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DOI | 10.1021/acs.est.7b04037 |
Carboxymethylcellulose Mediates the Transport of Carbon Nanotube-Magnetite Nanohybrid Aggregates in Water-Saturated Porous Media | |
Wang, Dengjun1; Park, Chang Min1,3; Masud, Arvid4; Rich, Nirupam4; Su, Chunming2 | |
发表日期 | 2017-11-07 |
ISSN | 0013-936X |
卷号 | 51期号:21页码:12405-12415 |
英文摘要 | Carbon-metal oxide nanohybrids (NHs) are increasingly recognized as the next-generation, promising group of nanomaterials for solving emerging environmental issues and challenges. This research, for the first time, systematically explored the transport and retention of carbon nanotube-magnetite (CNTFe3O4) NH aggregates in water-saturated porous media under environmentally relevant conditions. A macromolecule modifier, carboxymethylcellulose (CMC), was employed to stabilize the NHs. Our results show that transport of the magnetic CNT-Fe3O4 NHs was lower than that of nonmagnetic CNT due to larger hydrodynamic sizes of NHs (induced by magnetic attraction) and size-dependent retention in porous media. Classical Derjaguin-Landau-Verwey-Overbeek (DLVO) theory can explain the mobility of NHs under varying experimental conditions. However, in contrast with colloid filtration theory, a novel transport feature-an initial lower and a following sharphigher peaks occurred frequently in the NHs breakthrough curves. The magnitude and location of both transport peaks varied with different experimental conditions, due to the interplay between variability of fluid viscosity and size-selective retention of the NHs. Promisingly, the estimated maximum transport distance of NHs ranged between similar to 0.38 and 46 m, supporting the feasibility of employing the magnetically recyclable CNT-Fe3O4 NHs for in situ nanoremediation of contaminated soil, aquifer, and groundwater. |
语种 | 英语 |
WOS记录号 | WOS:000414887200041 |
来源期刊 | ENVIRONMENTAL SCIENCE & TECHNOLOGY
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来源机构 | 美国环保署 |
文献类型 | 期刊论文 |
条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/60341 |
作者单位 | 1.US EPA, Natl Res Council, 919 Kerr Res Dr, Ada, OK 74820 USA; 2.US EPA, Groundwater Watershed & Ecosyst Restorat Div, Natl Risk Management Res Lab, Off Res & Dev, 919 Kerr Res Dr, Ada, OK 74820 USA; 3.Kyungpook Natl Univ, Dept Environm Engn, Daegu 41566, South Korea; 4.Univ Buffalo State Univ New York, Dept Civil Struct & Environm Engn, Buffalo, NY 14260 USA |
推荐引用方式 GB/T 7714 | Wang, Dengjun,Park, Chang Min,Masud, Arvid,et al. Carboxymethylcellulose Mediates the Transport of Carbon Nanotube-Magnetite Nanohybrid Aggregates in Water-Saturated Porous Media[J]. 美国环保署,2017,51(21):12405-12415. |
APA | Wang, Dengjun,Park, Chang Min,Masud, Arvid,Rich, Nirupam,&Su, Chunming.(2017).Carboxymethylcellulose Mediates the Transport of Carbon Nanotube-Magnetite Nanohybrid Aggregates in Water-Saturated Porous Media.ENVIRONMENTAL SCIENCE & TECHNOLOGY,51(21),12405-12415. |
MLA | Wang, Dengjun,et al."Carboxymethylcellulose Mediates the Transport of Carbon Nanotube-Magnetite Nanohybrid Aggregates in Water-Saturated Porous Media".ENVIRONMENTAL SCIENCE & TECHNOLOGY 51.21(2017):12405-12415. |
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