Surface-bound humic acid increased Pb2+ sorption on carbon nanotubes

	Surface-bound humic acid increased Pb2+ sorption on carbon nanotubes
	Lin, DH; Tian, XL; Li, TT; Zhang, ZY; He, X; Xing, BS;张智勇; He X(何潇)
刊名	ENVIRONMENTAL POLLUTION
	2012
卷号	167 页码:138-147
关键词	Nanomaterials Natural organic matter Heavy metal Sorption
英文摘要	Solid humic acid (HA) particles were dissolved and subsequently coated on a type of multiwalled carbon nanotubes (MWCNTs). Pb2+ sorption from water by the solid HA, the MWCNTs and the obtained HA-MWCNT complexes was compared. The underlying mechanism of the difference in the sorption was discussed with the data at different pHs, results of desorption in the presence and absence of Ca2+ and the characterizations using inductively coupled plasma mass spectrometry, X-ray energy dispersion spectroscopy and X-ray absorption fine structure spectroscopy. The effect of MWCNT-contained impurities on the sorption was also examined. It was shown that the surface-bound HA introduced oxygen-containing functional groups and negative charges on the MWCNTs, thus greatly increasing Pb2+ sorption on the MWCNTs. Pb2+ could be electrostatically attracted into outer-sphere of the electric double layer of the HA-MWCNT complexes, a fraction of which would form coordination complexes with carboxyl groups in the inner- and/or outer-sphere. (C) 2012 Elsevier Ltd. All rights reserved.
学科主题	Environmental Sciences & Ecology
收录类别	SCI
WOS记录号	WOS:000305377300018
公开日期	2016-05-03
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/223864]
专题	中国科学院高能物理研究所
推荐引用方式 GB/T 7714	Lin, DH,Tian, XL,Li, TT,et al. Surface-bound humic acid increased Pb2+ sorption on carbon nanotubes[J]. ENVIRONMENTAL POLLUTION,2012,167:138-147.
APA	Lin, DH.,Tian, XL.,Li, TT.,Zhang, ZY.,He, X.,...&何潇.(2012).Surface-bound humic acid increased Pb2+ sorption on carbon nanotubes.ENVIRONMENTAL POLLUTION,167,138-147.
MLA	Lin, DH,et al."Surface-bound humic acid increased Pb2+ sorption on carbon nanotubes".ENVIRONMENTAL POLLUTION 167(2012):138-147.