文献类型：期刊文献

英文题名：Adsorption Properties and Mechanism of Attapulgite to Graphene Oxide in Aqueous Solution

作者：Li, Na[1];Fang, Jiyuan[1];Jiang, Ping[1];Li, Cuihong[1];Kang, Haibo[2];Wang, Wei[1,3]

机构：[1]Shaoxing Univ, Sch Civil Engn, Shaoxing 312000, Peoples R China;[2]Nanjing Tech Univ, Sch Civil Engn, Coll Transportat Engn, Nanjing 210009, Peoples R China;[3]Natl Univ Singapore, Dept Civil & Environm Engn, Singapore 117576, Singapore

年份：2022

卷号：19

期号：5

外文期刊名：INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH

收录：SSCI(收录号：WOS:000768490500001)、SCI-EXPANDED(收录号：WOS:000768490500001)、、Scopus(收录号：2-s2.0-85125392712)、WOS

基金：FundingThis 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; attapulgite; adsorption isotherm; adsorption thermodynamics; adsorption kinetics

外文摘要：In order to remove toxic graphene oxide (GO) from aqueous solution, attapulgite (ATP) was used as adsorbent to recycle it by adsorption. In this paper, the effects of different pH, adsorbent mass, GO concentration, time and temperature on the adsorption of GO by attapulgite were studied, and the adsorption performance and mechanism were further explored by XRD, AFM, XPS, FTIR, TEM and SEM tests. The results show that when T = 303 K, pH = 3, and the GO concentration is 100 mg/L in 50 mL of aqueous solution, the removal rate of GO by 40 mg of attapulgite reaches 92.83%, and the partition coefficient K-d reaches 16.31. The adsorption kinetics results showed that the adsorption equilibrium was reached at 2160 min, and the adsorption process could be described by the pseudo-second-order adsorption equation, indicating that the adsorption process was accompanied by chemical adsorption and physical adsorption. The isotherm and thermodynamic parameters show that the adsorption of GO by attapulgite is more consistent with the Langmuir isotherm model, and the reaction is a spontaneous endothermic process. The analysis shows that attapulgite is a good material for removing GO, which can provide a reference for the removal of GO in an aqueous environment.