文献类型：期刊文献

英文题名：Impact of contact time, pH, ionic strength, soil humic substances, and temperature on the uptake of Pb(II) onto graphene oxide

作者：Li, Xue[1,2];Zhao, Kang[1];You, Caiyin[1];Pan, Hui[2];Tang, Xiaoping[2];Fang, Yanfeng[2]

机构：[1]Xian Univ Technol, Sch Mat Sci & Engn, Xian 710048, Peoples R China;[2]Shaoxing Univ, Coll Yuanpei, Shaoxing, Peoples R China

年份：2017

卷号：52

期号：6

起止页码：987

外文期刊名：SEPARATION SCIENCE AND TECHNOLOGY

收录：SCI-EXPANDED(收录号：WOS:000399643200003)、、EI(收录号：20170803382060)、Scopus(收录号：2-s2.0-85013380434)、WOS

基金：Financial support from the National Natural Science Foundation of China (51372199) is acknowledged.

语种：英文

外文关键词：Graphene oxide; Pb(II); uptake; water quality parameters

外文摘要：The uptake of Pb(II) from wastewaters onto graphene oxide was studied as a function of various water quality parameters. The results indicated that uptake was fast and kinetic uptake could be well fitted by a pseudo-second-order model. The uptake was strongly dependent on pH and independent of ionic strength. Namely, inner-sphere surface complexation was the main uptake mechanism. The presence of humic acid or fulvic acid enhanced the uptake at low pH values, while reduced at high pH. The Langmuir, Freundlich, and Dubinin-Redushkevich (D-R) isotherm models were used to simulate the uptake. Thermodynamics indicated that the uptake was endothermic and spontaneous.