Jia Feiyue, Zhao Donghua, Shu Mengzhao, Sun Feifei, Wang Dongbo, Chen Chen, Deng Yu, Zhu Xiaoming
Shanghai Waterway Engineering Design and Consulting Co., Ltd., Shanghai, 200120, China.
College of Environmental Science and Engineering, Hunan University, Changsha, 410082, People's Republic of China.
Environ Sci Pollut Res Int. 2022 Aug;29(36):55026-55038. doi: 10.1007/s11356-022-19684-z. Epub 2022 Mar 21.
In the study, Fe-MIL-100 was modified by adding Co in the synthesis process; Co/Fe-MIL-100 was successfully synthesized and used to adsorb tetracycline. The addition of Co increased the thermal stability of Fe-MIL-100 without changing the crystal structure. It was found that Co/Fe-MIL-100 exhibited satisfactory performance in tetracycline removal, the tetracycline removal efficiency reached almost 100% in the initial concentration range of 10-40 mg/L, and it still reached 82.38% under the condition of 60 mg/L tetracycline. Besides, the factors of tetracycline concentration, pH and inorganic anion on removal efficiency were explored. The coexistence of inorganic anion decreased the adsorption capacity of tetracycline due to the competitive adsorption. CO had a more obvious inhibition effect on the adsorption efficiency of tetracycline than Cl. The fitting correlation coefficient of Langmuir model was higher and the kinetics better fitted by pseudo-second-order, respectively. As a result of its high removal efficiency and excellent recycling performance, it has great potential in application fields such as removing tetracycline from wastewater.
在该研究中，通过在合成过程中添加钴对Fe-MIL-100进行改性；成功合成了Co/Fe-MIL-100并将其用于吸附四环素。钴的添加提高了Fe-MIL-100的热稳定性，而未改变其晶体结构。研究发现，Co/Fe-MIL-100在去除四环素方面表现出令人满意的性能，在10-40mg/L的初始浓度范围内，四环素去除效率几乎达到100%，在四环素浓度为60mg/L的条件下仍达到82.38%。此外，还探究了四环素浓度、pH值和无机阴离子对去除效率的影响。由于竞争吸附，无机阴离子的共存降低了四环素的吸附容量。CO对四环素吸附效率的抑制作用比Cl更明显。Langmuir模型的拟合相关系数更高，动力学分别更符合准二级模型。由于其高去除效率和优异的循环性能，它在从废水中去除四环素等应用领域具有巨大潜力。
