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Performance and mechanism of GO removal by gypsum from aqueous solution  ( SCI-EXPANDED收录 EI收录)   被引量:1

文献类型:期刊文献

英文题名:Performance and mechanism of GO removal by gypsum from aqueous solution

作者:Jiang, Ping[1];Zhou, Guanzhong[1];Li, Cuihong[1];Yu, Yanfei[1];Zhou, Lin[1];Kang, Haibo[2]

机构:[1]Shaoxing Univ, Sch Civil Engn, Shaoxing 312000, Zhejiang, Peoples R China;[2]Nanjing Tech Univ, Coll Transportat Sci & Engn, Sch Civil Engn, Nanjing 210009, Peoples R China

年份:0

外文期刊名:ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH

收录:SCI-EXPANDED(收录号:WOS:000925746300003)、、EI(收录号:20242816664896)、Scopus(收录号:2-s2.0-85147369356)、WOS

基金:This research was funded by the National Natural Science Foundation of China (41772311, 52179107), China Scholarship Council (201607910002), and the Research Fund of Zhejiang Provincial Department of Housing and Urban-Rural Development (2017K179, 2016K130).

语种:英文

外文关键词:Graphene oxide; Gypsum; Isotherm; Adsorption test; Thermodynamics; Microscopic characterization

外文摘要:The widespread production and application of graphene oxide (GO) may lead to its dispersion throughout natural water systems, with potential negative effects on living organisms and the ecological environment. This study used gypsum (G) as an adsorbent and examined different conditions (pH, adsorbent dosage, GO initial concentration) for the removal effect of GO by G. The results showed the best adsorption effect for a solution pH of 8.0, gypsum dosage of 60 mg, initial GO concentration of 80 mg center dot L-1, and temperature of 303 K; at this time, the maximum removal rate of graphene oxide by gypsum was 93.3%. It could be obtained by isotherm and thermodynamic analysis that the GO adsorption by gypsum conforms to the Langmuir isotherm model, it does not easily occur in high-temperature environments, and is a spontaneous exothermic process. In addition, experiments such as SEM, AFM, TGA, XRD, XPS, FTIR, Raman, and Zeta were used to adsorb graphene oxide by gypsum composites (G/GO), through which the mineral interactions with graphene oxides were microscopically characterized. The impact on the adsorption properties of contaminants provides new insights into contaminant removal by gypsum.

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