文献类型：期刊文献

英文题名：Adsorption properties and mechanism of sepiolite to graphene oxide in aqueous solution

作者：Li, Na[1];Yan, Xinyu[1];Dai, Wenhao[1];Lv, Beifeng[1];Wang, Wei[1]

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

年份：2023

卷号：16

期号：4

外文期刊名：ARABIAN JOURNAL OF CHEMISTRY

收录：SCI-EXPANDED(收录号：WOS:000926880500001)、、EI(收录号：20230613559012)、Scopus(收录号：2-s2.0-85147435652)、WOS

基金：This research was funded by the National Natural Science Foundation of China (Grant No.52179107) .

语种：英文

外文关键词：Sepiolite; Graphene oxide; Adsorption mechanism; Adsorption isotherm; Adsorption dynamics

外文摘要：Graphene oxide (GO) is widely used in various fields such as improving the performance of cement-based materials and making composite materials due to its large specific surface area and abundant oxygen-containing functional groups. However, it has also caused water pollution. To remove GO in aqueous solution, sepiolite (SEP) was used to adsorb it. The effects of pH, adsorbent quality, GO concentration, temperature and adsorption time on the ability of SEP to adsorb GO were investigated. The materials were characterized by SAP and laser particle size analyzer, and the adsorption performance and mechanism of SEP for GO were further analyzed by XRD, FTIR, SEM, TEM, XPS, AFM, and Zeta potential microscopic tests. The results showed that: 1) Under the conditions of temperature 303 K, pH = 3, adsorbent mass 30 mg, and initial concentration of GO 100 mg/L, the adsorption effect was the best, and the adsorption rate reached 94.8 %. 2) The adsorption reached equilibrium at 2160 min, and the adsorption process was more in line with the pseudo-second-order adsorption kinetic equation, and the adsorption behavior was controlled by chemical effects. 3) The adsorption of SEP to GO is more consistent with the Langmuir and Temkin adsorption isotherm model, and the reaction is a spontaneous, endothermic, and entropy-increasing process. Experiments showed that SEP had a strong adsorption capacity for GO, which provides a reference for the treatment of toxic GO in aqueous solution and the realization of water ecological protection. (c) 2023 Published by Elsevier B.V. on behalf of King Saud University. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).