PAULO FLAVIO DE MACEDO GOUVEA
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Artigo IPEN-doc 26228 Radiological characterization of peloids maturated with Águas de Lindóia, Poços de Caldas and Peruíbe waters2019 - TORRECILHA, JEFFERSON K.; MARRICHI, JUSSARA M.O.; SOUZA, EDUARDO A.P.; GOUVEA, PAULO F. de M.; SILVA, PAULO S.C..One of the concerns about using mineral clay for therapy treatments is its radioactivity content due to natural radionuclides, normally, associated with the clays. This work proposes to characterize the natural radionuclides of the peloids obtained by the maturation process of mixing bentonite and montmorillonite with different mineral medicinal waters from Águas de Lindóia (SP), Peruíbe (SP) and Poços de Caldas (MG). For this procedure, gray end green bentonite samples were left in contact with running water for three, six and nine months, after this, they were collected, dried, transferred to a mortar, crushed and placed in approximately 40 cm3 polyethylene flasks, sealed and set apart for about four weeks, prior to the measurements. The concentration of 210Pb was determined by measuring the activity of its low energy peak (47 keV). Comparing the gray and green bentonite peloids, all the activity concentration of radionuclides are higher in gray ones, except 40K. The activity concentration varied from 84 to 156 Bq kg−1 (228Ra), 25 to 156 Bq kg−1 (228Th), 9 to 161 Bq kg−1 (226Ra), 39 to 256 Bq kg−1 (210Pb) and 162 to 1070 Bq kg−1 (40K).Artigo IPEN-doc 26167 Determination of mineral elements and traces present in the fractions of the humic substances of Peruíbe Black Mud2019 - SOUFIA, LAYLA B.; GOUVEA, PAULO F. de M.; SILVA, PAULO S.C. daPeruíbe Black Mud (PBM) found in the city of Peruíbe in state of São Paulo, is known for its curative and anti-inflammatory properties. Considered as a material with high cation exchange capacity, microbiological analyzes revealed a large amount of sulfate reducing bacteria and high content of organic material from the biological-metabolic process. In order to provide data that may be useful to understand its therapeutic effects and secondly to certify its quality for use in medical treatments it is necessary to determine the presence of trace elements and minerals present in the different fractions of humic substances and, for this, the technique of neutron activation analysis (INAA) associated with gamma spectrometry was used. Results demonstrate that elements such as Cr and Zn may be concentrated in the humic fraction over the mineral fraction of the mud.Artigo IPEN-doc 21214 Chemical and radiological characterization of Peruibe black mud2015 - SILVA, PAULO S.C. da; TORRECILHA, JEFFERSON K.; GOUVEA, PAULO F. de M.; MADUAR, MARCELO F.; OLIVEIRA, SONIA M.B. de; SCAPIN, MARCOS A.