Evaluation of radionuclide contamination of soil, coal ash and zeolitic materials from figueira thermoelectric power plant
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2017
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INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE
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Neutron activation analysis and gamma-ray spectrometry was used to determine 238U, 226Ra, 228Ra, 210Pb,
232Th and 40K contents in feed pulverized coal, bottom ash, fly ash from cyclone and baghouse filters, zeolites
synthesized from the ashes and two different soil samples. All the samples used in the study was collected at
Figueira thermoelectric power plant, located in the city of Figueira, Paraná State, which coal presents a
significant amount of uranium concentration. The natural radionuclide concentrations in pulverized coal were
4216 Bq kg–1 for 238U, 180 Bq kg–1 for 226Ra, 27 Bq kg–1 for 228Ra, 28 Bq kg–1 for 232Th and 192 Bq kg–1 for 40K.
The ashes fraction presented concentrations ranging from 683.5 to 1479 Bq kg–1 for 238U, from 484 to
1086 Bq kg–1 for 226Ra, from 291 to 1891 Bq kg–1 for 210Pb, from 67 to 111 Bq kg–1for 228Ra, from 80 to
87 Bq kg–1 for 232Th and from 489 to 718 Bq kg–1 for 40K. Similar ranges were observed for zeolites. The
activity concentration of 238U was higher than worldwide average concentration for all samples. The
concentration of the uranium series found in the ashes were lower than the values observed in similar studies
carried out 10 years ago and under the limit adopted by the Brazilian guideline (CNEN-NN-4.01). Nevertheless,
the concentrations of this specific area are higher than others coal mines and thermoelectric power plants in and
out of Brazil, so it is advisable to evaluate the environmental impact of the installation.
Como referenciar
FUNGARO, DENISE A.; SILVA, PAULO S.C. da; CAMPELLO, FELIPE A.; MIRANDA, CAIO da S.; IZIDORO, JULIANA de C. Evaluation of radionuclide contamination of soil, coal ash and zeolitic materials from figueira thermoelectric power plant. In: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE, October 22-27, 2017, Belo Horizonte, MG. Proceedings... Rio de Janeiro, RJ: Associação Brasileira de Energia Nuclear, 2017. Disponível em: http://repositorio.ipen.br/handle/123456789/28268. Acesso em: 30 Dec 2025.
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.