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

Becegato, Valter Antônio; Ferreira, Francisco José Fonseca; Cabral, João Batista Pereira; Neto, Sílvio Luís Rafaelli

doi:10.1590/s1516-89132008000100001

Cited by 10 publications

(6 citation statements)

References 21 publications

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“…, 2010). One exception to this finding can be seen in fertilizers from Brazil, which have reported radioactivity levels of 232 Th that are equal to or even greater than those of 238 U (Becegato et al. , 2008a).…”

Section: Introductionmentioning

confidence: 94%

Changes in uranium and thorium contents in topsoil after long‐term phosphorus fertilizer application

Wetterlind

Richer-de-Forges

Nicoullaud

et al. 2011

Soil Use and Management

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Archived soil samples from the beginning and end of three long‐term field trials conducted in central France were analysed for total uranium (U) and thorium (Th) contents to evaluate the effect of 15–30 yr of phosphorus (P) fertilizer treatments on the accumulation of these elements in the topsoil. For comparison, the soil samples were also analysed for total P. Three treatments were compared: no P application (P0), 26 kg P/ha/yr (P26) and 52 kg P/ha/yr (P52). Significant effects of P fertilizer were observed on U content and, to a lesser extent, on Th content as a result of the P52 treatment at two of the field trials. This effect was demonstrated both in the analyses at the end of the field trials [P52–P0: +0.25 and +0.44 mg U/kg soil, +0.58 (not significant) and +1.03 mg Th/kg soil] and when considering the changes in U and Th contents between the beginning and the end of the field trials (end–start: +0.18 and +034 mg U/kg soil, +0.35 and +0.45 mg Th/kg soil). The P fertilizer effect was also supported by the correlations of U and Th with total levels of P in the soil. However, in one of the three trials, no significant accumulation of U or Th because of fertilizer could be seen, suggesting either that less U and Th were applied using a different P fertilizer and/or that soil heterogeneity masked significant effects.

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Section: Introductionmentioning

confidence: 94%

Changes in uranium and thorium contents in topsoil after long‐term phosphorus fertilizer application

Wetterlind

Richer-de-Forges

Nicoullaud

et al. 2011

Soil Use and Management

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“…From this point on, it is necessary to better understand the hydrographic basins, considering their present use, as well as their maximum use capacity, under the point of view of all existing activities in their contribution areas, aiming at a water quality control that can be applied to similar basins. Another factor is the identification of environmental variables that really represent the situation of real use and by doing so propose a control model built with the most significant environmental variables (Marques et al, 2003;Becegato et al, 2008). The present work aimed at monitoring the water quality of the Conrado River.…”

Section: Introductionmentioning

confidence: 99%

Anthropic influence in the water quality of the river basin that supplies the Pato Branco Municipality-PR

Machado

Becegato

Bittencourt

2009

Braz. arch. biol. technol.

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“…The activity concentrations depend on the origin of the fertilizer components, and widely vary from one country to another. The presence of natural radionuclides in fertilizers derived from phosphate ore have been investigated by many authors during the past decades [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16]. The reported activity concentration of 238 U in phosphate is 5-50 times higher than normal soil [2,17].…”

Section: Introductionmentioning

confidence: 99%

Natural radioactivity measurements in agricultural soil, fertilizer and crops in some specific areas of Kingdom of Saudi Arabia

Latif¹,

Kinsara²,

Molla³

et al. 2014

Radiochimica Acta

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High Purity Germanium (HPGe) detector gamma-ray spectrometry with 500 cc Marinelli beaker geometry was used for radioactivity measurement in some specific areas of Kingdom of Saudi Arabia (KSA).The detection limits of 210 Pb, 238 U, 226 Ra, 232 Th and 40 K in soil, fertilizers, and vegetables lie mostly below 1 Bq/kg. The activity concentrations of 238 U and 226 Ra in local phosphate fertilizers were measured in the range of 236.8-879.0 Bq/kg and 101.5-297.0 Bq/kg, respectively. The respective activity concentrations of 238 U and 226 Ra measured in one charge of German phosphate fertilizer are in the range of 552.7-790.0 Bq/kg and 280.6-317.0 Bq/kg. The activity concentrations of 232 Th are assessed to have maximum values up to 2.24 Bq/kg in locally manufactured phosphate fertilizers. Local urea exhibited concentration level (Bq/kg) of 210 Pb, 238 U, 226 Ra, 232 Th and 40 K below the detection limit. Mean values of activity concentrations of 238 U in agricultural soil of Wadi Fatima, Taif, Hada Al-Sham, Madina Cityand Abyar Al-MashiMadina are 21.7 ± 3.24, 38.2 ± 4.1, 17.6 ± 2.1, 34.3 ± 3.5 and 32.7 ± 2.4 Bq/kg, respectively. The respective mean of 226 Ra activity concentrations in those areas are 12.16 ± 1.16, 20.2 ± 1.33, 11.21 ± 0.4, 21.4 ± 1.7 and 21.0 ± 1.22 Bq/kg. The specific activity of 232 Th in the respective areas has been measured as 12.6 ± 1.3, 25.3 ± 0.8, 11.5 ± 0.9, 20.4 ± 2.4 and 20.0 ± 1.2 Bq/kg. Activity concentrations of 210 Pb, 238 U, 226 Ra and 232 Th in the vegetable samples are mostly found in the range of 0.37 Bq/kg to 37.8 Bq/kg. The 40 K specific activity lies in the range of 44.4-196 Bq/kg.The calculated absorbed dose rates in the representative locations are 24.07-53.28 nGy/h.

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

Abstract: In this study the K, U and Th radionuclide concentrations were determined in a sugar 71 and 0.68 %; 16.2 and 16.9 %, and 29.0 and 26.8 mg/l respectively.

Cited by 10 publications

References 21 publications

Changes in uranium and thorium contents in topsoil after long‐term phosphorus fertilizer application

Changes in uranium and thorium contents in topsoil after long‐term phosphorus fertilizer application

Anthropic influence in the water quality of the river basin that supplies the Pato Branco Municipality-PR

Natural radioactivity measurements in agricultural soil, fertilizer and crops in some specific areas of Kingdom of Saudi Arabia

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