skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Actinide Sorption in Rainier Mesa Tunnel Waters from the Nevada Test Site

Abstract

The sorption behavior of americium (Am), plutonium (Pu), neptunium (Np), and uranium (U) in perched Rainier Mesa tunnel water was investigated. Both volcanic zeolitized tuff samples and groundwater samples were collected from Rainier Mesa, Nevada Test Site, NV for a series of batch sorption experiments. Sorption in groundwater with and without the presence of dissolved organic matter (DOM) was investigated. Am(III) and Pu(IV) are more soluble in groundwater that has high concentrations of DOM. The sorption K{sub d} for Am(III) and Pu(IV) on volcanic zeolitized tuff was up to two orders of magnitude lower in samples with high DOM (15 to 19 mg C/L) compared to samples with DOM removed (< 0.4 mg C/L) or samples with naturally low DOM (0.2 mg C/L). In contrast, Np(V) and U(VI) sorption to zeolitized tuff was much less affected by the presence of DOM. The Np(V) and U(VI) sorption Kds were low under all conditions. Importantly, the DOM was not found to significantly sorb to the zeolitized tuff during these experiment. The concentration of DOM in groundwater affects the transport behavior of actinides in the subsurface. The mobility of Am(III) and Pu(IV) is significantly higher in groundwater with elevated levels of DOM resultingmore » in potentially enhanced transport. To accurately model the transport behavior of actinides in groundwater at Rainier Mesa, the low actinide Kd values measured in groundwater with high DOM concentrations must be incorporated in predictive transport models.« less

Authors:
; ; ; ; ; ;
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
926020
Report Number(s):
LLNL-TR-400273
TRN: US0802523
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY; ACTINIDES; AMERICIUM; NEPTUNIUM; NEVADA TEST SITE; ORGANIC MATTER; PLUTONIUM; SORPTION; TRANSPORT; TUFF; URANIUM; WATER

Citation Formats

Zhao, P, Zavarin, M, Leif, R, Powell, B, Singleton, M, Lindvall, R, and Kersting, A. Actinide Sorption in Rainier Mesa Tunnel Waters from the Nevada Test Site. United States: N. p., 2007. Web. doi:10.2172/926020.
Zhao, P, Zavarin, M, Leif, R, Powell, B, Singleton, M, Lindvall, R, & Kersting, A. Actinide Sorption in Rainier Mesa Tunnel Waters from the Nevada Test Site. United States. doi:10.2172/926020.
Zhao, P, Zavarin, M, Leif, R, Powell, B, Singleton, M, Lindvall, R, and Kersting, A. Mon . "Actinide Sorption in Rainier Mesa Tunnel Waters from the Nevada Test Site". United States. doi:10.2172/926020. https://www.osti.gov/servlets/purl/926020.
@article{osti_926020,
title = {Actinide Sorption in Rainier Mesa Tunnel Waters from the Nevada Test Site},
author = {Zhao, P and Zavarin, M and Leif, R and Powell, B and Singleton, M and Lindvall, R and Kersting, A},
abstractNote = {The sorption behavior of americium (Am), plutonium (Pu), neptunium (Np), and uranium (U) in perched Rainier Mesa tunnel water was investigated. Both volcanic zeolitized tuff samples and groundwater samples were collected from Rainier Mesa, Nevada Test Site, NV for a series of batch sorption experiments. Sorption in groundwater with and without the presence of dissolved organic matter (DOM) was investigated. Am(III) and Pu(IV) are more soluble in groundwater that has high concentrations of DOM. The sorption K{sub d} for Am(III) and Pu(IV) on volcanic zeolitized tuff was up to two orders of magnitude lower in samples with high DOM (15 to 19 mg C/L) compared to samples with DOM removed (< 0.4 mg C/L) or samples with naturally low DOM (0.2 mg C/L). In contrast, Np(V) and U(VI) sorption to zeolitized tuff was much less affected by the presence of DOM. The Np(V) and U(VI) sorption Kds were low under all conditions. Importantly, the DOM was not found to significantly sorb to the zeolitized tuff during these experiment. The concentration of DOM in groundwater affects the transport behavior of actinides in the subsurface. The mobility of Am(III) and Pu(IV) is significantly higher in groundwater with elevated levels of DOM resulting in potentially enhanced transport. To accurately model the transport behavior of actinides in groundwater at Rainier Mesa, the low actinide Kd values measured in groundwater with high DOM concentrations must be incorporated in predictive transport models.},
doi = {10.2172/926020},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2007},
month = {12}
}

Technical Report:

Save / Share: