Removal of cobalt from lubricant oil by the use of bentonite: equilibrium, kinetic and adsorption preliminary studies
DOI:
https://doi.org/10.15392/bjrs.v7i2A.564Keywords:
lubricant oil, bentonite, sorption, cobalt, waste management.Abstract
Radionuclides may contaminate lubricant oils in nuclear power plants. In Brazil, this kind of waste has been stored in the generator’s facilities, awaiting treatment alternatives. This work intends to investigate a process to treat it for final deposition, using bentonite as sorbent material. This process will result in decontaminated oil, free from radiological control, and radioactive loaded sorbent, with considerable volume reduction of the radioactive waste. The study focuses in cobalt removal from a simulated oil waste (non-active). The production of the simulated waste is described. Bentonite was used for equilibrium time determination, kinetic and adsorption studies. Cobalt adsorption equilibrium was rapidly attained after 30 minutes. The data was used for modelling the system’s kinetic, applying the pseudo first and pseudo second order equation models. Experimental data fitted to pseudo second order model, supporting the assumption that the adsorption is due to chemisorption. Batch sorption tests were conducted and the results fitted to Langmuir and Freundlich sorption models. Both isotherm models chosen for this work did not fit to the experimental data. Thus, these are preliminary results and the studies must be repeated to evaluate data variability and better statistical inference. Other isotherm models must be evaluated to choose the best fitted one and describe the sorption of cobalt on bentonite in oil matrix. Even though, bentonite has considerable potential as sorbent for the removal of cobalt from lubricant oil. Finally, the results might be extended to other kinds of radioactive oils and radioactive organic wastes.Downloads
References
BELANGER, R. L. Method of removing radioactive waste from oil. Patent Number: 4615794, 1986.
OECD/NEA. R&D and Innovation Needs for Decommissioning Nuclear Facilities. p. 318, 2014. Available at: <https://www.oecd-nea.org/rwm/pubs/2014/7191-rd-innovation-needs.pdf>. Last accessed: 06 Sept. 2017.
IAEA, Innovative waste treatment and conditioning technologies at nuclear power plants. IAEA-TECDOC-1504. Viena: 2006.
SOCODEI. Available at: < http://www.socodei.fr/traitement-des-dechets/centraco/lincineration/>. Last ac-cessed: 16 Sept. 2013.
CASSIDY, H. Oil immobilization program at sellafield: an innovative approach. Proceedings of the 11th International Conference on Environmental Remediation and Radioactive Waste Management ICEM2007. Anais...Bruges, Belgium: 2007
POSKAS, P. et al. Progress of radioactive waste management in Lithuania. Progress in Nuclear Energy, v. 54, n. 1, p. 11–21, 2012.
IAEA. Application of Thermal Technologies for Processing of Radioactive Waste. IAEA-TECDOC-1527. December, 2006.
SIMIELE, G. A.; FJELD, R. A.; ROBERTSON, C. Radioactive decontamination of waste oil by filtration, centrifugation, and chelation. Nuclear and chemical waste management, v. 7, n. 2, p. 257–263, 1987.
AUGEM, J.-M.; LAGNIEU, F. Process for the decontamination of an oil. US PATENT 5075044 França, 1991.
BREWER, K. M.; FJELD, R. A. Organic phase binding and removal of Cobalt-60 in turbine lubricating oil. Waste Management, v. 11, p. 19–26, 1991.
KRASZNAI, J. P. ET AL. Waste oil decontaminantion process. Patent number US5516969, 1996.
MARTINS, M. A. G. Regeneração de óleos isolantes usados: solução ou problema? Ciência e Tecnologia dos Materiais, v.9, n. 3/4, p.88-94, 2007.
LUNA, F. M. T. et al. Removal of aromatic compounds from mineral naphthenic oil by adsorption. Industrial and Engineering Chemistry Research, v. 47, n. 9, p. 3207–3212, 2008.
COELHO, A. C. V.; SANTOS, P. S.; SANTOS, H. S. Argilas especiais: argilas quimicamente modificadas - uma revisão. Quim. Nova, v. 30, n. 5, p. 1282–1294, 2007.
HO, Y. S.; MCKAY, G. Pseudo-second order model for sorption processes. Process Biochemistry, v. 34, n. 5, p. 451–465, 1999.
CRINI, G. et al. Removal of C.I. Basic Green 4 (Malachite Green) from aqueous solutions by adsorption using cyclodextrin-based adsorbent: Kinetic and equilibrium studies. Separation and Purification Technology, v. 53, n. 1, p. 97–110, 2007.
MALL, I. D.; SRIVASTAVA, V. C.; AGARWAL, N. K. Adsorptive removal of Auramine-O: Kinetic and equilibrium study. Journal of Hazardous Materials, v. 143, n. 1–2, p. 386–395, 2007.
BASTOS, A. D. C. Adsorção dos Íons Cobre , Cobalto e Níquel na Superfície Organofuncionalizada 3(2-amino-1,3,4-tiadiazol) Sílica Gel, ATDSG. Universidade Estadual Paulista Júlio de Mesquita Filho, São Paulo, 2012.
PETRONI, S. L. G. Avaliação cinética e de equilíbrio do processo de adsorção dos íons dos metais cádmio, cobre e níquel em turfa. [s.l.] Instituto de Pesquisas Energéticas e Nucleares, 2004.
LINGAMDINNE, L. P. et al. Adsorption removal of Co(II) from waste-water using graphene oxide. Hydrometallurgy, v. 165, p. 90–96, 2016.
Y.S., H. Citation Review of Lagergren Kinetic Rate Equation on Adsorption Reactions. Scientometrics, v. 59, n. 1, p. 171–177, 2004.
HO, Y. S. Review of second-order models for adsorption systems. Journal of Hazardous Materials, v. 136, n. 3, p. 681–689, 2006.
DA̧BROWSKI, A. Adsorption - From theory to practice. Advances in Colloid and Interface Science, v. 93, n. 1–3, p. 135–224, 2001.
ROUQUEROL, F.; ROUQUEROL, J.; SING, K. Adsorption by Powders and Porous Solids Principles, Methodology and Applications. p. i–xvi, 1999.
VIJAYAKUMAR, G.; TAMILARASAN, R.; DHARMENDIRAKUMAR, M. Adsorption, kinetic, equilibrium and thermodynamic studies on the removal of basic dye Rhodamine-B from aqueous solution by the use of natural adsorbent perlite. Journal of Materials and Environmental Science, v. 3, n. 1, p. 157–170, 2012.
DURIMEL, A. et al. Role of acidic sites in beta-hexachlorocyclohexane (β-HCH) adsorption by activated carbons: Molecular modelling and adsorption-desorption studies. RSC Advances, v. 5, n. 103, p. 85153–85164, 2015.
BAYRAK, Y. Adsorption Isotherms in Bleaching Hazelnut Oil. v. 80, n. 11, p. 3–6, 2003.
DEVORE, J. L. Probabilidade e estatística para engenharia e ciências. 1. ed. São Paulo: Cengage Learning, 2014.
MANOHAR, D. M.; NOELINE, B. F.; ANIRUDHAN, T. S. Adsorption performance of Al-pillared bentonite clay for the removal of cobalt(II) from aqueous phase. Applied Clay Science, v. 31, n. 3–4, p. 194–206, 2006.
FONTANA, K. B. et al. Biosorption of Pb(II) by urucum shells (Bixa orellana) in aqueous solutions: kinetic, equilibrium and thermodinamic study. Química Nova, v. 39, n. 9, p. 1078–1084, 2016.
WEBER JR, W. J.; DIGIANO, F. A. Process dynamics in environmental systems. New York: John Wiley & Sons, 1995.
Downloads
Published
Issue
Section
License
Copyright (c) 2021 Brazilian Journal of Radiation Sciences
This work is licensed under a Creative Commons Attribution 4.0 International License.
Licensing: The BJRS articles are licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
How to Cite
