Next Article in Journal
Dynamic Fracture Behavior of Steel Fiber Reinforced Self-Compacting Concretes (SFRSCCs)
Next Article in Special Issue
Inorganic Membranes: Preparation and Application for Water Treatment and Desalination
Previous Article in Journal
Effects of Nano-Aluminum Nitride on the Performance of an Ultrahigh-Temperature Inorganic Phosphate Adhesive Cured at Room Temperature
Previous Article in Special Issue
The Effect of Hydrogen Bonding in Enhancing the Ionic Affinities of Immobilized Monoprotic Phosphate Ligands
Article Menu
Issue 11 (November) cover image

Export Article

Open AccessFeature PaperArticle
Materials 2017, 10(11), 1268;

Amidoxime Polymers for Uranium Adsorption: Influence of Comonomers and Temperature

School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA
Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA
Author to whom correspondence should be addressed.
Received: 27 September 2017 / Revised: 27 October 2017 / Accepted: 31 October 2017 / Published: 4 November 2017
(This article belongs to the Special Issue Sorption Materials for Environment Purification)
Full-Text   |   PDF [3590 KB, uploaded 8 November 2017]   |  


Recovering uranium from seawater has been the subject of many studies for decades, and has recently seen significant progress in materials development since the U.S. Department of Energy (DOE) has become involved. With DOE direction, the uranium uptake for amidoxime-based polymer adsorbents has more than tripled in capacity. In an effort to better understand how these new adsorbent materials behave under different environmental stimuli, several experimental and modeling based studies have been employed to investigate impacts of competing ions, salinity, pH, and other factors on uranium uptake. For this study, the effect of temperature and type of comonomer on uranium adsorption by three different amidoxime adsorbents (AF1, 38H, AI8) was examined. Experimental measurements of uranium uptake were taken in 1−L batch reactors from 10 to 40 °C. A chemisorption model was developed and applied in order to estimate unknown system parameters through optimization. Experimental results demonstrated that the overall uranium chemisorption process for all three materials is endothermic, which was also mirrored in the model results. Model simulations show very good agreement with the data and were able to predict the temperature effect on uranium adsorption as experimental conditions changed. This model may be used for predicting uranium uptake by other amidoxime materials. View Full-Text
Keywords: uranium adsorption; amidoxime; comonomer; seawater; temperature effect; modeling uranium adsorption; amidoxime; comonomer; seawater; temperature effect; modeling

Graphical abstract

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

Share & Cite This Article

MDPI and ACS Style

Ladshaw, A.P.; Wiechert, A.I.; Das, S.; Yiacoumi, S.; Tsouris, C. Amidoxime Polymers for Uranium Adsorption: Influence of Comonomers and Temperature. Materials 2017, 10, 1268.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics



[Return to top]
Materials EISSN 1996-1944 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top