Concentration of radioactive elements (U, Th and K) derived from phosphatic fertilizers in cultivated soils
Gamma spectrometric measurements were obtained for the agricultural soils aiming at characterizing the spatial distribution of radionuclide concentrations (K, eU and eTh), as well for the samples of phosphatic fertilizers and agricultural gypsum. In the study areas, three types of soils occured: Eut...
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Instituto de Tecnologia do Paraná (Tecpar)
2008-12-01
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| Series: | Brazilian Archives of Biology and Technology |
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| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132008000600022 |
| _version_ | 1811264771944611840 |
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| author | Valter Antonio Becegato Francisco José Fonseca Ferreira William César Pollonio Machado |
| author_facet | Valter Antonio Becegato Francisco José Fonseca Ferreira William César Pollonio Machado |
| author_sort | Valter Antonio Becegato |
| collection | DOAJ |
| description | Gamma spectrometric measurements were obtained for the agricultural soils aiming at characterizing the spatial distribution of radionuclide concentrations (K, eU and eTh), as well for the samples of phosphatic fertilizers and agricultural gypsum. In the study areas, three types of soils occured: Eutrophic Red Nitosol (Alfisoil), Eutroferric Red Latosol of clayey texture (Oxisoil) and Dystrophic Red Latosol of medium texture (Oxisoil). The results showed that the radionuclide concentrations in more clayey soils were higher than in more sandy soils, mainly as a function of a higher adsorption capacity of the former. For the area where human activity predominated, the average contents of K, eU and eTh were respectively 54.75; 10.22 and 7.27 Bq/Kg, significantly higher than those for the area where no fertilizers were used (34.15 Bq/Kg K; 1.69 Bq/Kg eU, and 5.36 Bq/Kg eTh). Variations in the radionuclide concentrations were also observed in various fertilizer formula used in soybean and wheat crops.<br>Medições gamaespectrométricas foram obtidas em solos agrícolas objetivando caracterizar a distribuição espacial das concentrações de radionuclídeos (K, eU e eTh), bem como em amostras de fertilizantes fosfatados e gesso agrícola. Na área ocorrem três tipos de solos: Nitossolo Vermelho Eutrófico, Latossolo Vermelho Eutroférrico textura argilosa e Latossolo Vermelho Distrófico textura média. Constatou-se que as concentrações de radionuclídeos nos solos mais argilosos foram maiores do que nos solos mais arenosos, em função, principalmente, da maior adsorção pelos primeiros. Os teores médios em Bq/Kg de K, eU e eTh na área com atividade antrópica foram respectivamente de 54,75; 10,22 e 7,27, significativamente maiores do que em áreas virgens sem aplicação de fertilizantes (34,15 de K; 1,69 de eU e 5,36 de eTh). Foram também observadas variações nas concentrações de radionuclídeos em diferentes formulações de adubos utilizados nas culturas de soja e trigo. |
| first_indexed | 2024-04-12T20:10:20Z |
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| issn | 1516-8913 1678-4324 |
| language | English |
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| publishDate | 2008-12-01 |
| publisher | Instituto de Tecnologia do Paraná (Tecpar) |
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| series | Brazilian Archives of Biology and Technology |
| spelling | doaj.art-865dfde70bd343daa04653f85191a3e62022-12-22T03:18:15ZengInstituto de Tecnologia do Paraná (Tecpar)Brazilian Archives of Biology and Technology1516-89131678-43242008-12-015161255126610.1590/S1516-89132008000600022Concentration of radioactive elements (U, Th and K) derived from phosphatic fertilizers in cultivated soilsValter Antonio BecegatoFrancisco José Fonseca FerreiraWilliam César Pollonio MachadoGamma spectrometric measurements were obtained for the agricultural soils aiming at characterizing the spatial distribution of radionuclide concentrations (K, eU and eTh), as well for the samples of phosphatic fertilizers and agricultural gypsum. In the study areas, three types of soils occured: Eutrophic Red Nitosol (Alfisoil), Eutroferric Red Latosol of clayey texture (Oxisoil) and Dystrophic Red Latosol of medium texture (Oxisoil). The results showed that the radionuclide concentrations in more clayey soils were higher than in more sandy soils, mainly as a function of a higher adsorption capacity of the former. For the area where human activity predominated, the average contents of K, eU and eTh were respectively 54.75; 10.22 and 7.27 Bq/Kg, significantly higher than those for the area where no fertilizers were used (34.15 Bq/Kg K; 1.69 Bq/Kg eU, and 5.36 Bq/Kg eTh). Variations in the radionuclide concentrations were also observed in various fertilizer formula used in soybean and wheat crops.<br>Medições gamaespectrométricas foram obtidas em solos agrícolas objetivando caracterizar a distribuição espacial das concentrações de radionuclídeos (K, eU e eTh), bem como em amostras de fertilizantes fosfatados e gesso agrícola. Na área ocorrem três tipos de solos: Nitossolo Vermelho Eutrófico, Latossolo Vermelho Eutroférrico textura argilosa e Latossolo Vermelho Distrófico textura média. Constatou-se que as concentrações de radionuclídeos nos solos mais argilosos foram maiores do que nos solos mais arenosos, em função, principalmente, da maior adsorção pelos primeiros. Os teores médios em Bq/Kg de K, eU e eTh na área com atividade antrópica foram respectivamente de 54,75; 10,22 e 7,27, significativamente maiores do que em áreas virgens sem aplicação de fertilizantes (34,15 de K; 1,69 de eU e 5,36 de eTh). Foram também observadas variações nas concentrações de radionuclídeos em diferentes formulações de adubos utilizados nas culturas de soja e trigo.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132008000600022Gamma-rays spectrometrysoilsfertilizers |
| spellingShingle | Valter Antonio Becegato Francisco José Fonseca Ferreira William César Pollonio Machado Concentration of radioactive elements (U, Th and K) derived from phosphatic fertilizers in cultivated soils Brazilian Archives of Biology and Technology Gamma-rays spectrometry soils fertilizers |
| title | Concentration of radioactive elements (U, Th and K) derived from phosphatic fertilizers in cultivated soils |
| title_full | Concentration of radioactive elements (U, Th and K) derived from phosphatic fertilizers in cultivated soils |
| title_fullStr | Concentration of radioactive elements (U, Th and K) derived from phosphatic fertilizers in cultivated soils |
| title_full_unstemmed | Concentration of radioactive elements (U, Th and K) derived from phosphatic fertilizers in cultivated soils |
| title_short | Concentration of radioactive elements (U, Th and K) derived from phosphatic fertilizers in cultivated soils |
| title_sort | concentration of radioactive elements u th and k derived from phosphatic fertilizers in cultivated soils |
| topic | Gamma-rays spectrometry soils fertilizers |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132008000600022 |
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