Wei Fuhua, Zhang Qin, Ren Qinhui, Chen Hongliang, Zhang Yutao, Liang Zhao
College of Chemistry and Chemical Engineering, Anshun University, Anshun 561000, China.
Institute of Micro/Nano Materials and Devices, Ningbo University of Technology, Ningbo 315211, China.
Molecules. 2024 Sep 20;29(18):4477. doi: 10.3390/molecules29184477.
The Zn/Cr-MOFs/TiO composites were synthesized using the solvothermal method. XRD, FTIR, and SEM techniques were utilized to characterize the Zn/Cr-MOFs/TiO composites employed for simulating levofloxacin hydrochloride in wastewater. The impact of the mass of the Zn/Cr-MOFs/TiO composite, concentration of levofloxacin hydrochloride, solution pH, and temperature on the adsorption performance was investigated. Experimental findings indicated that at pH 6, the maximum removal efficiency of levofloxacin hydrochloride by the Zn/Cr-MOFs/TiO composite was achieved at 88.8%, with an adsorption capacity of 246.3 mg/g. To analyze the experimental data, both pseudo-first-order and pseudo-second-order kinetics models were applied, revealing that the pseudo-second-order model provided a better fit to the data. Additionally, Langmuir and Freundlich isotherm models were used to study equilibrium adsorption behavior and showed good agreement with both kinetic modeling and Langmuir isotherm analysis results. These observations suggest that monolayer adsorption predominates during the removal process of levofloxacin hydrochloride by Zn/Cr-MOFs/TiO composites.
采用溶剂热法合成了Zn/Cr-MOFs/TiO复合材料。利用XRD、FTIR和SEM技术对用于模拟废水中盐酸左氧氟沙星的Zn/Cr-MOFs/TiO复合材料进行了表征。研究了Zn/Cr-MOFs/TiO复合材料的质量、盐酸左氧氟沙星浓度、溶液pH值和温度对吸附性能的影响。实验结果表明，在pH值为6时，Zn/Cr-MOFs/TiO复合材料对盐酸左氧氟沙星的最大去除效率达到88.8%，吸附容量为246.3 mg/g。为了分析实验数据，应用了准一级动力学模型和准二级动力学模型，结果表明准二级动力学模型与数据拟合得更好。此外，还使用Langmuir等温线模型和Freundlich等温线模型研究平衡吸附行为，结果与动力学建模和Langmuir等温线分析结果均吻合良好。这些观察结果表明，Zn/Cr-MOFs/TiO复合材料在去除盐酸左氧氟沙星的过程中以单层吸附为主。
