制备具有Fe-N键和多孔结构的新生物炭的简单方法:朝着酸盐吸附的方向
Quanfeng Wang1, Yang Xiao2, Jiufang Qi2
1School of Civil and Hydraulic Engineering, Chongqing University of Science and Technology, Chongqing 401331, China; Chongqing Institute of Geology and Mineral Resources, Chongqing 401120, China.
Waste management (New York, N.Y.)
|January 23, 2026
概括
一种新型的磁吸附剂 (Fe/N-KBC) 有效地从废水中去除酸盐. 这种材料具有高容量,快速的动力学,可以作为酸盐肥料重复使用,有助于资源回收.
科学领域:
- 环境科学与工程环境科学与工程
- 材料科学 材料科学 材料科学
- 吸附技术是一种吸附技术.
背景情况:
- 酸盐污染是一个重大的环境问题,需要有效的清除策略.
- 开发高效,稳定和可重复使用的吸附剂对于回收至关重要.
- 现有的吸附剂通常具有低容量,运动速度缓慢或稳定性差.
研究的目的:
- 从市政污泥中合成一个磁铁-联合吸剂 (Fe/N-KBC).
- 为了评估其在废水中酸盐吸附方面的性能.
- 研究吸附机制和资源再利用的潜力.
主要方法:
- 城市污泥与酸盐,尿素和化的共同热解,以产生Fe/N-KBC.
- 吸附剂的结构,表面积和磁性属性的表征.
- 酸盐吸附实验,包括动力学,异热,共存离子效应和再生研究.
- 连续流量柱测试和水培实验用于毒性和肥料潜在评估.
主要成果:
- Fe/N-KBC 具有较高的特定表面积和磁和度 (16.37 emu/g),使其易于分离.
- 即使与共存的离子实现高酸盐去除效率 (>81.62%),也显示出出色的选择性.
- 与其他吸附剂相比,它表现出优越的吸附能力和动力学,铁的出最小 (<0.019 mg/L).
- 在四个再生周期中保持了性能,并在连续列中处理了590个床位体积.
- 吸附机制涉及Fe-N协调,静电吸引,π-π相互作用,结合和孔隙填充.
结论:
- Fe/N-KBC是一种高效,稳定和可重复使用的磁吸附剂,用于酸盐去除.
- Fe-N 键是增强吸附和抑制铁漏的关键.
- 吸附剂显示出直接重新利用酸盐肥料的潜力,促进循环经济原则.
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