吸附
腐植酸
介孔材料
吸热过程
朗缪尔吸附模型
傅里叶变换红外光谱
化学工程
材料科学
金属有机骨架
解吸
无机化学
化学
有机化学
催化作用
肥料
工程类
作者
Yuankang Jiang,Zhenggang Wang,Zengwei Zhu,Maowei He,Pan Zhou
出处
期刊:Water
[MDPI AG]
日期:2022-06-02
卷期号:14 (11): 1800-1800
被引量:3
摘要
Humic acid (HA) in makeup water is one of the important safety issues of high-parameter power plants. Herein, the Zr-based metal organic frameworks (Zr-MOFs) were applied to remove humic acid in water. The mesoporous and active sites of Zr-MOFs were controlled by different ratios of ligands to increase the adsorption of HA. The maximum adsorption capacity was 150.15 mg g−1. The morphology and adsorption properties of the Zr-MOFs were characterized using scanning electron microscopy (SEM), X-ray diffraction (XRD), surface charge, Fourier Transform infrared (FT-IR), N2 adsorption-desorption and adsorption test. The adsorption process of HA accorded with the pseudo-second-order kinetics, while the adsorption isotherm conformed to the Langmuir model and the adsorption was proved to be a spontaneous and endothermic process. Physical adsorption by the mesoporous materials and the hydrogen bonding interactions between the Zr-MOFs and HA were the driving forces of HA adsorption. These results provided useful information for the effective removal of HA and enhanced our understanding of the adsorption mechanism of HA on Zr-MOFs.
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