文献类型：期刊文献

英文题名：Using graphene oxide as a superior adsorbent for the highly efficient immobilization of Cu(II) from aqueous solution

作者：Li, Xue[1];Tang, Xiaoping[1];Fang, Yanfeng[1]

机构：[1]Shaoxing Univ, Coll Yuanpei, Shaoxing 312000, Peoples R China

年份：2014

卷号：199

起止页码：237

外文期刊名：JOURNAL OF MOLECULAR LIQUIDS

收录：SCI-EXPANDED(收录号：WOS:000345179500037)、、EI(收录号：20144000077617)、Scopus(收录号：2-s2.0-84907258931)、WOS

基金：Financial support from the National Natural Science Foundation of China (11204180) and the Scientific Research Project of Shaoxing University Yuanpei College (A2012004) are acknowledged.

语种：英文

外文关键词：Graphene oxide; Cu(II); Adsorption; Humic acid; Fulvic acid

外文摘要：The uptake of Cu(II) on graphene oxide (GO) by an adsorption process as a function of solution pH and ionic strength in the absence and presence of humic acid (HA) or fulvic acid (FA) was studied by using a batch technique. The results indicated that the uptake of Cu(II) on GO was clearly dependent on solution pH but independent on ionic strength. A positive effect of HA or FA on Cu(II) uptake on GO was found at low pH, whereas a negative effect of HA or FA on Cu(II) uptake on GO was observed at high pH. The adsorption isotherms of Cu(II) on GO can be described better by the Langmuir model than by the Freundlich model. The thermodynamic data calculated from temperature-dependent uptake of Cu(II) on GO suggested that the adsorption process was spontaneous and enhanced at higher temperature. Results of this work suggest that GO may be a promising candidate for the efficient immobilization of Cu(II) and related heavy metal ions from aqueous solutions. (C) 2014 Elsevier B.V. All rights reserved.