文献类型：期刊文献

英文题名：Adsorption and co-adsorption of graphene oxide and Ni(II) on iron oxides: A spectroscopic and microscopic investigation

作者：Sheng, Guodong[1,2];Huang, Chengcai[2];Chen, Guohe[2];Sheng, Jiang[4];Ren, Xuemei[5];Hu, Baowei[2];Ma, Jingyuan[3];Wang, Xiangke[1,2,6];Huang, Yuying[3];Alsaedi, Ahmed[6];Hayat, Tasawar[6,7]

机构：[1]North China Elect Power Univ, Sch Environm & Chem Engn, Beijing 102206, Peoples R China;[2]Shaoxing Univ, Coll Life Sci, Coll Chem & Chem Engn, Shaoxing 312000, Zhejiang, Peoples R China;[3]Chinese Acad Sci, Shanghai Inst Appl Phys, SSRF, Shanghai 201204, Peoples R China;[4]Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Ningbo 315201, Zhejiang, Peoples R China;[5]Chinese Acad Sci, Inst Plasma Phys, POB 1126, Hefei 230031, Anhui, Peoples R China;[6]King Abdulaziz Univ, Fac Sci, Dept Math, NAAM Res Grp, Jeddah 21589, Saudi Arabia;[7]Quaid I Azam Univ, Dept Math, Islamabad 44000, Pakistan

年份：2018

卷号：233

起止页码：125

外文期刊名：ENVIRONMENTAL POLLUTION

收录：SCI-EXPANDED(收录号：WOS:000424177000015)、、EI(收录号：20174304297436)、Scopus(收录号：2-s2.0-85031783039)、WOS

基金：Financial supports from the Natural Science Foundation of Zhejiang Province (LY15B070001) and China Postdoctoral Science Foundation Grant (2016M591140, 2017T100055) are greatly acknowledged. The authors thank beamline BL14W1 (Shanghai Synchrotron Radiation Facility) for providing the beam time.

语种：英文

外文关键词：Graphene oxide; Iron oxides; Mutual interaction

外文摘要：Graphene oxide (GO) may strongly interact with toxic metal ions and mineral particles upon release into the soil environment. We evaluated the mutual effects between GO and Ni (Ni(II)) with regard to their adsorption and co-adsorption on two minerals (goethite and hematite) in aqueous phase. Results indicated that GO and Ni could mutually facilitate the adsorption of each other on both goethite and hematite over a wide pH range. Addition of Ni promoted GO co-adsorption mainly due to the increased positive charge of minerals and cation it interactions, while the presence of GO enhanced Ni co-adsorption predominantly due to neutralization of positive charge and strong interaction with oxygen containing functional groups on adsorbed GO. Increasing adsorption of GO and Ni on minerals as they coexist may thus reduce their mobility in soil. Extended X-ray absorption fine structure (EXAFS) spectroscopy data revealed that GO altered the microstructure of Ni on minerals, i.e., Ni formed edge-sharing surface species (at RNi-Fe similar to 3.2 angstrom) without GO, while a GO-bridging ternary surface complexes (at RNi-C similar to 2.49 angstrom A and RNi-Fe similar to 4.23 angstrom) was formed with GO. These findings improved the understanding of potential fate and toxicity of GO as well as the partitioning processes of Ni ions in aquatic and soil environments. (C) 2017 Elsevier Ltd. All rights reserved.