Surface-bound humic acid increased Pb2+ sorption on carbon nanotubes
文献类型：期刊论文
| ; | |
| 作者 | Lin, DH; Tian, XL; Li, TT; Zhang, ZY; He, X; Xing, BS;张智勇; He X(何潇)
|
| 刊名 | ENVIRONMENTAL POLLUTION
 ; ENVIRONMENTAL POLLUTION
|
| 出版日期 | 2012 ; 2012 |
| 卷号 | 167页码:138-147 |
| 关键词 | Nanomaterials Natural organic matter Heavy metal Sorption Nanomaterials Natural organic matter Heavy metal Sorption |
| DOI | 10.1016/j.envpol.2012.03.044 |
| 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.; 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 ; Environmental Sciences & Ecology |
| 收录类别 | SCI |
| WOS记录号 | WOS:000305377300018 ; WOS:000305377300018 |
| 公开日期 | 2016-05-03 |
| 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, Surface-bound humic acid increased Pb2+ sorption on carbon nanotubes[J]. ENVIRONMENTAL POLLUTION, ENVIRONMENTAL POLLUTION,2012, 2012,167, 167:138-147, 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. |
入库方式： OAI收割
来源：高能物理研究所
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