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Adsorption of diuron and dichlobenil on multiwalled carbon nanotubes as affected by lead
Chen, Guang-Cai; Shan, Xiao-Quan; Pei, Zhi-Guo; Wang, Huanhua; Zheng, Li-Rong; Zhang, Jing; Xie, Ya-Ning
2011-04-15
Source PublicationJOURNAL OF HAZARDOUS MATERIALS
Volume188Issue:40911Pages:156—163
AbstractThe effect of lead on the adsorption of diuron and dichlobenil on multiwalled carbon nanotubes (MWCNTs) was investigated to explore the possible application of MWCNTs for removal of both herbicides from contaminated water. The adsorption of diuron and dichlobenil on MWCNTs at pH 6 was nonlinear and fit the Polanyi-Manes model well. The adsorption of diuron and dichlobenil was closely correlated with specific surface areas and micropore volumes of MWCNTs. An increase in oxygen content of MWCNTs with same diameters and similar surface areas decreased the adsorption of diuron and dichlobenil, while increased the adsorption of lead. Micro-Fourier transform infrared spectroscopic study indicated that hydrogen bonding is a main mechanism responsible for the adsorption of diuron or dichlobenil onto MWCNTs-O. Oxygen containing groups, mainly carboxylic groups, significantly increased the adsorption of lead through the formations of outer-sphere and inner-sphere complexes, which are verified by X-ray absorption spectroscopic measurements. Oxygen containing groups and the presence of lead diminished the adsorption of diuron and dichlobenil. The suppression mechanisms of lead were ascribed to hydration and complexation of lead with carboxylic groups, which may occupy part of surface of MWCNTs-O. The large hydration shell of lead cations may intrude or shield hydrophobic and hydrophilic sites, resulting in a decreased adsorption of diuron and dichlobenil at the lead-complexed moieties. (C) 2011 Elsevier B.V. All rights reserved.
Department环境化学与生态毒理学国家重点实验室
WOS IDWOS:000289334300022
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Cited Times:56[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.rcees.ac.cn/handle/311016/7069
Collection环境化学与生态毒理学国家重点实验室
Recommended Citation
GB/T 7714
Chen, Guang-Cai,Shan, Xiao-Quan,Pei, Zhi-Guo,et al. Adsorption of diuron and dichlobenil on multiwalled carbon nanotubes as affected by lead[J]. JOURNAL OF HAZARDOUS MATERIALS,2011,188(40911):156—163.
APA Chen, Guang-Cai.,Shan, Xiao-Quan.,Pei, Zhi-Guo.,Wang, Huanhua.,Zheng, Li-Rong.,...&Xie, Ya-Ning.(2011).Adsorption of diuron and dichlobenil on multiwalled carbon nanotubes as affected by lead.JOURNAL OF HAZARDOUS MATERIALS,188(40911),156—163.
MLA Chen, Guang-Cai,et al."Adsorption of diuron and dichlobenil on multiwalled carbon nanotubes as affected by lead".JOURNAL OF HAZARDOUS MATERIALS 188.40911(2011):156—163.
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