School of Water and Environment, Chang'an University, Xi'an, 710054, China.
Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region, Ministry of Education, Chang'an University, Xi'an, 710054, China.
Environ Sci Pollut Res Int. 2021 Jun;28(21):27398-27410. doi: 10.1007/s11356-021-12640-3. Epub 2021 Jan 28.
This work explored the use of porous carbon (PC) materials converted from waste lignin as raw materials for the removal of chloramphenicol (CAP) in water. The PC with controllable pores was prepared through a facile, cost-effective one-step method. The physical and chemical properties of the material were characterized by BET, SEM, FT-IR, and XRD, and the best conditions for preparation were selected based on the results of adsorption experiments. The PC, which was prepared at reaction temperature of 800 °C and the KCO/sodium lignosulfonate mass ratio of 4, namely PC-800-4, had a high specific surface area (1305.5 m g) and pore volume (0.758 cm g). At a lower initial concentration of CAP (C = 120 mg L), the maximum adsorption capacity of this adsorbent was 534.0 mg g at 303 K. In addition, PC-800-4 maintained good adsorption performance in a wide pH range and strongly resisted the interference of ions and humic acid. The results showed that the adsorption removal CAP was based on physical adsorption and chemical adsorption as a process supplement. The advantages of wide sources, high efficiency and speed, wide application, and rich oxygen-containing functional groups made the adsorbent have great application potential for removal chloramphenicol from water.
这项工作探索了将源自废木质素的多孔碳 (PC) 材料转化为去除水中氯霉素 (CAP) 的用途。通过简便、经济高效的一步法制备了具有可控孔的 PC。通过 BET、SEM、FT-IR 和 XRD 对材料的物理化学性质进行了表征，并根据吸附实验的结果选择了最佳的制备条件。在反应温度为 800°C 和 KCO/ 磺酸钠木质素质量比为 4 的条件下制备的 PC（即 PC-800-4）具有高比表面积（1305.5 m²/g）和孔体积（0.758 cm³/g）。在较低的初始 CAP 浓度 (C = 120 mg/L) 下，该吸附剂在 303 K 时的最大吸附容量为 534.0 mg/g。此外，PC-800-4 在较宽的 pH 范围内保持良好的吸附性能，并且能够强烈抵抗离子和腐殖酸的干扰。结果表明，CAP 的吸附去除是基于物理吸附和化学吸附作为一个过程的补充。该吸附剂来源广泛、高效快速、应用广泛、含氧官能团丰富，在去除水中氯霉素方面具有巨大的应用潜力。
