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HERO ID
955027
Reference Type
Journal Article
Title
Behavior of stabilized multiwalled carbon nanotubes in a FeCl3 coagulation system and the structure characteristics of the produced flocs
Author(s)
He, M; Zhou, R; Guo, X
Year
2012
Is Peer Reviewed?
Yes
Journal
Journal of Colloid and Interface Science
ISSN:
0021-9797
EISSN:
1095-7103
Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
Location
SAN DIEGO
Volume
366
Issue
1
Page Numbers
173-178
Language
English
PMID
22014394
DOI
10.1016/j.jcis.2011.09.059
Web of Science Id
WOS:000297385900025
Abstract
The understanding of the fate and the transport of carbon nanotubes (CNTs) in the water treatment process will provide important information for assessing the environmental risks of CNTs. To fill the knowledge gap, this study investigated the removability of multiwalled carbon nanotubes (MWNTs) stabilized by humic acid (HA) during the coagulation-flocculation-sedimentation (CFS) process. The structure characteristics of the produced flocs were systematically investigated using a variety of characterization approaches. The configuration resembling a root-soil system is shown in the images of scanning and transmission electron microscopy (SEM and TEM). With the incorporation of HA-MWNTs into the produced flocs, the X-ray diffraction (XRD) patterns of MWNTs completely disappeared. Fourier transform infrared spectra (FT-IR) and Mössbauer spectra suggested that the intervention of HA-hinged MWNTs increased the degree of polymerization and the particle size of the produced hydrous ferric oxide (HFO). Finally, both the effective sequestration of MWNTs by CFS demonstrated here and the high sorption capacity of MWNTs for phenanthrene implied that MWNTs might be used as a potential coagulant aid in water processing for the enhanced removal of hydrophobic organic chemicals.
Keywords
Coagulation; Flocs; Mössbauer spectra; Multi-wall carbon nanotubes (MWNTs); Removal
Tags
Other
•
Nanoscale Carbon
All References Cited
External Review Draft
Introduction
Transport and Fate
Analytical Methods
Peer Reviewed Draft
Introduction
Transport & Fate
Priority Area: Ch. 3 and Appendix D
Final Case Study
Introduction
Transport & Fate
Priority Area: Ch. 3 and Appendix D
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