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GSA Annual Meeting in Phoenix, Arizona, USA - 2019

Paper No. 289-1
Presentation Time: 1:45 PM

SOLUBILITY CONSIDERATIONS OF URANIUM AND ORGANIC MATTER IN MINERALIZED DEPOSITS


CERRATO, Jose1, VELASCO, Carmen1, ARTYUSHKOVA, Kateryna2, ALI, Abdul-Mehdi S.3, OSBURN, Christopher4, GONZALEZ ESTRELLA, Jorge5, LEZAMA PACHECO, Juan S.6 and CABANISS, Stephen7, (1)MSC01 1070, MSC01 1070, 1 University of New Mexico, 1 University of New Mexico, Albuquerque, NM 87131-1070, (2)Department of Chemical and Biological Engineering, University of New Mexico, MSC01 1120, Albuquerque, NM 87131, (3)Department of Earth and Planetary Sciences, The University of New Mexico, Albuquerque, NM 87131-0001, (4)Department of Marine, Earth, and Atmospheric Sciences, NC State University, Raleigh, NC 27607, (5)Department of Civil and Environmental Engineering, University of New Mexico, Centennial Engineering Center (CEC) 300 Redondo W Dr, Albuquerque, NM 87106, Room 3020., Albuquerque, NM 87106, (6)SLAC National Accelerator Laboratory, Stanford Synchrotron Radiation Lightsource, 2575 Sand HIll Road Menlo Park CA MS 69, Menlo Park, CA 94025, (7)University of New Mexico, Albuquerque, NM 87131

We investigated the reaction of U and organic matter as a function of pH in solids from mineralized deposits and in controlled laboratory experiments with Suwanee River natural organic matter. This study integrated aqueous chemistry experiments, X-ray spectroscopy, excitation emission matrix spectroscopy, and electron microscopy. Phenolic and carbonyl functional groups were detected at higher intensities than carboxylic groups in supernatant samples from batch extractions conducted at pH 13, 7, and 2 with solids from mineralized deposits. The presence of U(IV) and U(VI) species was detected in the supernatant after batch extractions with solids from mineralized deposits conducted under oxidizing conditions. Additional experiments with Suwanee River natural organic matter indicate that precipitation reactions can affect U and organic matter solubility at pH 2 and 4. These results are relevant to well buffered surface waters and those affected by acid mine drainage in the proximity of uranium mineralized deposits.

Session No. 289

T34. Understanding Water Resources Related to Mineralized Uranium and Other Metal Deposits
Wednesday, 25 September 2019: 1:30 PM-5:30 PM
Room 131ABC, North Building (Phoenix Convention Center)
Geological Society of America Abstracts with Programs. Vol. 51, No. 5
doi: 10.1130/abs/2019AM-334542
© Copyright 2019 The Geological Society of America (GSA), all rights reserved. Permission is hereby granted to the author(s) of this abstract to reproduce and distribute it freely, for noncommercial purposes. Permission is hereby granted to any individual scientist to download a single copy of this electronic file and reproduce up to 20 paper copies for noncommercial purposes advancing science and education, including classroom use, providing all reproductions include the complete content shown here, including the author information. All other forms of reproduction and/or transmittal are prohibited without written permission from GSA Copyright Permissions.
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