Abstract
Phosphoric acid is generally obtained from an aqueous process starting with the reaction between phosphate rock and sulphuric acid. Due to their chemical similarity, uranium is usually associated with phosphate rock which during chemical processing is partitioned to phosphoric acid. Uranium determination in this matrix is a very important task because of its ingestion it could lead to radiological impact on the population. Therefore, a procedure was developed using an initial precipitation with calcium hydroxide and evaporation, followed by instrumental neutron activation analysis (INAA). The procedure was applied to analyse fourteen uranium enriched phosphoric acid samples.
Similar content being viewed by others
References
Kratz, S., Schnug, E.: In: Merkel, B.J., Hasche-Berger, A. (eds.) Uranium in the Environment—Mining Impact and Consequences, Chap. 5. Springer, Berlin (2006)
Falck, W.E., Wymer, D.: In: Merkel, B.J., Hasche-Berger, A. (eds.) Uranium in the Environment—Mining Impact and Consequences, Chap. 89. Springer, Berlin (2006)
Silva, N.C., Fernandes, E.A.N., Cipriani, M., Taddei, M.H.T.: J. Radioanal. Nucl. Chem. 249, 251 (2001)
Saueia, C.H.R., Mazzilli, B.P., Favaro, D.I.T.: J. Environ. Radioactiv. 264, 445 (2005)
Erdem, E., Tinkiliç, N., Turan Yilmaz, V., Uyanik, A., Ölmez, H.: Fertilizer Res. 44, 129 (1996)
Fukuma, H.T., Fernandes, E.A.N., Quinelato, A.L.: Radiochim. Acta 88, 809 (2000)
Bunus, F., Domocos, V., Bulaceanu, R., Dumitrescu, P., Popescu, G.: J. Radioanal. Nucl. Chem. 33, 251 (1976)
Slack, A.V.: Phosphoric Acid, p. 777. Marcel Dekker Inc, New York (1968)
Becker, P.: Phosphate and Phosphoric Acid, p. 585. Marcel Dekker Inc., New York (1983)
Fukuma, H.T., Fernandes, E.A.N., Nascimento, M.R.L., Quinelato, A.L.: J. Radioanal. Nucl. Chem. 248, 549 (2001)
Acknowledgments
Authors are thankful to FAPEMIG—“Fundação de Amparo à Pesquisa do Estado de Minas Gerais”—for financial assistance, and to staff of CNEN/LAPOC, CNEN/IPEN and LRI/CENA/USP for their valuable contribution that made this work possible.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Silva, N.C., Macacini, J.F., Fukuma, H.T. et al. Determination of uranium in phosphoric acid using neutron activation analysis. J Radioanal Nucl Chem 281, 211–213 (2009). https://doi.org/10.1007/s10967-009-0116-5
Received:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s10967-009-0116-5