Magnetically separable Fe-MIL-88B_NH(2) carbonaceous nanocomposites for efficient removal of sulfamethoxazole from aqueous solutions.
Magnetically separable Fe-MIL-88B_NH(2) carbonaceous nanocomposites for efficient removal of sulfamethoxazole from aqueous solutions.
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可磁分离的 Fe-MIL-88B_NH(2) 碳质纳米复合材料，用于有效去除水溶液中的磺胺甲恶唑。
DOI：
10.1016/j.jcis.2020.02.116
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发表时间：
2020
影响因子：
9.9
通讯作者：
Peng Guixiang
中科院分区：
文献类型：
--
作者：
Ou Yucheng;Yao Lixian;Li Yanchun;Bai Cuihua;Luque Rafael;Peng Guixiang
广泛接触抗生素可能对环境和人类健康有害。开发有效和方便的技术来去除水中残留的抗生素势在必行。本文以Fe-MIL-88B_NH_2为原料，采用热分解法制备了具有团簇结构和良好磁响应的磁性纳米复合材料（MNC）。磁性纳米复合材料在700 °C下对磺胺甲恶唑（SMX）具有很高的吸附效率（73.53 mg/g）。系统地考察了溶液pH、离子强度、共存离子和SMX浓度等实验条件。吸附等温线和动力学符合Langmuir和准二级动力学模型，吸附过程与溶液pH值有关，吸附机理为孔隙填充效应、π-π EDA和静电相互作用。此外，MNC-700表现出良好的可重复使用性和磁分离性能，重复使用6次，吸附容量没有显着损失。
Extensive exposure to antibiotics could potentially be harmful to the environment and human health. The development of effective and convenient technologies to remove residual antibiotics from water is imperative. Herein, we successfully developed a facile method via pyrolysis of Fe-MIL-88B_NH2to synthesize magnetic nanocomposites (MNC) as potential adsorbents, which exhibited cluster-shape structure and excellent magnetic response. Magnetic nanocomposites carbonized at 700 °C showed high efficiency for sulfamethoxazole (SMX) adsorption (73.53 mg/g). Some experimental conditions including solution pH, ionic strength, coexisting ions and SMX concentration were systematically investigated. The adsorption isotherm and kinetic followed Langmuir and the pseudo-second-order models, and the adsorption process was dependent on the solution pH. The adsorption mechanism hypothesis was pore filling effect, π–π EDA and electrostatic interactions. Moreover, MNC-700 exhibited good reusability and magnetic separation properties, being reused six times without significant loss in adsorption capacity.