Polyethylenimine-functionalized silk sericin beads for high-performance remediation of hexavalent chromium from aqueous solution

Chemosphere
Hyo Won Kwak, Ki Hoon Lee

Abstract

The enhancement of the metal adsorption and remediation performance of biomass-based adsorbents is an important challenge in heavy metal removal processes. One of the most viable and practical approaches in accomplishing a high metal removal efficiency is the surface modification of natural polymer adsorbents with functional polymeric materials. In the present study, polyethylenimine (PEI)-modified silk sericin beads were fabricated. The PEI modification process was confirmed and analyzed by Fourier transform infrared spectroscopy (FTIR), field emission-scanning electron microscopy (FE-SEM), and energy-dispersive X-ray spectroscopy (EDS)-based elemental analysis. The Cr(VI) remediation capabilities of PEI-modified sericin beads were analyzed by testing Cr(VI) removal from contaminated water. The results show that the Cr(VI) removal capacity of PEI-modified sericin beads was 365.3 mg/g, which is significantly higher than that of pristine sericin beads (34.56 mg/g). During the Cr(VI) removal process, Cr(VI) adsorption and reduction to Cr(III) occurred simultaneously. The results herein reveal that the synthesized PEI-modified sericin beads are a promising material for Cr(VI) adsorption and detoxification of aqueous solution.

Citations

Aug 28, 2019·Environmental Science and Pollution Research International·Linfeng JinLiyuan Zhang
Jul 1, 2020·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Jun WangJianbing Ji
Sep 20, 2020·Environmental Science and Pollution Research International·Anita SinghBrijnandan S Dehiya
Feb 10, 2021·Colloids and Surfaces. B, Biointerfaces·Xinyi LiZhigang Xu
Aug 4, 2021·International Journal of Biological Macromolecules·Pornchai RachtanapunKittisak Jantanasakulwong
Oct 9, 2021·Scientific Reports·Thanongsak ChaiyasoKittisak Jantanasakulwong

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