Uranium(VI) Reduction by Nanoscale Zerovalent Iron in Anoxic Batch Systems
Abstract
This study investigated the influences of pH, bicarbonate, and calcium on U(VI) adsorption and reduction by synthetic nanosize zero valent iron (nano Fe0) particles under an anoxic condition. The results showed that about 87.1%, 82.7% and 78.3% of U(VI) could be reduced within 96 hours in the presence of 10 mM bicarbonate at pHs 6.92, 8.03 and 9.03, respectively. The rates of U(VI) reduction and adsorption by nano Fe0, however, varied significantly with increasing pH and concentrations of bicarbonate and/or calcium. Solid phase analysis by X-ray photoelectron spectroscopy confirmed the formation of UO2 and iron (hydr)oxides as a result of the redox interactions between adsorbed U(VI) and nano Fe0. This study highlights the potential important role of groundwater chemical composition in controlling the rates of U(VI) reductive immobilization using nano Fe0 in subsurface environments.
- Authors:
- Publication Date:
- Research Org.:
- Pacific Northwest National Lab. (PNNL), Richland, WA (United States). Environmental Molecular Sciences Lab. (EMSL)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 993664
- Report Number(s):
- PNNL-SA-68628
Journal ID: ISSN 0013-936X; ESTHAG; 31295; KP1501040; TRN: US1008104
- DOE Contract Number:
- AC05-76RL01830
- Resource Type:
- Journal Article
- Journal Name:
- Environmental Science & Technology, 44(20):7783-7789
- Additional Journal Information:
- Journal Volume: 44; Journal Issue: 20; Journal ID: ISSN 0013-936X
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 54 ENVIRONMENTAL SCIENCES; ACID CARBONATES; ADSORPTION; CALCIUM; CHEMICAL COMPOSITION; IRON; X-RAY PHOTOELECTRON SPECTROSCOPY; zero valent iron, Uranium, adsorption, reduction, immobilization, nanoparticles; Environmental Molecular Sciences Laboratory
Citation Formats
Yan, Sen, Hua, Bin, Bao, Zhengyu, Yang, John, Liu, Chongxuan, and Deng, Baolin. Uranium(VI) Reduction by Nanoscale Zerovalent Iron in Anoxic Batch Systems. United States: N. p., 2010.
Web. doi:10.1021/es9036308.
Yan, Sen, Hua, Bin, Bao, Zhengyu, Yang, John, Liu, Chongxuan, & Deng, Baolin. Uranium(VI) Reduction by Nanoscale Zerovalent Iron in Anoxic Batch Systems. United States. https://doi.org/10.1021/es9036308
Yan, Sen, Hua, Bin, Bao, Zhengyu, Yang, John, Liu, Chongxuan, and Deng, Baolin. 2010.
"Uranium(VI) Reduction by Nanoscale Zerovalent Iron in Anoxic Batch Systems". United States. https://doi.org/10.1021/es9036308.
@article{osti_993664,
title = {Uranium(VI) Reduction by Nanoscale Zerovalent Iron in Anoxic Batch Systems},
author = {Yan, Sen and Hua, Bin and Bao, Zhengyu and Yang, John and Liu, Chongxuan and Deng, Baolin},
abstractNote = {This study investigated the influences of pH, bicarbonate, and calcium on U(VI) adsorption and reduction by synthetic nanosize zero valent iron (nano Fe0) particles under an anoxic condition. The results showed that about 87.1%, 82.7% and 78.3% of U(VI) could be reduced within 96 hours in the presence of 10 mM bicarbonate at pHs 6.92, 8.03 and 9.03, respectively. The rates of U(VI) reduction and adsorption by nano Fe0, however, varied significantly with increasing pH and concentrations of bicarbonate and/or calcium. Solid phase analysis by X-ray photoelectron spectroscopy confirmed the formation of UO2 and iron (hydr)oxides as a result of the redox interactions between adsorbed U(VI) and nano Fe0. This study highlights the potential important role of groundwater chemical composition in controlling the rates of U(VI) reductive immobilization using nano Fe0 in subsurface environments.},
doi = {10.1021/es9036308},
url = {https://www.osti.gov/biblio/993664},
journal = {Environmental Science & Technology, 44(20):7783-7789},
issn = {0013-936X},
number = 20,
volume = 44,
place = {United States},
year = {Wed Nov 17 00:00:00 EST 2010},
month = {Wed Nov 17 00:00:00 EST 2010}
}