Gao Peng, Zhuo Yue, Sun Guodong
School of Mechanical and Intelligent Manufacturing, Jiujiang University Jiujiang 332005 China
Technology Department of Library, Jiujiang University Jiujiang 332005 China.
RSC Adv. 2025 Feb 7;15(6):4220-4228. doi: 10.1039/d4ra08315f. eCollection 2025 Feb 6.
A novel high-performance porous carbon material, lanthanum(iii)-doped camphor leaf-derived porous carbon (La/CPC), was synthesized and used as an adsorbent for the anionic dye Congo red (CR). The La/CPC composite was characterized by nitrogen adsorption and desorption isotherms, scanning electron microscopy, transmission electron microscopy and X-ray photoelectron spectroscopy. The adsorption performance of CR by the CPC and La/CPC composites with different contents of lanthanum(iii) was evaluated in fixed-bed breakthrough experiments and batch tests at room temperature (298 K). The La/CPC composite had a high CR uptake capacity, which was found to be superior to those previously reported for other adsorbents. The La/CPC sorbents could be easily regenerated using an ethanol elution technique, and after five cycles, the reused La/CPC sorbent maintained about 98% of its CR capacity. The adsorption kinetics of CR onto the lanthanum(iii)-doped CPC sorbent followed a pseudo-second-order kinetic model and fitted well with a Langmuir adsorption isotherm. La/CPC is a promising adsorbent for the removal of anionic dyes from wastewater.
合成了一种新型高性能多孔碳材料——镧（III）掺杂樟树叶衍生多孔碳（La/CPC），并将其用作阴离子染料刚果红（CR）的吸附剂。通过氮气吸附-脱附等温线、扫描电子显微镜、透射电子显微镜和X射线光电子能谱对La/CPC复合材料进行了表征。在固定床穿透实验和室温（298K）下的批量试验中，评估了不同镧（III）含量的CPC和La/CPC复合材料对CR的吸附性能。La/CPC复合材料具有较高的CR吸附容量，发现其优于先前报道的其他吸附剂。La/CPC吸附剂可通过乙醇洗脱技术轻松再生，经过五个循环后，重复使用的La/CPC吸附剂保持其CR容量的约98%。CR在镧（III）掺杂CPC吸附剂上的吸附动力学遵循准二级动力学模型，并且与Langmuir吸附等温线拟合良好。La/CPC是一种从废水中去除阴离子染料的有前景的吸附剂。
