NDLI: Design of Chitosan-Grafted Carbon Nanotubes: Evaluation of How the –OH Functional Group Affects Cs+ Adsorption

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Design of Chitosan-Grafted Carbon Nanotubes: Evaluation of How the –OH Functional Group Affects Cs+ Adsorption

Content Provider	MDPI
Author	Yang, Shubin Shao, Dadong Wang, Xiangke Hou, Guangshun Nagatsu, Masaaki Tan, Xiaoli Ren, Xuemei Yu, Jitao
Abstract	In order to explore the effect of –OH functional groups in Cs+ adsorption, we herein used the low temperature plasma-induced grafting method to graft chitosan onto carbon nanotubes (denoted as CTS-g-CNTs), as raw-CNTs have few functional groups and chitosan has a large number of –OH functional groups. The synthesized CTS-g-CNT composites were characterized using different techniques. The effect of –OH functional groups in the Cs+ adsorption process was evaluated by comparison of the adsorption properties of raw-CNTs with and without grafting chitosan. The variation of environmental conditions such as pH and contact time was investigated. A comparison of contaminated seawater and simulated groundwater was also evaluated. The results indicated that: (1) the adsorption of Cs+ ions was strongly dependent on pH and the competitive cations; (2) for CNT-based material, the –OH functional groups have a positive effect on Cs+ removal; (3) simulated contaminated groundwater can be used to model contaminated seawater to evaluate the adsorption property of CNTs-based material. These results showed direct observational evidence on the effect of –OH functional groups for Cs+ adsorption. Our findings are important in providing future directions to design and to choose effective material to remedy the removal of radioactive cesium from contaminated groundwater and seawater, crucial for public health and the human social environment.
File Size	1035264
Ending Page	3131
Page Count	16
Starting Page	3116
File Format	PDF
e-ISSN	16603397
DOI	10.3390/md13053116
Journal	Marine Drugs
Issue Number	5
Volume Number	13
Language	English
Publisher Date	2015-05-20
Access Restriction	Open
Subject Keyword	carbon nanotube (CNTs) chitosan $Cs^{+}$ adsorption –OH functional groups
Content Type	Text
Resource Type	Article

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