文献类型：期刊文献

英文题名：Scavenging mechanism of rare earth metal ions in water by graphene oxide

作者：Li, Manli[1,2];Ji, Zhihao[1,2];Sheng, Guodong[3];Zhou, Shaodong[4];Chang, Kaikai[3];Jin, Enqi[3];Guo, Xiaojie[5]

机构：[1]Shaoxing Univ, Coll Text & Apparel, Shaoxing 312000, Peoples R China;[2]Key Lab Clean Dyeing & Finishing Technol Zhejiang, Shaoxing 312000, Peoples R China;[3]Shaoxing Univ, Coll Chem & Chem Engn, Shaoxing 312000, Peoples R China;[4]Zhejiang Univ, Coll Chem & Biochem Engn, Zhejiang Prov Key Lab Adv Chem Engn Manufacture T, Hangzhou 310027, Peoples R China;[5]Hangzhou Dianzi Univ, Coll Mat & Environm Engn, Hangzhou 310018, Peoples R China

年份：2021

卷号：322

外文期刊名：JOURNAL OF MOLECULAR LIQUIDS

收录：SCI-EXPANDED(收录号：WOS:000610834000102)、、EI(收录号：20205109651001)、Scopus(收录号：2-s2.0-85097655279)、WOS

基金：This work was financially supported by Zhejiang Provincial Natural Science Foundation of China (LQ19E030017), National Natural Science Foundation of China (21777102), Project of Key Laboratory of Clean Dyeing and Finishing Technology of Zhejiang Province (QJRZ1902), Technological Research Project for PublicWelfare of Zhejiang Province (LGG21E030005) and Project of the Young and Middle Aged Academic Cadres of Shaoxing University.

语种：英文

外文关键词：Graphene oxide; Adsorption; Rare earth metal ions; La(III); Nd(II); Scavenging mechanism

外文摘要：In order to investigate scavenging mechanism of rare earth metal ions in water by graphene oxide (GO), effects of ion concentration and adsorption time on the adsorption of the metal ions, such as La(III) and Nd(II), were surveyed systematically. The molecular structure, surface functional groups and morphology of the GO before and after adsorbing the rare earth metal ions were characterized by Raman spectroscopy, FITR, and XPS. To shed more light on the sorption mechanism, static density functional theory (DFT) calculation was introduced to portray the molecular-scale interaction between GO and the rare earth metal ions. The results indicated that the GO showed high adsorbing capacities of 105.5 mg/g for La( III) and 99.1 mg/g for Nd(II) at 20 degrees C and pH 5.5, respectively. The adsorption reached equilibriums within 120 min and the adsorption kinetics of La(III) and Nd(II) followed the pseudo-first-order kinetic model well. The Freundlich and Langmuir models were used to simulate the adsorption isotherms of the rare earth metal ions, demonstrating that the adsorption fitted well with Langmuir model. Experimental results of this work demonstrated that GO was a promising economical material for the removal of La(III) and Nd(II) from aqueous solutions. (C) 2020 Elsevier B.V. All rights reserved.