Enhanced sequestration of selenite in water by nanoscale zero valent iron immobilization on carbon nanotubes by a combined batch, XPS and XAFS investigation
Sheng, GD; Alsaedi, A; Shammakh, W; Monaquel, S; Sheng, J; Wang, XK; Li, H; Huang, YY; Sheng, GD (reprint author), Shaoxing Univ, Coll Chem & Chem Engn, Shaoxing 312000, Zhejiang, Peoples R China.
2016
发表期刊CARBON
ISSN0008-6223
卷号99期号:-页码:123—130
文章类型期刊文献
摘要In this paper, nanoscale zero-valent iron (NZVI) immobilized on carbon nanotube (CNT) composite (NZVI/CNT) was prepared, characterized and used for the sequestration of Se(IV) in water. The structural analysis revealed that NZVI were uniformly immobilized on CNT surfaces, and thus the oxidation and aggregation of NZVI was obviously minimized. Compared to bare NZVI, the NZVI/CNT exhibited much higher efficiency on Se(IV) sequestration due to the good synergistic effect between CNT adsorption and NZVI reduction. The results from X-ray absorption fine structure (XAFS) revealed that Se(IV) could be almost completely reduced into Se(0)/Se(-II) by NZVI/CNT, while partial reduction occurred on NZVI with a trace of Se(IV) adsorbed on the corrosion products. Besides, the role of pH in Se(IV) sequestration on NZVI/CNT was lower than that on NZVI due to the buffering effect of CNT. Moreover, CNT immobilization could also weaken the inhibition effect of humic acid (HA) on the removal of Se(IV) by NZVI, since CNT showed strong adsorption for HA that blocks potential reactivity. The excellent performance of NZVI/CNT offer a promising material for detoxification of Se(IV) from wastewater. (C) 2015 Elsevier Ltd. All rights reserved.
关键词Humic Substance Interaction Natural Organic-matter Zerovalent Iron Pillared Bentonite Plates Fe-0-cnts Methylene-blue Model-compound Waste-water Removal Reduction
DOI10.1016/j.carbon.2015.12.013
收录类别SCI
语种英语
WOS记录号WOS:000369069800015
引用统计
被引频次:85[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.sinap.ac.cn/handle/331007/25717
专题中科院上海应用物理研究所2011-2018年
通讯作者Sheng, GD (reprint author), Shaoxing Univ, Coll Chem & Chem Engn, Shaoxing 312000, Zhejiang, Peoples R China.
推荐引用方式
GB/T 7714
Sheng, GD,Alsaedi, A,Shammakh, W,et al. Enhanced sequestration of selenite in water by nanoscale zero valent iron immobilization on carbon nanotubes by a combined batch, XPS and XAFS investigation[J]. CARBON,2016,99(-):123—130.
APA Sheng, GD.,Alsaedi, A.,Shammakh, W.,Monaquel, S.,Sheng, J.,...&Sheng, GD .(2016).Enhanced sequestration of selenite in water by nanoscale zero valent iron immobilization on carbon nanotubes by a combined batch, XPS and XAFS investigation.CARBON,99(-),123—130.
MLA Sheng, GD,et al."Enhanced sequestration of selenite in water by nanoscale zero valent iron immobilization on carbon nanotubes by a combined batch, XPS and XAFS investigation".CARBON 99.-(2016):123—130.
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