• 文献标题:   Tartaric acid modified graphene oxide as a novel adsorbent for high-efficiently removal of Cu(II) and Pb(II) from aqueous solutions
  • 文献类型:   Article
  • 作  者:   WANG ZH, YUE BY, TENG J, JIAO FP, JIANG XY, YU JG, ZHONG M, CHEN XQ
  • 作者关键词:   graphene oxide, tartaric acid, functionalization, adsorption, copper, lead
  • 出版物名称:   JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
  • ISSN:   1876-1070 EI 1876-1089
  • 通讯作者地址:   Cent S Univ
  • 被引频次:   28
  • DOI:   10.1016/j.jtice.2016.06.018
  • 出版年:   2016

▎ 摘  要

A novel adsorbent, tartaric acid modified graphene oxide (GO-TA), was successfully prepared by a simple esterification reaction and applied to remove Cu(II) and Pb(II) metal ions from aqueous solutions. The obtained composites were characterized by Fourier transform infrared (FT-IR) spectroscopy, Raman spectroscopy and transmission electron microscopy (TEM). Batch experiments were carried out to investigate the effect of pH value, contact time, concentration of metal ions and temperature on Cu(II) and Pb(II) adsorption. The maximum adsorption capacities for Cu(II) and Pb(II) are 374.53 mg g(-1) and 125.63 mg g(-1), respectively, which were higher than those of pristine graphene oxide (GO). The obtained experimental data showed a good correlation with the Langmuir adsorption model. The adsorption kinetics of Cu(II) and Pb(II) onto GO-TA composite was found to be well fit for the pseudo-second-order model. Moreover, thermodynamic parameters including Delta G(theta) < 0, Delta H-theta > 0 and Delta S-theta > 0, indicating that the adsorption of Cu(II) and Pb(II) onto GO-TA composite was spontaneous and endothermic in nature. All these results indicated that GO-TA composite with such high adsorption efficiency and fast adsorption equilibrium could be used to clean up heavy metal pollution in the future. (C) 2016 Taiwan Institute of Chemical Engineers. Published by Elsevier B.V. All rights reserved.