Application of the coconut fiber in radioactive liquid waste treatment
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2018
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International Journal of Environmental Science and Technology
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The treatment of radioactive liquid waste containing
organic compounds was always a cause for concern
to radioactive waste management facilities because the
processes available are expensive and difficult to manage.
Biosorption has been studied as a new process in simulated
wastes as an alternative to treating them. Among the
potential biomass, the coconut fiber has very attractive
features that allow the removal of radionuclides using a
low-cost biosorbent. The aim of this study was to evaluate
the capacity of coconut fiber to remove uranium, americium,
and cesium from real radioactive liquid organic
waste. Experiments with the biosorption of these radionuclides
in coconut fiber were made including (1) preparation,
activation, and characterization of biomass and (2)
biosorption assays. The biomass was tested in raw and
activated form. Biosorption assays were performed, adding
the biomass to real waste solutions. The solutions contain
natural uranium, americium-241, and cesium-137. The
contact times and the concentrations range were varied.
The radioisotopes remaining concentration in the solutions
was determined by inductively coupled plasma optical
emission spectrometry and gamma spectrometry. The
results were evaluated by maximum experimental sorption
capacity and isotherm and kinetics ternary models. The
highest sorption capacity was observed with the activated
coconut fiber, with values of 2 mg/g of U (total),
70E-06 mg/g of Am-241 and 40E-09 mg/g of Cs-137.
These results suggest that biosorption with activated
coconut fiber can be applied in the treatment of radioactive
liquid organic wastes containing uranium, americium-241,
and cesium-137.
Como referenciar
FERREIRA, R.V.P.; SILVA, E.A.; CANEVESI, R.L.S.; FERREIRA, E.G.A.; TADDEI, M.H.T.; PALMIERI, M.C.; SILVA, F.R.O.; MARUMO, J.T. Application of the coconut fiber in radioactive liquid waste treatment. International Journal of Environmental Science and Technology, v. 15, n. 8, p. 1629-1640, 2018. DOI: 10.1007/s13762-017-1541-6. Disponível em: http://repositorio.ipen.br/handle/123456789/28488. Acesso em: 26 Apr 2024.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.