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Updated: Jun 27, 2026

Measuring Fluxes of Mineral Nutrients and Toxicants in Plants with Radioactive Tracers

Measuring Fluxes of Mineral Nutrients and Toxicants in Plants with Radioactive Tracers

Published on: August 22, 2014

Radium and uranium levels in vegetables grown using different farming management systems.

D C Lauria¹, F C A Ribeiro, C C Conti

¹Instituto de Radioproteção e Dosimetria (IRD/CNEN), Av. Salvador Allende s/n, Recreio dos Bandeirantes, Rio de Janeiro, RJ, CEP 22780-160, Brazil. dejanira@ird.gov.br

Journal of Environmental Radioactivity

|December 17, 2008

Summary

Hydroponic farming significantly reduces radionuclide uptake in vegetables like lettuce. Organic and conventional farming methods showed no difference in uranium and radium concentrations in crops.

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Last Updated: Jun 27, 2026

Measuring Fluxes of Mineral Nutrients and Toxicants in Plants with Radioactive Tracers

Measuring Fluxes of Mineral Nutrients and Toxicants in Plants with Radioactive Tracers

Published on: August 22, 2014

Area of Science:

Environmental Science
Agricultural Science
Radiochemistry

Background:

Understanding radionuclide (uranium and radium) accumulation in food crops is crucial for food safety and human health.
Different agricultural management practices, including conventional, organic, and hydroponic systems, may influence radionuclide uptake by plants.

Purpose of the Study:

To compare the concentrations of uranium (238U) and radium (226Ra, 228Ra) in vegetables grown under conventional, organic, and hydroponic farming systems.
To investigate the relationships between soil properties and radionuclide uptake in plants.

Main Methods:

Analysis of (238)U, (226)Ra, and (228)Ra concentrations in lettuce, carrots, and beans cultivated using phosphate fertilizer (conventional), bovine manure (organic), and mineral nutrient solution (hydroponic).
Assessment of soil properties, including exchangeable Ca, Mg, and cation exchange capacity (CEC).
Calculation of soil-to-plant transfer factors for uranium and radium.

Main Results:

Lettuce grown hydroponically exhibited the lowest concentrations of (226)Ra, (228)Ra, and (238)U.
No significant differences in uranium and radium concentrations were observed between conventionally and organically grown vegetables.
Plant uranium content correlated with soil exchangeable Ca and Mg, while radium concentrations were inversely correlated with soil CEC. Liming may increase U and decrease Ra uptake.

Conclusions:

Hydroponic systems demonstrate potential for minimizing radionuclide accumulation in vegetables.
Soil properties, particularly cation exchange capacity and the availability of calcium and magnesium, play a role in regulating uranium and radium uptake.
Agricultural management practices can influence the radionuclide content of edible crops, with implications for food safety assessments.