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Title: Partitioning of uranyl between ferrihydrite and humic substances at acidic and circum-neutral pH

As part of a larger study of the reactivity and mobility of uranyl (U(VI)O 2 2+) cations in subsurface environments containing natural organic matter (NOM) and hydrous ferric oxides, we have examined the effect of reference humic and fulvic substances on the sorption of uranyl on 2-line ferrihydrite (Fh), a common, naturally occurring nano-Fe(III)-hydroxide. Uranyl was reacted with Fh at pH 4.6 and 7.0 in the presence and absence of Elliott Soil Humic Acid (ESHA) (0–835 ppm) or Suwanee River Fulvic Acid (SRFA) (0–955 ppm). Here, no evidence was found for reduction of uranyl by either form of NOM after 24 h of exposure.
Authors:
 [1] ;  [2] ;  [3] ;  [3] ;  [4] ;  [5] ;  [6]
  1. Stanford Univ., Stanford, CA (United States); Ecole Polytechnique Federale de Lausanne (EPFL), Lausanne (Switzerland)
  2. Stanford Univ., Stanford, CA (United States); SLAC National Accelerator Lab., Menlo Park, CA (United States)
  3. Stanford Univ., Stanford, CA (United States)
  4. Stanford Univ., Stanford, CA (United States); Duke Univ., Durham, NC (United States)
  5. Duke Univ., Durham, NC (United States); Carnegie Mellon Univ., Pittsburgh, PA (United States)
  6. Stanford Univ., Stanford, CA (United States); SLAC National Accelerator Lab., Menlo Park, CA (United States); Duke Univ., Durham, NC (United States)
Publication Date:
Grant/Contract Number:
AC02-76SF00515
Type:
Accepted Manuscript
Journal Name:
Geochimica et Cosmochimica Acta
Additional Journal Information:
Journal Volume: 215; Journal Issue: C; Journal ID: ISSN 0016-7037
Publisher:
The Geochemical Society; The Meteoritical Society
Research Org:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org:
USDOE Office of Science (SC), Biological and Environmental Research (BER) (SC-23); National Science Foundation (NSF)
Country of Publication:
United States
Language:
English
Subject:
58 GEOSCIENCES; Uranium; Ferrihydrite; Organic matter; Humic acid; Fulvic acid; X ray absorption spectroscopy; Speciation
OSTI Identifier:
1394077

Dublet, Gabrielle, Lezama Pacheco, Juan, Bargar, John R., Fendorf, Scott, Kumar, Naresh, Lowry, Gregory V., and Brown, Jr., Gordon E.. Partitioning of uranyl between ferrihydrite and humic substances at acidic and circum-neutral pH. United States: N. p., Web. doi:10.1016/j.gca.2017.07.013.
Dublet, Gabrielle, Lezama Pacheco, Juan, Bargar, John R., Fendorf, Scott, Kumar, Naresh, Lowry, Gregory V., & Brown, Jr., Gordon E.. Partitioning of uranyl between ferrihydrite and humic substances at acidic and circum-neutral pH. United States. doi:10.1016/j.gca.2017.07.013.
Dublet, Gabrielle, Lezama Pacheco, Juan, Bargar, John R., Fendorf, Scott, Kumar, Naresh, Lowry, Gregory V., and Brown, Jr., Gordon E.. 2017. "Partitioning of uranyl between ferrihydrite and humic substances at acidic and circum-neutral pH". United States. doi:10.1016/j.gca.2017.07.013. https://www.osti.gov/servlets/purl/1394077.
@article{osti_1394077,
title = {Partitioning of uranyl between ferrihydrite and humic substances at acidic and circum-neutral pH},
author = {Dublet, Gabrielle and Lezama Pacheco, Juan and Bargar, John R. and Fendorf, Scott and Kumar, Naresh and Lowry, Gregory V. and Brown, Jr., Gordon E.},
abstractNote = {As part of a larger study of the reactivity and mobility of uranyl (U(VI)O22+) cations in subsurface environments containing natural organic matter (NOM) and hydrous ferric oxides, we have examined the effect of reference humic and fulvic substances on the sorption of uranyl on 2-line ferrihydrite (Fh), a common, naturally occurring nano-Fe(III)-hydroxide. Uranyl was reacted with Fh at pH 4.6 and 7.0 in the presence and absence of Elliott Soil Humic Acid (ESHA) (0–835 ppm) or Suwanee River Fulvic Acid (SRFA) (0–955 ppm). Here, no evidence was found for reduction of uranyl by either form of NOM after 24 h of exposure.},
doi = {10.1016/j.gca.2017.07.013},
journal = {Geochimica et Cosmochimica Acta},
number = C,
volume = 215,
place = {United States},
year = {2017},
month = {7}
}