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Preparation of GO/MIL-101(Fe,Cu) composite and its adsorption mechanisms for phosphate in aqueous solution

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A Correction to this article was published on 23 July 2021

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Abstract

In this study, MIL-101(Fe), MIL-101(Fe,Cu), and graphene oxide (GO)/MIL-101(Fe,Cu) were synthesized to compose a novel sorbent. The adsorption properties of these three MOF-based composites were compared toward the removal of phosphate. Furthermore, the influencing factors including adsorption time, pH, temperature, and initial concentration on the adsorption capacity of phosphate on these materials as well as the reusability of the material were discussed. The structure of fabricated materials and the removal mechanism of phosphate on the composite material were analyzed by scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), nitrogen adsorption-desorption analysis, and zeta potential. The results show that the maximum adsorption capacity of phosphate by the composite GO/MIL-101(Fe,Cu)-2% was 204.60 mg·g−1, which is higher than that of MIL-101(Fe,Cu) and MIL-101(Fe). likewise the specific surface area of GO/MIL-101(Fe,Cu)-2% is 778.11 m2/g is higher than that of MIL-101(Fe,Cuand MIL-101(Fe),which are 747.75 and 510.66 m2/g, respectively. The adsorption mechanism of phosphate is electrostatic attraction, forming coordination bonds and hydrogen bonds. The fabricated material is a promising adsorbent for the removal of phosphate with good reusability.

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All authors agreed to state that required data and materials relevant will be available for further validity of the results presented.

Funding

This study was financially supported by the National Natural Science Foundation of China (51278418).

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You Wu designed the materials, conducted major adsorption experiments, and wrote the manuscript of the paper. Zhuannian Liu provided guidance of the research, reviewed the manuscript, and provided experimental resources. Bakhtari Mohammad Fahim conducted data processing and grammar review. Junnan Luo did the characterization experiment. All authors read and approved the final manuscript.

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Correspondence to You Wu.

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The authors declare that they have no competing interests.

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Responsible editor: Tito Roberto Cadaval Jr

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The original online version of this article was revised: The correct name of the 2nd Author is presented in this paper.

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Wu, Y., Liu, Z., Bakhtari, M.F. et al. Preparation of GO/MIL-101(Fe,Cu) composite and its adsorption mechanisms for phosphate in aqueous solution. Environ Sci Pollut Res 28, 51391–51403 (2021). https://doi.org/10.1007/s11356-021-14206-9

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  • DOI: https://doi.org/10.1007/s11356-021-14206-9

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