Enhanced adsorption of arsenate on the aminated fibers: sorption behavior and uptake mechanism

Deng, Shubo, Yu, Gang, Xie, Sihuang, Yu, Qiang, Huang, Jun, Kuwaki, Yasuyuki and Iseki, Masahiro (2008) Enhanced adsorption of arsenate on the aminated fibers: sorption behavior and uptake mechanism. Langmuir, 24 19: 10961-10967. doi:10.1021/la8023138


Author Deng, Shubo
Yu, Gang
Xie, Sihuang
Yu, Qiang
Huang, Jun
Kuwaki, Yasuyuki
Iseki, Masahiro
Title Enhanced adsorption of arsenate on the aminated fibers: sorption behavior and uptake mechanism
Journal name Langmuir   Check publisher's open access policy
ISSN 0743-7463
1520-5827
Publication date 2008-10-07
Sub-type Article (original research)
DOI 10.1021/la8023138
Volume 24
Issue 19
Start page 10961
End page 10967
Total pages 7
Place of publication Washington, DC, United States
Publisher American Chemical Society
Language eng
Abstract Novel aminated polyacrylonitrile fibers (APANFs) were prepared through the reaction of polyacrylonitrile fibers (PANFs) with four multinitrogen-containing aminating reagents, and the best adsorbent was obtained after the optimization of preparation experiments. The APANFs were effective for arsenate removal from aqueous solution, and the sorption behaviors including kinetics, isotherms, effect of pH, and competitive anions were investigated. Experimental results show that the equilibrium of arsenate sorption on the fibers was achieved within 1 h, and Langmuir equation described the sorption isotherms well with a high sorption capacity of 256.1 mg/g obtained. The thermodynamic parameters calculated show that the sorption was spontaneous and exothermic under the condition applied. The zero point of ζ potential of the APANFs was at about pH = 8.2, in contrast with that of the PANFs at pH = 3.6. Fourier transform infrared (FTIR) and X-ray photoelectron spectroscopy (XPS) for the APANFs before and after arsenate adsorption revealed that the amine groups on the fiber surface played an important role in the removal of arsenate from water, attributed to the electrostatic interaction between the positive protonated amine groups and negative arsenate ions.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Civil Engineering Publications
 
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Created: Fri, 24 Oct 2014, 02:19:41 EST by Sihuang Xie on behalf of School of Civil Engineering