Abstract
Metal organic frameworks (MOFs)-based adsorbents for copper ion (Cu2+) generally have the disadvantages of instability in water, low adsorption capacity, and selectivity. Aimed at such problems, we fabricated MOF-199 coated with polyaniline (MOF-199@PANI, core@shell) composite for specific adsorption of Cu2+ in water efficiently. Combined with the characterization by SEM, XRD, and FT-IR, the comprehensively excellent performance probably derived from porous structures of MOF-199, as well as the complexation between Cu2+ and the N atoms of imine moieties in PANI. In addition, the coating process by PANI perfectly protected the MOF skeleton. The isothermal data fitted well to Langmuir isotherm model, of which the calculated adsorption capacity reached 7831.34 mg/g. It was one or two orders of magnitude higher than some other new absorbent for Cu2+ including some carbon-based or organic adsorbents. On the basis of the optimization including pH value, temperature, and ratio of raw materials, the fabricated composite has realized the removal of the spiked Cu2+ in actual fresh water and industrial wastewater samples.
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Funding
This work was supported by the National Natural Science Foundation of China (No. 22106070), Jiangsu Postdoctoral Research Funding Program (2021K563C), Open Foundation of Key Laboratory of Industrial Ecology and Environmental Engineering, MOE (KLIEEE-19–06), the Natural Science Foundation of the Jiangsu Higher Education Institutions of China (19KJB610002).
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Mr. Quan Yuan and Mr. Yalun Wang carried out the main experimental work; Dr. Fang Yuan put forward the research idea and took part in the design of experiment, as well as the discussion of results; Miss Shengran Jia took part in the materials characterization; Mr. Haibing Sun took part in the discussion of results; Mr. Xiaokuan Zhang took part in the discussion of results.
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Quan Yuan and Yalun Wang are co-first authors. They contribute equally to the article.
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Yuan, Q., Wang, Y., Yuan, F. et al. Water-stable metal organic framework-199@polyaniline with high-performance removal of copper II. Environ Sci Pollut Res 29, 44883–44892 (2022). https://doi.org/10.1007/s11356-022-19047-8
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DOI: https://doi.org/10.1007/s11356-022-19047-8