Metal-azolate framework-6 for fast adsorption removal of phthalic acid from aqueous solution

Metal-azolate framework-6 for fast adsorption removal of phthalic acid from aqueous solution
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金属氮唑盐骨架-6用于快速吸附去除水溶液中的邻苯二甲酸

DOI:
10.1016/j.molliq.2016.08.056
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发表时间:
2016-11
影响因子:
6
通讯作者:
Zhonghai Ni
Zhonghai Ni
中科院分区:
化学2区
文献类型:
--
作者:
Chao Wang;Xinlong Yan;Xiaoyan Hu;Min Zhou;Zhonghai Ni

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邻苯二甲酸(H2-PA)是废水中常见的污染物,开发高效的吸附去除材料具有重要的环境科学意义。本文从吸附等温线、热力学、动力学和再生等方面研究了金属唑骨架6(MAF-6)的合成及其在水溶液中去除H2-PA中的应用。吸附遵循准二级动力学,并拟合Freundlich吸附模型,容量为572 mg/g(在20 °C和初始浓度为100 ppm)。用过的MAF-6可以容易地再生,并且至少循环使用3次而没有显著的容量损失。此外,它提供了一个更大的吸附容量和更快的吸附动力学比沸石咪唑骨架-8(ZIF-8),并提出了一个机制,为更好的性能。
Phthalic acid (H2-PA) is a common pollutant in wastewater, and the development of efficient materials for its adsorption and removal is thus of great significance in environmental science. Here, we report the synthesis of Metal-azolate framework-6 (MAF-6) and its application in removal of H2-PA from aqueous solution, in view of adsorption isotherms and thermodynamics, kinetics, and regeneration. The adsorption followed a pseudo-second-order kinetics and fitted the Freundlich adsorption model with a capacity of 572 mg/g (at 20 °C and initial concentration of 100 ppm). The used MAF-6 could be regenerated easily and recycled at least 3 times without significant loss of capacity. In addition, it provided a larger adsorption capacity and faster adsorption kinetics than Zeolitic imidazolate framework-8 (ZIF-8), and a mechanism for the preferable performances was proposed.
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