Journal ArticleDOI
Removal of U(VI) from aqueous solutions by using MWCNTs and chitosan modified MWCNTs.
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TLDR
In this paper, the multwalled carbon nanotubes (MWCNTs) were modified with chitosan (CS) by using low temperature plasma grafting technique (denoted as MWCNT-CS).Abstract:
In this paper, the multiwalled carbon nanotubes (MWCNTs) were modified with chitosan (CS) by using low temperature plasma grafting technique (denoted as MWCNT-CS). The prepared MWCNTs and MWCNT-CS were characterized by SEM, TEM, FTIR and Raman spectroscopy in detail and the results suggested that CS molecules were successfully grafted on the surfaces of MWCNTs. The materials were applied as adsorbents in the removal of U(VI) ions from large volumes of aqueous solutions as a function of environmental conditions. The removal of U(VI) from aqueous solution to MWCNTs and MWCNT-CS increased with increasing pH values at pH 7. The sorption of U(VI) on MWCNTs and MWCNT-CS was strongly dependent on pH and independent of ionic strength. The sorption of U(VI) on MWCNTs and MWCNT-CS was dominated by inner-sphere surface complexation rather than by ion exchange or outer-sphere surface complexation. The surface grafted chitosan molecules can enhances U(VI) sorption on MWCNTs obviously, which was also evidenced from the XPS spectroscopy analysis. The results of high sorption capacity of U(VI) on MWCNT-CS suggest that the MWCNT-CS nanomaterial is a suitable candidate in the preconcentration of U(VI) ions from large volumes of aqueous solutions.read more
Citations
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Journal ArticleDOI
Recent Modifications of Chitosan for Adsorption Applications: A Critical and Systematic Review
TL;DR: This work summarizes the published works of the last three years regarding the modification reactions of chitosans (grafting, cross-linking, etc.) and their application to adsorption of different environmental pollutants (in liquid-phase).
Journal ArticleDOI
Emerging natural and tailored materials for uranium-contaminated water treatment and environmental remediation
Yi Xie,Yi Xie,Changlun Chen,Changlun Chen,Changlun Chen,Xuemei Ren,Xiangxue Wang,Haiyan Wang,Xiangke Wang,Xiangke Wang +9 more
TL;DR: In this article, the authors provide a systematic and comprehensive overview of the researches conducted from 2005 to 2018 for removing uranium from aqueous solution by these emerging materials, including inorganic materials (e.g., clay minerals, metal oxides, mesoporous silica), organic polymers, carbon family materials, and porous framework materials.
Posted Content
Sorption of Eu(III) on Attapulgite Studied by Batch, XPS and EXAFS Techniques
TL;DR: In this paper, the effects of pH, ionic strength and temperature on the sorption of Eu(III) on attapulgite were investigated in the presence and absence of fulvic acid (FA) and humic acid (HA).
Journal ArticleDOI
Amidoxime-grafted multiwalled carbon nanotubes by plasma techniques for efficient removal of uranium(VI)
TL;DR: In this article, a solid phase extractant, amidoxime-grafted multiwalled carbon nanotubes (AO-g-MWCNTs), has been synthesized using plasma techniques to selectively separate uranium from nuclear industrial effluents.
Journal ArticleDOI
Facile synthesis of alumina-decorated multi-walled carbon nanotubes for simultaneous adsorption of cadmium ion and trichloroethylene
Jie Liang,Junfeng Liu,Xingzhong Yuan,Haoran Dong,Guangming Zeng,Haipeng Wu,Hou Wang,Jiayu Liu,Shanshan Hua,Shuqu Zhang,Zhigang Yu,Xiaoxiao He,Yan He +12 more
TL;DR: An adsorbent was prepared by decorating alumina onto the surface of multi-wall carbon nanotubes (MWCNTs) for simultaneous removal of cadmium ion (Cd(II) ion) and trichloroethylene (TCE) from groundwater as discussed by the authors.
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