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Title: Silane coupling and mordanting as attachment techniques for pyridylazo and thiazolylazo ligands in the synthesis of adsorbents for uranium in seawater

Abstract

Activated carbon adsorbents modified with azo compounds (4-(2-pyridylazo)resorcinol, 1-(2-pyridylazo)-2-naphthol, 4-(2-thiazolylazo)resorcinol), or with allyl and vinylbenzyl derivatives of 4-(2-thiazolylazo)resorcinol, were observed to be highly effective in removing uranium from seawater and providing high loadings. Adsorbents consisting of azo compounds attached to fiber fabrics were prepared using silane coupling to attach azo reagents to silica fibers or mordanting agents such as tannic acid or aluminum acetate to attach them to cellulose fibers. Loadings of 15–45 mg U g-1 adsorbent were obtained. Scanning electron microscopy/energy dispersive X-ray spectroscopy measurements confirmed the presence of high concentrations of uranium on the surface of the silica-based and cellulose-based fibers.

Authors:
 [1];  [1];  [1];  [2];  [1]
  1. The Catholic Univ. of America, Washington, DC (United States)
  2. Univ. of Maryland, College Park, MD (United States)
Publication Date:
Research Org.:
Univ. of Maryland, College Park, MD (United States); The Catholic Univ. of America, Washington, DC (United States)
Sponsoring Org.:
USDOE Office of Nuclear Energy (NE)
OSTI Identifier:
1498891
Grant/Contract Number:  
NE0000723
Resource Type:
Accepted Manuscript
Journal Name:
Adsorption Science and Technology
Additional Journal Information:
Journal Volume: 36; Journal Issue: 3-4; Journal ID: ISSN 0263-6174
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; uranium; seawater; azo dyes; silanization; mordants

Citation Formats

Pooley, Grace M., Adel-Hadadi, Mohammad A., Li, Weixing, Dietz, Travis C., and Barkatt, Aaron. Silane coupling and mordanting as attachment techniques for pyridylazo and thiazolylazo ligands in the synthesis of adsorbents for uranium in seawater. United States: N. p., 2018. Web. doi:10.1177/0263617418755170.
Pooley, Grace M., Adel-Hadadi, Mohammad A., Li, Weixing, Dietz, Travis C., & Barkatt, Aaron. Silane coupling and mordanting as attachment techniques for pyridylazo and thiazolylazo ligands in the synthesis of adsorbents for uranium in seawater. United States. doi:10.1177/0263617418755170.
Pooley, Grace M., Adel-Hadadi, Mohammad A., Li, Weixing, Dietz, Travis C., and Barkatt, Aaron. Tue . "Silane coupling and mordanting as attachment techniques for pyridylazo and thiazolylazo ligands in the synthesis of adsorbents for uranium in seawater". United States. doi:10.1177/0263617418755170. https://www.osti.gov/servlets/purl/1498891.
@article{osti_1498891,
title = {Silane coupling and mordanting as attachment techniques for pyridylazo and thiazolylazo ligands in the synthesis of adsorbents for uranium in seawater},
author = {Pooley, Grace M. and Adel-Hadadi, Mohammad A. and Li, Weixing and Dietz, Travis C. and Barkatt, Aaron},
abstractNote = {Activated carbon adsorbents modified with azo compounds (4-(2-pyridylazo)resorcinol, 1-(2-pyridylazo)-2-naphthol, 4-(2-thiazolylazo)resorcinol), or with allyl and vinylbenzyl derivatives of 4-(2-thiazolylazo)resorcinol, were observed to be highly effective in removing uranium from seawater and providing high loadings. Adsorbents consisting of azo compounds attached to fiber fabrics were prepared using silane coupling to attach azo reagents to silica fibers or mordanting agents such as tannic acid or aluminum acetate to attach them to cellulose fibers. Loadings of 15–45 mg U g-1 adsorbent were obtained. Scanning electron microscopy/energy dispersive X-ray spectroscopy measurements confirmed the presence of high concentrations of uranium on the surface of the silica-based and cellulose-based fibers.},
doi = {10.1177/0263617418755170},
journal = {Adsorption Science and Technology},
number = 3-4,
volume = 36,
place = {United States},
year = {2018},
month = {1}
}

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