NIMTE OpenIR  > 2018专题
Adsorption and co-adsorption of graphene oxide and Ni(II) on iron oxides: A spectroscopic and microscopic investigation
Sheng, Guodong; Huang, Chengcai; Chen, Guohe; Sheng, Jiang; Ren, Xuemei; Hu, Baowei; Ma, Jingyuan; Wang, Xiangke; Huang, Yuying; Alsaedi, Ahmed; Hayat, Tasawar
2018
发表期刊ENVIRONMENTAL POLLUTION
卷号233页码:125-131
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.
关键词Absorption Fine-structure Layered Double Hydroxide Arsenate Co-sorption Enhanced Sequestration Carbon Nanotubes Aqueous-solution Water Interface Heavy-metal Goethite Nanosheets
学科领域Materials Science ; Metallurgy & Metallurgical Engineering
语种英语
文献类型期刊论文
条目标识符http://ir.nimte.ac.cn/handle/174433/16837
专题2018专题
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GB/T 7714
Sheng, Guodong,Huang, Chengcai,Chen, Guohe,et al. Adsorption and co-adsorption of graphene oxide and Ni(II) on iron oxides: A spectroscopic and microscopic investigation[J]. ENVIRONMENTAL POLLUTION,2018,233:125-131.
APA Sheng, Guodong.,Huang, Chengcai.,Chen, Guohe.,Sheng, Jiang.,Ren, Xuemei.,...&Hayat, Tasawar.(2018).Adsorption and co-adsorption of graphene oxide and Ni(II) on iron oxides: A spectroscopic and microscopic investigation.ENVIRONMENTAL POLLUTION,233,125-131.
MLA Sheng, Guodong,et al."Adsorption and co-adsorption of graphene oxide and Ni(II) on iron oxides: A spectroscopic and microscopic investigation".ENVIRONMENTAL POLLUTION 233(2018):125-131.
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