文献类型：期刊文献

英文题名：Anchoring nanoscale iron sulfide onto graphene oxide for the highly efficient immobilization of uranium (VI) from aqueous solutions

作者：Li, Li[1];Wu, Hui[1];Chen, Junjie[1];Xu, Lingxia[1];Sheng, Guodong[1];Fang, Ping[1];Du, Kui[1];Shen, Chao[2];Guo, Xiaojie[3]

机构：[1]Shaoxing Univ, Coll Chem & Chem Engn, Huancheng West Rd 508, Shaoxing 312000, Zhejiang, Peoples R China;[2]Zhejiang Shuren Univ, Coll Biol & Environm Engn, Hangzhou 310015, Zhejiang, Peoples R China;[3]Hangzhou Dianzi Univ, Coll Mat & Environm Engn, Hangzhou 310018, Zhejiang, Peoples R China

年份：2021

卷号：332

外文期刊名：JOURNAL OF MOLECULAR LIQUIDS

收录：SCI-EXPANDED(收录号：WOS:000644949400089)、、EI(收录号：20211210106100)、Scopus(收录号：2-s2.0-85102631675)、WOS

基金：The work was supported by the National Natural Science Foundation of China (21777102). We also sincerely thank the young and middleaged academic cadres from Shaoxing University.

语种：英文

外文关键词：Graphene oxide; U(VI); Iron sulfide; Immobilization mechanism

外文摘要：Uranium is one of the most important radioactive elements using in the nuclear technology application, but it is hazardous for environment and human health because of its high mobility and toxicity. Hence, designing effective materials for uranium immobilization is highly desirable. In this paper, a novel adsorbent of GO/FeS prepared using a simple and convenient manner, by anchoring graphene oxide on nanoscale FeS was investigated for the immobilization of U(VI) from aqueous solutions. The mechanism of U(VI) immobilized onto GO/FeS was unveiled by X-ray photoelectron spectroscopy (XPS). The results revealed that FeS nanoparticles were successfully anchored onto GO surface, resulting in more reactive sites than pristine FeS or GO. Impressively, it was found that GO/FeS can enhance the immobilization of U(VI), leading to high adsorption capacity up to 347.2 mg/g. The kinetics of U(VI) immobilization was in accordance with the pseudo-second order kinetic model, and the isotherm of U(VI) immobilization was described by the D-R model, indicating chemical interaction mainly contributed to U(VI) immobilization on GO/FeS. The synergy between surface adsorption and reduction/precipitation mainly accounted for the immobilization mechanisms of U(VI) on GO/FeS, making GO/FeS to be as potential materials for remediation of U(VI)-contaminated wastewater. (C) 2021 Elsevier B.V. All rights reserved.