文献类型：期刊文献

英文题名：Coadsorption of copper and perfluorooctane sulfonate onto multi-walled carbon nanotubes

作者：Zhou, Yanping[1] Wen, Bei[1] Pei, Zhiguo[1] Chen, Guangcai[2] Lv, Jitao[1] Fang, Jing[3] Shan, Xiaoquan[1] Zhang, Shuzhen[1]

第一作者：Zhou, Yanping

通信作者：Wen, B[1]

机构：[1]Chinese Acad Sci, State Key Lab Environm Chem & Ecotoxicol, Res Ctr Ecoenvironm Sci, Beijing 100085, Peoples R China;[2]Chinese Acad Forestry, Res Inst Subtrop Forestry, Fuyang 311400, Zhejiang, Peoples R China;[3]Zhejiang Gongshang Univ, Sch Environm Sci & Engn, Hangzhou 310012, Zhejiang, Peoples R China

年份：2012

卷号：203

起止页码：148-157

外文期刊名：CHEMICAL ENGINEERING JOURNAL

收录：;EI(收录号：20123615406742);Scopus(收录号：2-s2.0-84865637509);WOS:【SCI-EXPANDED(收录号:WOS:000309630300019)】；

基金：This work was funded by the National Basic Research Program of China (Project 2011CB936001) and the National Natural Science Foundation of China (Grant Nos. 41071308, 21007057). We gratefully acknowledge Dr. Lirong Zheng and Prof. Jing Zhang (Beijing Synchrotron Radiation Laboratory, Institute of High Energy Physics, Chinese Academy of Sciences) for technical assistance during the XAS experiments.

语种：英文

外文关键词：Co-adsorption; Desorption; PFOS; Cu(II); MWCNTs; X-ray absorption spectroscopy

摘要：Multi-walled carbon nanotubes (MWCNTs) are superadsorbents for perfluorooctane sulfonate (PFOS) and heavy metals, which coexist in wastewater. The interaction between PFOS and Cu(II) with regard to their adsorption and desorption on MWCNTs was evaluated in this study. The adsorption of PFOS on MWCNTs enhanced with an increase of Cu(II). Desorption of PFOS showed no hysteresis without Cu(II), while pronounced hysteresis with Cu(II). Increases of the adsorption and the occurrence of desorption hysteresis of PFOS in the presence of Cu(II) may due to the PFOS adsorption via a Cu(II) bridge. The adsorption of Cu(II) increased with an increase of PFOS. The desorption hysteresis factors in the presence of PFOS were lower than those in the absence of PFOS. Increases of the adsorption and decreases of desorption hysteresis factors may be attributed to the Cu(II) adsorption via a PFOS bridge. Results obtained by X-ray absorption spectroscopy verified the formation of inner-sphere complexes between Cu(II) and functional groups of MWCNTs without PFOS, while out-sphere complexes with large amount of PFOS. The effect of Cu(II) and PFOS adsorption on the zeta potential of MWCNTs was also studied. The results showed that the coexistence of Cu(II) and PFOS greatly affects their sorption and desorption behaviors on MWCNTs thereby their fate and transport in wastewater. (C) 2012 Elsevier B.V. All rights reserved.