文献类型：期刊文献

英文题名：Performance and mechanisms of fly ash for graphene oxide removal from aqueous solution

作者：Jiang, Ping[1];Zhou, Lin[1];Wang, Wei[1];Li, Na[1];Zhang, Fang[1]

机构：[1]Shaoxing Univ, Sch Civil Engn, Shaoxing 312000, Zhejiang, Peoples R China

年份：2022

卷号：29

期号：3

起止页码：3773

外文期刊名：ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH

收录：SCI-EXPANDED(收录号：WOS:000684906500006)、、Scopus(收录号：2-s2.0-85112530891)、WOS

基金：This research was funded by the National Natural Science Foundation of China (Grant number [41772311]), the Zhejiang Provincial Natural Science Foundation of China (Grant number [LQ20E080005]), the Open Research Fund of Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering of Hohai University (Grant number [2019020]) and the Open Research Fund of State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Science (Grant number [Z017013]).

语种：英文

外文关键词：Graphene oxide; Fly ash; Adsorption; Mechanism; Isotherms; Thermodynamic

外文摘要：The potential wide use of graphene oxide in various fields results in the possibility of its dispersion throughout natural water systems, with a negative impact on organisms and ecosystems. This study evaluated the removal of graphene oxide (GO) from water by fly ash (FA). The effects of various conditions (including the initial concentration of graphene oxide, the pH of the initial solution, the amount of absorbent, and temperature) on the removal rate of GO were investigated in detail. The results show that the maximum removal rate of graphene oxide by fly ash is 93%; the isotherm adsorption process conforms to a Langmuir model; the adsorption reaction is a spontaneous exothermic process. Under optimal conditions, the pH of the solution was adjusted to 6, the amount of fly ash was 5 mg, the initial concentration of GO was 60 mg center dot L-1, and the temperature was 303 K. Using X-ray diffraction (XRD), Raman spectroscopy (Raman), Fourier transform infrared spectroscopy (FTIR), scanning electron microscope (SEM), transmission electron microscopy (TEM), Zeta potential and X-ray electron spectroscopy (XPS), the adsorption mechanism was characterized. The experimental results demonstrate that fly ash is a good material for GO removal from aqueous solution.