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Green synthesis and evaluation of iron-based metal–organic framework MIL-88B for the efficient decontamination of arsenate from water

Abstract

Iron-containing metal–organic frameworks (MOFs) have gradually emerged as environmentally benign alternatives for reducing the levels of environmental contamination because of their advantages, such as readily obtained raw materials with low cost, nontoxic metal source with good biocompatibility, and distinguished physicochemical features e.g., enormous porosity, framework flexibility, and semiconductor properties. In this study, we reported an innovative strategy for synthesizing an iron-based MOF, MIL-88B, at room temperature. The novelty of this strategy was the use of ethanol as solvent and the pretreatment of dry milling with neither the bulk use of the toxic organic solvent nor the addition of extremely dangerous hydrofluoric acid or strong alkali. The synthesized MIL-88B(Fe) was evaluated as a sorbent for removing arsenate in water and exhibited high adsorption capacity (156.7 mg/g) at a low dosage. The removal capacity of trace arsenate on MIL-88B(Fe) was 32.3 mg/g at a low equilibrium concentration (6.4 µg/L), which satisfied the arsenic threshold for drinking water. Results of Fourier transform infrared and X-ray photoelectron spectroscopies indicated that the As(V) molecules bonded with the oxygen molecules, which were coordinated with FeO clusters in the framework. This work presented the potential use of the up-scaled MIL-88B as an excellent sorbent for purifying arsenate-contaminated water.

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Publication details

The article was received on 08 Oct 2017, accepted on 04 Jan 2018 and first published on 05 Jan 2018


Article type: Paper
DOI: 10.1039/C7DT03775A
Citation: Dalton Trans., 2018, Accepted Manuscript
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    Green synthesis and evaluation of iron-based metal–organic framework MIL-88B for the efficient decontamination of arsenate from water

    S. Hou, Y. Wu, L. Feng, W. Chen, Y. Wang, C. Morlay and F. Li, Dalton Trans., 2018, Accepted Manuscript , DOI: 10.1039/C7DT03775A

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