Potential Radiological Impacts of Phosphate Fertilizers Brands used in Southeast, Nigeria
Kenneth K. Agwu, Mark C. Okeji and Paschal Tchokossa
DOI : 10.3844/ajassp.2017.632.635
American Journal of Applied Sciences
Volume 14, Issue 6
The radionuclides present in phosphate fertilizers used in Southeast Nigeria were identified and their activity concentration determined to assess the potential radiological impact on the environment due to fertilizer applications in agricultural farm lands. The radioactivity concentration of 226Ra, 232Th and 40K in the fertilizer samples range from 13.22±1.83 to 87.37±8.98 Bqkg-1 for 226Ra (mean: 31.71±5.4 Bqkg-1), 0.78±0.07 to 47.65±6.05 Bqkg-1 for 232Th (mean: 10.88±3.06) and 575.07±18.08 to 1234.80±36.61 Bqkg-1 for 40K (mean 876.91±20.03 Bqkg-1). The mean activity concentrations of the natural radionuclides of 226Ra and 232Th in the superphosphate fertilizer formulation were found to be above the world’s average. This will have potential health impact on humans if the fertilizers are applied in crops cultivation. The absorbed dose range from 31.01±0.03 to 75.11±0.49 nGyh-1 (mean: 68.66±0.35 nGyh-1). The super phosphate brand of fertilizer with the highest value of activity concentration has its value of annual effective dose as 0.08μ SvGyh-1.
© 2017 Kenneth K. Agwu, Mark C. Okeji and Paschal Tchokossa. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.