Adsorption of diuron and dichlobenil on multiwalled carbon nanotubes as affected by lead

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 环境化学与生态毒理学国家重点实验室

	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
刊名	JOURNAL OF HAZARDOUS MATERIALS
	2011-04-15
卷号	188 期号:40911 页码:156—163
中文摘要	The 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.
WOS记录号	WOS:000289334300022
公开日期	2012-10-18
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/7069]
专题	生态环境研究中心_环境化学与生态毒理学国家重点实验室
推荐引用方式 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.