College of Pharmacy, Dali University, Dali, 671003, People's Republic of China.
Sci Rep. 2023 Jul 10;13(1):11107. doi: 10.1038/s41598-023-38425-x.
The tetracycline hydrochloride (TCH) removal from wastewater is important for the environment and human health yet challenging. Herein, the Eu-based MOF, Eu(BTC) (BTC represents 1,3,5-trimesic acid) was prepared by an efficient and environmental-friendly strategy, and then was used for the TCH capture for the first time. The Eu(BTC) was characterized by different methods such as X-ray diffraction, scanning electron microscopy and Fourier-transform infrared spectroscopy. The TCH uptake of Eu(BTC) was investigated systematically. The influences of experiment conditions such as solution pH value, adsorption time and initial concentration on TCH capacity of Eu(BTC) were also studied. The Eu(BTC) obtained exhibited remarkable TCH uptake (q was up to 397.65 mg/g), which was much higher than those of most materials such as UiO-66/PDA/BC (184.30 mg/g), PDA-NFsM (161.30 mg/g) and many carbon-based materials reported till now. Besides, the TCH adsorption behavior on Eu(BTC) was explored by Freundlich and Langmuir equations, and the adsorption mechanism was further analyzed. The experimental results suggested that the TCH adsorption mechanism of Eu(BTC) included the π-π interaction, electrostatic interaction and coordinate bonds. The excellent TCH adsorption performance and the efficient fabrication strategy make the Eu(BTC) prepared promising in TCH removal.
盐酸四环素（TCH）的废水去除对于环境和人类健康很重要，但却具有挑战性。本文首次采用一种高效、环保的策略制备了基于铕的 MOF（Eu（BTC），BTC 代表 1,3,5-均苯三甲酸），并将其用于 TCH 的捕获。通过 X 射线衍射、扫描电子显微镜和傅里叶变换红外光谱等方法对 Eu（BTC）进行了表征。系统研究了 Eu（BTC）的 TCH 摄取情况。还研究了实验条件（例如溶液 pH 值、吸附时间和初始浓度）对 Eu（BTC）TCH 容量的影响。Eu（BTC）表现出显著的 TCH 摄取能力（q 高达 397.65 mg/g），远高于大多数材料（如 UiO-66/PDA/BC（184.30 mg/g）、PDA-NFsM（161.30 mg/g）和迄今为止报道的许多碳基材料）。此外，还通过 Freundlich 和 Langmuir 方程探索了 TCH 在 Eu（BTC）上的吸附行为，并进一步分析了吸附机制。实验结果表明，Eu（BTC）的 TCH 吸附机制包括π-π 相互作用、静电相互作用和配位键。Eu（BTC）优异的 TCH 吸附性能和高效的制备策略使其在 TCH 去除方面具有广阔的应用前景。
