Li Ke, Chen Miaomiao, Chen Lei, Zhao Songying, Pan Wenbo, Li Pan
Key Laboratory of Songliao Aquatic Environment, Ministry of Education, Jilin Jianzhu University, Changchun, 130118, China.
Heliyon. 2024 Aug 28;10(17):e36848. doi: 10.1016/j.heliyon.2024.e36848. eCollection 2024 Sep 15.
ZIF-67 nanoparticles were synthesized by a simple method at room temperature and used to remove chlortetracycline hydrochloride (CTC) and doxycycline hydrochloride (DOX) from water. ZIF-67 was characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), fourier transform infrared spectroscopy (FT-IR), Brunauer-Emmett-Teller (BET) surface area, X-ray photoelectron spectroscopy (XPS), thermogravimetry (TGA) and zeta potential analyzer. The morphology and chemical composition of the synthesized ZIF-67 were characterized. The effects of key parameters such as pH, dosage, temperature, contact time, different initial concentrations and coexisting ions on the adsorption behavior were systematically studied. The results of batch adsorption experiments indicate that the adsorption process conforms to the pseudo-second-order kinetic model and Sips model. At 303K, the removal rates of CTC and DOX at 150 mg/L reached 99.16 % and 97.61 %, and the maximum adsorption capacity of CTC and DOX reached 1411.68 and 1073.28 mg/g, respectively. At the same time, ZIF-67 has excellent stability and reusability. Most importantly, the possible adsorption mechanism is proposed by exploring the changes of SEM, TEM, BET and FT-IR characterization results before and after the reaction, which mainly includes pore filling, electrostatic interaction and π-π interaction. The prepared ZIF-67 has a large specific surface area (1495.967 m g), achieves a high removal rate within a short time frame, and maintains a high removal rate across a wide pH range. These characteristics make ZIF-67 a potentially promising adsorbent for removing antibiotics from aqueous solutions.
通过一种简单的方法在室温下合成了ZIF-67纳米颗粒，并用于从水中去除盐酸金霉素（CTC）和盐酸多西环素（DOX）。通过扫描电子显微镜（SEM）、透射电子显微镜（TEM）、傅里叶变换红外光谱（FT-IR）、布鲁诺尔-埃米特-泰勒（BET）比表面积、X射线光电子能谱（XPS）、热重分析（TGA）和zeta电位分析仪对ZIF-67进行了表征。对合成的ZIF-67的形态和化学成分进行了表征。系统研究了pH值、剂量、温度、接触时间、不同初始浓度和共存离子等关键参数对吸附行为的影响。批量吸附实验结果表明，吸附过程符合准二级动力学模型和Sips模型。在303K时，150mg/L的CTC和DOX去除率分别达到99.16%和97.61%，CTC和DOX的最大吸附容量分别达到1411.68和1073.28mg/g。同时，ZIF-67具有优异的稳定性和可重复使用性。最重要的是，通过探究反应前后SEM、TEM、BET和FT-IR表征结果的变化，提出了可能的吸附机制，主要包括孔隙填充、静电相互作用和π-π相互作用。制备的ZIF-67具有较大的比表面积（1495.967m²/g），在短时间内实现了高去除率，并且在较宽的pH范围内保持高去除率。这些特性使ZIF-67成为从水溶液中去除抗生素的潜在有前景的吸附剂。
