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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)
2012
发表期刊ENVIRONMENTAL POLLUTION
卷号167页码:138-147
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.
关键词Nanomaterials Natural organic matter Heavy metal Sorption
学科领域Environmental Sciences & Ecology
DOI10.1016/j.envpol.2012.03.044
收录类别SCI
WOS记录号WOS:000305377300018
引用统计
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/223864
专题多学科研究中心
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.
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