文献类型：期刊文献

英文题名：Interfacial interaction of graphene oxide with Na-montmorillonite and its effect on the U(VI) retention properties of Na-montmorillonite

作者：Wang, Wei[1];Xu, Huan[3];Ren, Xuemei[3];Deng, Liping[1,2]

机构：[1]Shaoxing Univ, Coll Yuanpei, Shaoxing 312000, Peoples R China;[2]Shaoxing Univ, Coll Chem & Chem Engn, Shaoxing 312000, Peoples R China;[3]Chinese Acad Sci, Inst Plasma Phys, CAS Key Lab Photovolta & Energy Conservat Mat, POB 1126, Hefei 230031, Anhui, Peoples R China

年份：2019

卷号：276

起止页码：919

外文期刊名：JOURNAL OF MOLECULAR LIQUIDS

收录：SCI-EXPANDED(收录号：WOS:000459528600101)、、EI(收录号：20190106333853)、Scopus(收录号：2-s2.0-85059299771)、WOS

基金：Financial supports from Anhui Provincial Natural Science Foundation (1608085QB44), the National Natural Science Foundation of China (21477133), and the Special Foundation for Young Scientists of Key Lab of Photovoltaic and Energy Conservation Materials (PECL2018QN004). Key Lab of Photovoltaic and Energy Conservation Materials, Chinese Academy of Sciences is acknowledged.

语种：英文

外文关键词：Graphene oxide; Na-montmorillonite; U(VI); Sorption; Binary sorbent

外文摘要：Little is known on the interaction of graphene oxide (GO) with layered clay mineral and its effects on the U(VI) retention properties of layered clay mineral. In this study, the interaction of GO with Na-montmorillonite (denoted as MMT in this study) typical of layered clay mineral is characterized in detail. Besides, the differences between single (i.e., GO or MMT) and binary adsorbent system for U(VI) sorption as a function of contact time, pH and sorption isotherms are studied. The results show that after GO is added to MMT, there is a change in morphology, interlayer spacing, surface area, surface charge, surface functional groups and consequently U(VI) retention properties of MMT. GO with much smaller particle size can enter the interlayer as well as distribute on the surface of MMT, which provides more active binding sites for increasing the maximum sorption capacity of MMT for U(VI) by >50% at pH 5.0. This study provides a systematical study of U(VI) migration in single and binary geological media by combining macroscopic and microscopic investigations, which can facilitate the assessment of co-migration of GO and radionuclide in environments. (C) 2018 Published by Elsevier B.V.