• 文献标题:   Investigation of the adsorption mechanisms of Pb(II) and 1-naphthol by beta-cyclodextrin modified graphene oxide nanosheets from aqueous solution
  • 文献类型:   Article
  • 作  者:   ZHENG HL, GAO Y, ZHU KR, WANG Q, WAKEEL M, WAHID A, ALHARBI NS, CHEN CL
  • 作者关键词:   adsorption, graphene oxide, betacyclodextrin, pb ii, 1naphthol
  • 出版物名称:   JOURNAL OF COLLOID INTERFACE SCIENCE
  • ISSN:   0021-9797 EI 1095-7103
  • 通讯作者地址:   Chinese Acad Sci
  • 被引频次:   22
  • DOI:   10.1016/j.jcis.2018.06.083
  • 出版年:   2018

▎ 摘  要

beta-cyclodextrin decorated graphene oxides (beta-CD-GO) was prepared by using an in-situ aggregation treatment, and used to remove inorganic (Pb(II)) and organic pollutants (1-naphthol) from water environment. The batch adsorption experiments of as-prepared beta-CD-GO were carried out as a function of pH values, initial Pb(II) and 1-naphthol concentration, ionic strength, contact time and temperature. beta-CD-GO kinetic results indicated that the adsorption was dominated by chemisorptions and followed a pseudo-second order model. The maximum adsorption capacities of beta-CD-GO toward Pb(II) and 1-naphtholon the base of the Langmuir model were 149.56 and 207.6 mg.g(-1) at 293 K, respectively. The thermodynamic experiments revealed that the adsorption of Pb(II) and 1-naphthol was spontaneous and endothermic. The surface compexation, hydrogen bonds and pi-pi interactions contributed to Pb(11) and 1-naphthol adsorption by means of the hydroxy and carboxyl functional groups on the surface of the beta-CD-GO. The experimental results indicate that the beta-CD-GO is an excellent composite for the elimination of Pb(II) and 1-naphthol from wastewater. (C) 2018 Elsevier Inc. All rights reserved.