文献类型：期刊文献

英文题名：New insights into colloidal GO, Cr(VI) and Fe(II) interaction by a combined batch, spectroscopic and DFT calculation investigation

作者：Chen, Junjie[1];Wu, Hui[1];Xu, Lingxia[1];Li, Manli[2];Du, Kui[1];Sheng, Guodong[1]

机构：[1]Shaoxing Univ, Zhejiang Engn Res Ctr Fat Soluble Vitamin, Sch Chem & Chem Engn, Shaoxing 312000, Zhejiang, Peoples R China;[2]Shaoxing Univ, Coll Text & Apparel, Key Lab Clean Dyeing & Finishing Technol Zhejiang, Shaoxing 312000, Zhejiang, Peoples R China

年份：2021

卷号：337

外文期刊名：JOURNAL OF MOLECULAR LIQUIDS

收录：SCI-EXPANDED(收录号：WOS:000681039600030)、、EI(收录号：20212010359424)、Scopus(收录号：2-s2.0-85105759113)、WOS

基金：The work was supported by the National Natural Science Foundation of China (21777102). We also sincerely thank the young and middle-aged academic cadres from Shaoxing University. Prof. S. Zhou from Zhejiang university was great appreciated for the DFT calculations.

语种：英文

外文关键词：Graphene oxide; Cr(VI); Fe(II); Colloidal interaction

外文摘要：In this paper, a variety of experimental techniques including batch equilibrium reactions, density functional theory (DFT) theoretical calculation, and X-ray spectroscopic techniques, were utilized to investigate the colloidal GO, Cr(VI) and Fe(II) interaction. The results indicated that a Cr(III)-Fe(III) precipitate could be formed when Fe(II) was added in Cr(VI) solution, and then Cr(VI) was adsorbed on the neoformed precipitate. The kinetics for all systems can be described by the pseudo-second-order model the best, suggesting chemical reaction mainly contributed to colloidal GO, Cr(VI) and Fe(II) interaction. There co-existed reductive and oxidative functional group on GO surfaces simultaneously, leading to the reduction Cr(VI) into Cr(III), and/or oxidation of Fe(II) into Fe(III), when Fe(II) and Cr(VI) were adsorbed on GO, individually. Furthermore, in comparison with individual GO and Fe(II) in solution, more Cr(VI) could be reduced into Cr(III) via Fe(II)-treated GO, due to the much higher reactivity of GO adsorbed Fe(II). So, GO demonstrated excellent adsorption and reduction capacity for Cr(VI) in the presence of Fe(II). These findings are vital to apply GO in the elimination of Cr(VI) from wastewater. (C) 2021 Elsevier B.V. All rights reserved.