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Title: Fiber-based adsorbents having high adsorption capacities for recovering dissolved metals and methods thereof

Abstract

A fiber-based adsorbent and a related method of manufacture are provided. The fiber-based adsorbent includes polymer fibers with grafted side chains and an increased surface area per unit weight over known fibers to increase the adsorption of dissolved metals, for example uranium, from aqueous solutions. The polymer fibers include a circular morphology in some embodiments, having a mean diameter of less than 15 microns, optionally less than about 1 micron. In other embodiments, the polymer fibers include a non-circular morphology, optionally defining multiple gear-shaped, winged-shaped or lobe-shaped projections along the length of the polymer fibers. A method for forming the fiber-based adsorbents includes irradiating high surface area polymer fibers, grafting with polymerizable reactive monomers, reacting the grafted fibers with hydroxylamine, and conditioning with an alkaline solution. High surface area fiber-based adsorbents formed according to the present method demonstrated a significantly improved uranium adsorption capacity per unit weight over existing adsorbents.

Inventors:
; ;
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1322105
Patent Number(s):
9,433,920
Application Number:
14/226,942
Assignee:
UT-Battelle, LLC (Oak Ridge, TN) ORNL
DOE Contract Number:  
AC05-00OR22725
Resource Type:
Patent
Resource Relation:
Patent File Date: 2014 Mar 27
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Janke, Christopher J., Dai, Sheng, and Oyola, Yatsandra. Fiber-based adsorbents having high adsorption capacities for recovering dissolved metals and methods thereof. United States: N. p., 2016. Web.
Janke, Christopher J., Dai, Sheng, & Oyola, Yatsandra. Fiber-based adsorbents having high adsorption capacities for recovering dissolved metals and methods thereof. United States.
Janke, Christopher J., Dai, Sheng, and Oyola, Yatsandra. Tue . "Fiber-based adsorbents having high adsorption capacities for recovering dissolved metals and methods thereof". United States. https://www.osti.gov/servlets/purl/1322105.
@article{osti_1322105,
title = {Fiber-based adsorbents having high adsorption capacities for recovering dissolved metals and methods thereof},
author = {Janke, Christopher J. and Dai, Sheng and Oyola, Yatsandra},
abstractNote = {A fiber-based adsorbent and a related method of manufacture are provided. The fiber-based adsorbent includes polymer fibers with grafted side chains and an increased surface area per unit weight over known fibers to increase the adsorption of dissolved metals, for example uranium, from aqueous solutions. The polymer fibers include a circular morphology in some embodiments, having a mean diameter of less than 15 microns, optionally less than about 1 micron. In other embodiments, the polymer fibers include a non-circular morphology, optionally defining multiple gear-shaped, winged-shaped or lobe-shaped projections along the length of the polymer fibers. A method for forming the fiber-based adsorbents includes irradiating high surface area polymer fibers, grafting with polymerizable reactive monomers, reacting the grafted fibers with hydroxylamine, and conditioning with an alkaline solution. High surface area fiber-based adsorbents formed according to the present method demonstrated a significantly improved uranium adsorption capacity per unit weight over existing adsorbents.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2016},
month = {9}
}

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