College of Water Conservancy and Hydropower Engineering, Sichuan Agricultural University, Ya'an, 625014, China; College of Water Resources and Hydropower, Sichuan University, Chengdu, 610065, China.
College of Water Conservancy and Hydropower Engineering, Sichuan Agricultural University, Ya'an, 625014, China.
J Environ Manage. 2024 Feb 14;352:119984. doi: 10.1016/j.jenvman.2023.119984. Epub 2024 Jan 12.
Here, Fe/N co-doped porous biochars (FeNKBCs) were obtained by grinding corncob, CHCOOK, FeCl·6HO, and CHN via one-step synthesis and were applied to remove antibiotics from wastewater. Notably, CHCOOK had an excellent porous activation ability. The developed nanotubular structure of Fe1N2KBC had a high pore volume (V) (1.2131 cm/g) and specific surface areas (SSA) (2083.54 m/g), which showed outstanding sorption abilities for TC (764.35 mg/g), OTC (560.82 mg/g), SMX (291.45 mg/g), and SMT (354.65 mg/g). The adsorption process of TC was controlled by chemisorption. Moreover, Fe1N2KBC has an excellent dynamic adsorption performance (620.14 mg/g) in a fixed-bed column. The properties of SSA, V, and the content of graphite N and Fe-N were positively correlated with TC adsorption capacity. The high performance of TC removal was related to π-π stacking, pore-filling, hydrogen bond, and electrostatic interaction. Fe1N2KBC possessed stable sorption amounts in pH 2-12 and actual water, and well reuse performance. The results of this work present an effective preparation method of Fe/N porous biochar for TC-contaminated water remediation.
在这里，通过一步合成，将玉米芯、CHCOOK、FeCl·6HO 和 CHN 研磨得到了 Fe/N 共掺杂多孔生物炭（FeNKBC），并将其应用于从废水中去除抗生素。值得注意的是，CHCOOK 具有优异的多孔活化能力。Fe1N2KBC 的开发的纳米管状结构具有高孔体积（V）（1.2131 cm/g）和比表面积（SSA）（2083.54 m/g），对 TC（764.35 mg/g）、OTC（560.82 mg/g）、SMX（291.45 mg/g）和 SMT（354.65 mg/g）表现出出色的吸附能力。TC 的吸附过程受化学吸附控制。此外，Fe1N2KBC 在固定床柱中具有出色的动态吸附性能（620.14 mg/g）。SSA、V 和石墨 N、Fe-N 的含量等性质与 TC 吸附容量呈正相关。TC 去除的高性能与 π-π 堆积、孔填充、氢键和静电相互作用有关。Fe1N2KBC 在 pH 2-12 和实际水中具有稳定的吸附量，且具有良好的可重复使用性能。这项工作的结果为 TC 污染水修复提供了一种有效的 Fe/N 多孔生物炭的制备方法。
