰富MABC作为缓释肥料的潜力.
主要方法:
- 进行了批量吸附实验,以测试MABC的性能.
- 使用响应表面方法 (RSM) 来优化MABC合成条件 (Mg/Al比,生物炭剂量,烤温度).
- 材料表征使用XRD,XPS,FTIR和SEM来阐明吸附机制.
- 土壤柱实验评估了MABC-P的释放率.
主要成果:
- 优化的MABC (MABC6) 的最大吸附能力达到54.932mg·g-1 .
- MABC6表现出高结晶度,大表面积,丰富的功能组和扩大的层间距.
- 吸附机制包括化学吸附,多层吸附,静电吸引,离子交换,表面复杂化和连接体交换.
- MABC6-P表现出受控的释放率 (17.59%在30天内),表明缓释化肥的潜力.
结论:
- RSM优化成功增强了MABC的晶体结构,扩大了层间距,并显著提高了酸盐吸附能力.
- 优化的MABC对水生环境的修复有效.
- MABC显示出作为一种可行的材料来缓释肥料应用的承诺,减少流量.
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