期刊
MATERIALS
卷 12, 期 6, 页码 -出版社
MDPI
DOI: 10.3390/ma12060942
关键词
carboxymethylcellulose; adsorption; Pb(II); MOF-5
类别
资金
- National Natural Science Foundation of China [21476212]
- Science and Technology Department of Zhejiang Province [2018C02038]
- Bureau of Science and Technology of Zhoushan [2017C41005]
The ability to remove toxic heavy metals, such as Pb(II), from the environment is an important objective from both human-health and ecological perspectives. Herein, we describe the fabrication of a novel carboxymethylcellulose-coated metal organic material (MOF-5-CMC) adsorbent that removed lead ions from aqueous solutions. The adsorption material was characterized by Fourier-transform infrared spectroscopy, X-ray diffractometry, scanning electron microscopy, and X-ray photoelectron spectroscopy. We studied the functions of the contact time, pH, the original concentration of the Pb(II) solution, and adsorption temperature on adsorption capacity. MOF-5-CMC beads exhibit good adsorption performance; the maximum adsorption capacity obtained from the Langmuir isotherm-model is 322.58 mg/g, and the adsorption equilibrium was reached in 120 min at a concentration of 300 mg/L. The adsorption kinetics is well described by pseudo-second-order kinetics, and the adsorption equilibrium data are well fitted to the Langmuir isotherm model (R-2 = 0.988). Thermodynamics experiments indicate that the adsorption process is both spontaneous and endothermic. In addition, the adsorbent is reusable. We conclude that MOF-5-CMC is a good adsorbent that can be used to remove Pb(II) from aqueous solutions.
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