Radiological impact of phosphogypsum surface application in a no-till system in Southern Brazil

Pesquisa Agropecuária Brasileira

Nivea Maria Piccolomini Dias¹  Eduardo Fávero Caires²  Luiz Fernando Pires¹  Márcio Arruda Bacchi²  Elisabete Aparecida De Nadai Fernandes² 

[1],Universidade Estadual de Ponta Grossa Laboratório de Física Aplicada a Solos e Ciências Ambientais Ponta Grossa PR ,Brazil

关键词: Glycine max;    gamma spectrometry;    radioactivity;    226Ra;    228Ra;    Glycine max;    espectrometria gama;    radioatividade;    226Ra;    228Ra;   

DOI  :  10.1590/S0100-204X2010001200017

来源: SciELO

【 摘 要 】

The objective of this work was to determine the impact of phosphogypsum application on 226Ra and 228Ra activities in the soil and on their accumulation in soybean grains. A field experiment was carried out in Paraná state, Brazil, on a loamy Typic Hapludox, under no-till system, with increasing phosphogypsum rates: 4, 8, and 12 Mg ha-1. GammA ray spectrometry was carried out using HPGe detectors with 45 and 10% relative efficiencies, for soybean grains and soil, respectively. No increment of 226Ra and 228Ra activities was observed due to the increase in phosphogypsum rates in the soil, and a small reduction was noticed in the grains. Average values found for 226Ra and 228Ra activities were 37 and 57 Bq kg-1 in the soil and 1.44 and 3.19 Bq kg-1 in soybean grains. The application of phosphogypsum for no-till soybean production is a safe practice regarding the risks of radiation damage to human health

【 授权许可】

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