Radioactivity released from phosphate-containing fertilizers and from gypsum

Guimond, R.J.; Hardin, J. Michael

doi:10.1016/1359-0197(89)90238-5

Cited by 38 publications

(39 citation statements)

References 10 publications

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“…In the last 20 years, the Brazilian agriculture would not have been possible without the application of large volumes of fertilizers. However, the presence of radionuclides in phosphatic fertilizers (Guimond and Hardin, 1989;Khan et al, 1998;Zielinski, et al, 2000;San Miguel et al, 2003;Becegato et al, 2008) interferes in the environment and the consequences are still unknown. Recent research in Brazil with radioactive elements derived from different fertilizer compositions has triggered the interest of the Brazilian scientific community regarding their environmental implications.…”

Section: Introductionmentioning

confidence: 99%

Concentration of radioactive elements (U, Th and K) derived from phosphatic fertilizers in cultivated soils

Becegato

Ferreira

Machado

2008

Braz. arch. biol. technol.

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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

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Section: Introductionmentioning

confidence: 99%

Concentration of radioactive elements (U, Th and K) derived from phosphatic fertilizers in cultivated soils

Becegato

Ferreira

Machado

2008

Braz. arch. biol. technol.

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“…Low concentrations could also be related to the radionuclide losses and the laminar erosion was not only due to the strong superficial erosion during the soil preparation, but also due to the intense movement of the farming machinery when the sugar cane plantation was installed. Guimond and Hardin (1989) reported that the Mississippi river and its banks received large amounts of the radionuclides coming from the fertilized areas that underwent laminar erosion, once the river cross ten American states that largely consumed phosphate fertilizers. The organic matter can raise the CCC of the soils to 400 cmol c Kg -1 (Santos and Camargo, 1999).…”

Section: Methodsmentioning

confidence: 99%

Gamma-ray spectrometry sensor and geochemical prospecting in an area of sugar cane plantation

Becegato

Ferreira

Cabral

et al. 2008

Braz. arch. biol. technol.

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“…Não se pode imaginar a agricultura brasileira dosúltimos 20 anos, sem aplicações de grandes volumes de adubos. A presença de radionuclídeos em fertilizantes fosfatados (Guimond & Hardin, 1989;Khan et al, 1998;Zielinski et al, 2000;San Miguel et al, 2003) traz interferências no meio ambiente, cujas conseqüências ainda são pouco conhecidas.…”

Section: Introductionunclassified

Gamaespectrometria, resistividade elétrica e susceptibilidade magnética de solos agrícolas no noroeste do estado do Paraná

Becegato¹,

Ferreira²

2005

Rev. Bras. Geof.

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ABSTRACT. Gamma-ray spectrometry, electrical resistivity, and magnetic susceptibility measurements were taken from agricultural areas near the City of Maringá, in the Northwest region of the Paraná state, south Brazil, in order to characterize the spatial distribution of radionuclides (K, eU, and eTh), the apparent resistivity, and the magnetic susceptibility determined for soils. Three different types of soils are present in this agricultural area: Alfisoil, clayey texture Oxisoil, both deriving from Lower Cretaceous basalts of the Serra Geral Formation; and medium texture Oxisoil from reworked Serra Geral and Goio-Erê formations, the latter deriving from sandstones of the Upper Cretaceous Caiuá Group. It could be observed that in more clayey soils both concentration of radionuclides and susceptibility values are higher than in more sandy soils, especially due to the higher adsorption in the former and to the higher availability of magnetic minerals in the latter. The average ppm and Bq Kg −1 grades for K, eU, and eTh in the areas under anthropic activity are of 1766-54.75, 0.83-10.22, and 1.78-7.27, respectively. These grades are significantly higher than those of non-occupied or non-fertilized areas (1101-34.15 K, 0.14-1.69 eU, and 1.31-5.36 eTh in ppm and Bq Kg −1 , respectively.) Correlations were observed between uranium and clay, uranium and magnetic susceptibility, uranium and organic matter, and between electric resistivity and clay grades. Varied concentrations of radionuclides were also observed in different fertilizer formulations applied to soy and wheat cultures. Apparent electric resistivity values between 25 and 647 Ohm.m and magnectic susceptibility values between 0.28 e 1.10 × 10 −3 SI due to clay and magnetic minerals represented important soil discrimination factors in the study area that can be incorporated as easy, low-cost soil mapping tools.Keywords: Gamma-ray spectrometry, electrical resistivity, magnetic susceptibility, agriculture, soils, fertilizers. RESUMO. Medições gamaespectrométricas, de resistividade elétrica e de susceptibilidade magnética foram tomadas em solos agrícolas situados próximos a cidade deMaringá, noroeste do estado do Paraná, sul do Brasil, objetivando caracterizar a distribuição espacial das concentrações de radionuclídeos (K, eU e eTh), da resistividade aparente e da susceptibilidade magnética. Naárea agrícola ocorrem três tipos de solos: Nitossolo Vermelho Eutrófico, Latossolo Vermelho Eutroférrico textura argilosa, ambos derivados da Formação Serra Geral (basaltos do Cretáceo Inferior) e Latossolo Vermelho Distrófico textura média, oriundo do retrabalhamento das formações Serra Geral e Goio-Erê, estaúltima composta por arenitos do Grupo Caiuá (Cretáceo Superior). Constatou-se que as concentrações de radionuclídeos e os valores de susceptibilidade magnética nos solos mais argilosos foram maiores do que nos solos mais arenosos, em função, principalmente, da maior adsorção dos primeiros e da maior disponibilidade de minerais magnéticos. Os teores médios em ppm e Bq...

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Radioactivity released from phosphate-containing fertilizers and from gypsum

Cited by 38 publications

References 10 publications

Concentration of radioactive elements (U, Th and K) derived from phosphatic fertilizers in cultivated soils

Concentration of radioactive elements (U, Th and K) derived from phosphatic fertilizers in cultivated soils

Gamma-ray spectrometry sensor and geochemical prospecting in an area of sugar cane plantation

Gamaespectrometria, resistividade elétrica e susceptibilidade magnética de solos agrícolas no noroeste do estado do Paraná

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