Center of Excellence for Green Energy and Environmental Nanomaterials (CE@GrEEN), Nguyen Tat Thanh University, 300A Nguyen Tat Thanh, District 4, Ho Chi Minh City, Vietnam.
NTT Hi-Tech Institute, Nguyen Tat Thanh University, Ho Chi Minh City, Vietnam.
Environ Sci Pollut Res Int. 2019 Sep;26(27):28106-28126. doi: 10.1007/s11356-019-06011-2. Epub 2019 Jul 30.
The occurrence and fate of antibiotic compounds in water can adversely affect human and animal health; hence, the removal of such substrates from soil and water is indispensable. Herein, we described the synthesis method of mesoporous carbon (MPC) via the pyrolysis route from a coordination polymer Fe-based MIL-53 (or MIL-53, shortly). The MPC structure was analyzed by several physical techniques such as SEM, TEM, BET, FT-IR, VSM, and XRD. The response surface methodology (RSM) was applied to find out the effects of initial concentration, MPC dosage, and pH on the removal efficiency of trimethoprim (TMP) and sulfamethoxazole (SMX) antibiotics in water. Under the optimized conditions, the removal efficiencies of TMP and SMX were found to be 87% and 99%, respectively. Moreover, the adsorption kinetic and isotherm studies showed that chemisorption and the monolayer adsorption controlled the adsorption process. The leaching test and recyclability studies indicated that the MPC structure was stable and can be reused for at least four times without any considerable change in the removal efficiency. Plausible adsorption mechanisms were also addressed in this study. Because of high maximum adsorption capacity (85.5 mg/g and 131.6 mg/g for TMP and SMX, respectively) and efficient reusability, MPC is recommended to be a potential adsorbent for TMP and SMX from water media.
抗生素化合物在水中的出现和命运会对人类和动物的健康产生不利影响;因此,从土壤和水中去除这些物质是必不可少的。在此,我们描述了一种通过热解路线从配位聚合物 Fe 基 MIL-53(或 MIL-53,简称)合成介孔碳(MPC)的方法。通过 SEM、TEM、BET、FT-IR、VSM 和 XRD 等多种物理技术对 MPC 结构进行了分析。响应面法(RSM)用于研究初始浓度、MPC 用量和 pH 值对水中甲氧苄啶(TMP)和磺胺甲恶唑(SMX)抗生素去除效率的影响。在优化条件下,TMP 和 SMX 的去除效率分别达到 87%和 99%。此外,吸附动力学和等温线研究表明,化学吸附和单层吸附控制着吸附过程。浸出试验和可重复使用性研究表明,MPC 结构稳定,至少可重复使用四次,而去除效率没有任何明显变化。在本研究中还提出了合理的吸附机制。由于具有高的最大吸附容量(TMP 和 SMX 分别为 85.5mg/g 和 131.6mg/g)和高效的可重复使用性,MPC 被推荐为水中 TMP 和 SMX 的潜在吸附剂。