THIAGO OLIVEIRA SANTOS

THIAGO OLIVEIRA SANTOS

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Determination of the natural radionuclides 226Ra, 228Ra and 210Pb activity concentrations in the mineral waters from the cities of Monte Alegre do Sul and Socorro, SP
2019 - SANTOS, THIAGO O.; CARMO, AMANDA P.; GONÇALVES, PEDRO N.; DAMATTO, SANDRA R.
The use of mineral water for medical treatment is widespread throughout the world, and several mineral water springs have considerable concentrations of natural radionuclides from the 238U and 232Th series. The estimate of probable adverse effects on human health that may occur because of the ingestion or inhalation of radioactive substances present in these waters is relevant in Radiological Protection. The objective of this study was to determine the activity concentrations of the radionuclides 226Ra, 228Ra and 210Pb in the mineral water springs of Monte Alegre do Sul and Socorro, cities of the Paulista Water Circuit, collected in the seasons of summer, autumn, winter and spring of 2018; these cities have several mineral water springs distributed in many parts of them. The activity concentrations for the mineral waters from Monte Alegre do Sul ranged for 226Ra from limit detection of 2.2 ± 0.2 mBq L-1 to 23.0 ± 0.2 mBq L-1 , from limit detection of 3.7 ± 0.1 mBq L-1 to 16.0 ± 0,8 mBq L-1 for 228Ra and for 210Pb from the limit detection of 4.9 ± 0.4 mBq L-1 to 58 ± 5 mBq L -1 ; for Socorro ranged from limit detection of 2.2 ± 0.2 mBq L-1 to 11.0 ± 0.9 mBq L-1 for 226Ra, from limit detection of 3.7 ± 0.1 mBq L-1 to 48 ± 3 mBq L-1 for 228Ra and for 210Pb from limit detection of 4.9 ± 0.4 mBq L-1 to 49 ± 4 mBq L -1 .
Assessment of Ra-226, Ra-228, Pb-210 and Po-210 activity concentrations and inorganic chemistry composition of the mineral waters of Amparo, SP
2019 - CARMO, AMANDA P.; SANTOS, THIAGO O.; DAMATTO, SANDRA R.; ULRICH, JOÃO C.
Significant concentrations of natural radionuclides dissolved can be found in mineral water springs, mainly radionuclides from the 238U and 232Th decay series that are used worldwide due to its therapeutic properties. The estimation of possible adverse effects on human health due to the ingestion or inhalation of radioactive substances present in these waters is a relevant factor in the context of Radiological Protection. The objective of this work was to evaluate the activity concentrations of the radionuclides 226Ra, 228Ra, 210Pb and 210Po in the mineral water springs of the city of Amparo in the seasons of summer, autumn, winter and spring of 2018 and the committed effective doses due to the consumption of these waters, and as well as, characterize its chemical composition. The city of Amparo has 11 springs distributed in many places of the city and belongs to the Paulista Water Circuit. The highest activity concentrations were obtained for the radionuclides 228Ra and 210Po and consequently the highest committed effective dose. Among the chemical elements analyzed, Al, Mn, and Pb presented the highest concentrations in all the mineral water springs.
Assessment of trace elements concentration in Nicotiana tabacum L., Virginia variety
2017 - SANTOS, T.O.; SILVA, C.F.; DAMATTO, S.R.
Tobacco plant Nicotiana tabacum L. is used in the manufacture of all derivate products and the chemistry composition resulting of smoking varies with the kind of tobacco leaves, how they are grown, their original region, the features of preparation and the temperature variations resulting from the incomplete combustion of tobacco. There is a lack of information about the radiological and chemistry characterization of the tobacco plant in international and mainly Brazilian literature. The objective of this study was to determine the concentration of the elements As, Ba, Br, Ca, Ce, Co, Cr, Cs, Eu, Fe, Hf, K, La, Lu, Na, Nd, Rb, Sb, Sc, Se, Sm, Ta, Tb, Th, U, Yb and Zn in the Nicotiana tabacum L., Virginia variety, by the Instrumental Neutron Activation Analysis (INAA) technique. The INAA was used in the Virginia variety cultivated at IPEN and the same variety cultivated in the city of Arvorezinha, Rio Grande do Sul by a regular producer. The samples cultivated in Arvorezinha were separated in soil, root, stem and leaves and the samples cultivated at IPEN were separated in substrate, root, stem and leaves. The results of rare earth elements showed a similar behavior among the plants, with higher results in soil and substrate and in the leaves. It was observed that the plants of the producers presented higher concentration of the studied elements when compared to the plants cultivated in IPEN. These higher concentrations are probably due to the addition of fertilizers to the producer’s crop and also because these elements can accumulate in the soil due to many years of use, different from the substrate used in the IPEN cultivation.
Avaliação da concentração de elementos traço na Nicotiana tabacum L., variedade Virgínia
2016 - SANTOS, THIAGO O.; DAMATTO, SANDRA R.
Variação sazonal da concentração sup(210)Pb medido em amostras de solo da cidade de São Paulo
2015 - FREITAS, GUSTAVO R. de; SANTOS, THIAGO O.; DAMATTO, SANDRA R.
Heavy metal accumulation in blue crabs (callinectes bocourti) from Maceio, Alagoas
2007 - FIGUEIREDO, ANA M.G.; SANTOS, THIAGO O. dos; SILVA FILHO, CRESCENCIO A.; GENEZINI, FREDERICO A.; FURIA, ROSARIA
Chemical element composition of atmospheric bromeliads for active biomonitoring of the sugarcane cultivation impacts
2011 - SANTOS, THIAGO O.; SILVA FILHO, CRESCENCIO A.; SAIKI, MITIKO; GENEZINI, FREDERICO A.; FRANÇA, ELVIS J.; HAZIN, CLOVIS A.; VALENTIM, ELAINE