Future food contaminants: An assessment of the plant uptake of Technology-critical elements versus traditional metal contaminants
EntityUAM. Departamento de Química Agrícola
10.1016/j.envint.2022.107504Environment International 169 (2022): 107504
Funded byThis study was financially supported by the Swedish research council (grant no. 2021–04592), the faculty of health and life sciences at the Linnaeus University, ALS Scandinavia AB, the Ministry of Education, Youth and Sports of the Czech Republic (project no. CZ.02.1.01/0.0/ 0.0/16_026/0008403) and the Scottish Government Strategic Research Program (2022-2027) under project JHI-D3-1, Healthy Soils for a Green Recovery. We would also like to thank all the gardeners that have provided us with cultivation soils for the study, Thomas Nehls who helped with the arrangements for collecting the Berlin soil, and the volunteers at The Wonky Garden, Widnes, for their help to source and sample soils for this study
SubjectsArsenic; Cadmium; Gallium; Lanthanide; Niobium; Nitric Acid; Química
Rights© 2022 The Author(s)
Esta obra está bajo una Licencia Creative Commons Atribución 4.0 Internacional.
Technology-critical elements (TCEs) include most rare earth elements (REEs), the platinum group elements (PGEs), and Ga, Ge, In, Nb, Ta, Te, and Tl. Despite increasing recognition of their prolific release into the environment, their soil to plant transfer remains largely unknown. This paper provides an approximation of the potential for plant uptake by calculating bioconcentration factors (BCFs), defined as the concentration in edible vegetable tissues relative to that in cultivation soil. Here data were obtained from an indoor cultivation experiment growing lettuce, chard, and carrot on 22 different European urban soils. Values of BCFs were determined from concentrations of TCEs in vegetable samples after digestion with concentrated HNO3, and from concentrations in soil determined after 1) Aqua Regia digestion and, 2) diluted (0.1 M) HNO3 leaching. For comparison, BCFs were also determined for 5 traditional metal contaminants (TMCs; As, Cd, Cu, Pb, and Zn). The main conclusions of the study were that: 1) BCF values for the REEs were consistently low in the studied vegetables; 2) the BCFs for Ga and Nb were low as well; 3) the BCFs for Tl were high relative to the other measured TCEs and the traditional metal contaminants; and 4) mean BCF values for the investigated TCEs were generally highest in chard and lowest in carrot. These findings provide initial evidence that there are likely to be real and present soil–plant transfer of TCEs, especially in the case of Tl. Improvements in analytical methods and detection limits will allow this to be further investigated in a wider variety of edible plants so that a risk profile may be developed
Google Scholar:Qvarforth, A. - Lundgren, M. - Rodushkin, I. - Engstrom, E. - Paulukat, C. - Hough, R. L. - Moreno Jiménez, Eduardo - Beesley, L. - Trakal, L. - Augustsson, A.
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