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Polymers 2018, 10(7), 750; https://doi.org/10.3390/polym10070750

Fabrication of Composite Beads Based on Calcium Alginate and Tetraethylenepentamine-Functionalized MIL-101 for Adsorption of Pb(II) from Aqueous Solutions

School of Food and Pharmacy, Zhejiang Ocean University, Zhoushan 316022, China
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Received: 14 June 2018 / Revised: 2 July 2018 / Accepted: 5 July 2018 / Published: 6 July 2018
(This article belongs to the Special Issue Renewable Polymer Composites)
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Abstract

In this work, a tetraethylenepentamine (TEPA)-grafted metal-organic framework material (MIL-101) was synthesized. The introduction of TEPA increased the abundance of functional groups on the MIL-101. As a powdery adsorbent, MIL-101-TEPA can be difficult to separate. In order to solve this problem, we combined MIL-101-TEPA with sodium alginate (SA) and injected the mixture into a CaCl2 solution to solidify the powder into beads with a particle size of 3 mm. The easily recovered adsorbent was applied to the adsorption of Pb(II) from water. The structure and characterization of the adsorbent were investigated through scanning electron microscope (SEM), Fourier-transform infrared spectroscopy (FTIR), X-Ray diffraction (XRD), thermogravimetric analysis (TGA), and X-ray photoelectron spectroscopy (XPS). We also optimized the adsorption conditions. The results of the study showed that the adsorption process was chemisorptive and endothermic in nature. The maximum adsorption capacity of the composite beads was 558.6 mg/g. Meanwhile MIL-101-TEPA@CA showed good repeatable utilization. View Full-Text
Keywords: sodium alginate; functional MIL-101; composite beads; adsorption; Pb(II) sodium alginate; functional MIL-101; composite beads; adsorption; Pb(II)
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Wang, N.; Yang, L.-Y.; Wang, Y.-G.; Ouyang, X.-K. Fabrication of Composite Beads Based on Calcium Alginate and Tetraethylenepentamine-Functionalized MIL-101 for Adsorption of Pb(II) from Aqueous Solutions. Polymers 2018, 10, 750.

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