FONSECA, LEANDRO M. daPECEQUILO, BRIGITTE R.S.2017-03-062017-03-06FONSECA, LEANDRO M. da; PECEQUILO, BRIGITTE R.S. 226Ra, 232Th and 40K concentrations in Brazilian wall paints. In: NATURALLY OCCURRING RADIOACTIVE MATERIAL, 8th, October 18-21, 2016, Rio de Janeiro, RJ. <b>Proceedings...</b> Disponível em: http://repositorio.ipen.br/handle/123456789/27110.http://repositorio.ipen.br/handle/123456789/27110Geological materials used as building materials act as a source of radiation due to primordial radionuclides as the single radioactive isotope of potassium 40K and radioisotopes from the uranium 238U and 232Th series. Wall paints are one of the building materials to be considered for dose rates evaluation, as, beside other components, contain pigments, mainly titanium dioxide. As titanium dioxide is obtained from minerals as rutile and ilmenite, with thorium and uranium traces, the activity concentration of natural radionuclides in wall paints should be determined, for further annual effective dose assessment in a construction. In this work, activity concentrations of 226Ra, 232Th and 40K were determined by high-resolution gamma-ray spectrometry in 50 commercial brazilian white latex wall paints samples. The activity concentration values for 226Ra ranged from 1.41 Bq.kg-1 to 38.7 Bq.kg-1, for 232Th from 0.9 Bq.kg-1 to 101.2 Bq.kg-1 and for 40K from 5.9 Bq.kg-1 to 256 Bq.kg-1. The results show that the activity concentrations of the wall paints studied in this work are in a safe range for use for all the 50 samples.openAccessResumo de eventos científicoshttps://orcid.org/0000-0001-5641-1165