Microbial interactions with phosphorus containing glasses representative of vitrified radioactive waste.

Autor: Thorpe CL; Immobilization Science Laboratory, Sir Robert Hadfield Building, University of Sheffield, S1 3JD, UK. Electronic address: clare.thorpe@sheffield.ac.uk., Crawford R; Immobilization Science Laboratory, Sir Robert Hadfield Building, University of Sheffield, S1 3JD, UK., Hand RJ; Immobilization Science Laboratory, Sir Robert Hadfield Building, University of Sheffield, S1 3JD, UK., Radford JT; Immobilization Science Laboratory, Sir Robert Hadfield Building, University of Sheffield, S1 3JD, UK., Corkhill CL; Immobilization Science Laboratory, Sir Robert Hadfield Building, University of Sheffield, S1 3JD, UK; School of Earth Sciences, The University of Bristol, Bristol, UK., Pearce CI; Pacific Northwest National Laboratory, Richland, WA, USA., Neeway JJ; Pacific Northwest National Laboratory, Richland, WA, USA., Plymale AE; Pacific Northwest National Laboratory, Richland, WA, USA., Kruger AA; Office of River Protection, US Department of Energy, Richland, WA, USA., Morris K; Williamson Research Centre and Research Centre for Radwaste Disposal, Williamson Building, University of Manchester, 176 Oxford Road, M13 9PL, UK., Boothman C; Williamson Research Centre and Research Centre for Radwaste Disposal, Williamson Building, University of Manchester, 176 Oxford Road, M13 9PL, UK., Lloyd JR; Williamson Research Centre and Research Centre for Radwaste Disposal, Williamson Building, University of Manchester, 176 Oxford Road, M13 9PL, UK.
Jazyk: angličtina
Zdroj: Journal of hazardous materials [J Hazard Mater] 2024 Jan 15; Vol. 462, pp. 132667. Date of Electronic Publication: 2023 Sep 29.
DOI: 10.1016/j.jhazmat.2023.132667
Abstrakt: The presence of phosphorus in borosilicate glass (at 0.1 - 1.3 mol% P 2 O 5 ) and in iron-phosphate glass (at 53 mol% P 2 O 5 ) stimulated the growth and metabolic activity of anaerobic bacteria in model systems. Dissolution of these phosphorus containing glasses was either inhibited or accelerated by microbial metabolic activity, depending on the solution chemistry and the glass composition. The breakdown of organic carbon to volatile fatty acids increased glass dissolution. The interaction of microbially reduced Fe(II) with phosphorus-containing glass under anoxic conditions decreased dissolution rates, whereas the interaction of Fe(III) with phosphorus-containing glass under oxic conditions increased glass dissolution. Phosphorus addition to borosilicate glasses did not significantly affect the microbial species present, however, the diversity of the microbial community was enhanced on the surface of the iron phosphate glass. Results demonstrate the potential for microbes to influence the geochemistry of radioactive waste disposal environments with implication for wasteform durability.
Competing Interests: Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2023 The Authors. Published by Elsevier B.V. All rights reserved.)
Databáze: MEDLINE