| Autor: |
Praus, Lukáš, Száková, Jiřina, Tremlová, Jana |
| Předmět: |
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| Zdroj: |
Archives of Agronomy & Soil Science; Apr2019, Vol. 65 Issue 4, p566-580, 15p |
| Abstrakt: |
Low selenium (Se) dietary intake has encouraged the development of fortification strategies such as SeO42- application to arable land. Selenate is highly mobile in soil systems, but it is not known whether fast abiotic retention could reduce Se loss from topsoil after SeO42- fertilisation. This work explicitly aims at fast abiotic SeO42- sorption in three soils exposed to 20-1250 µg L−1 Se in a 24-h batch experiment. This study demonstrated the susceptibility of Se sorption data to distortion when inductively coupled plasma quadrupole mass spectrometry (ICP-QMS) measurements suffered from non-spectral interferences induced by concomitant elements in an aqueous soil-derived matrix. The distribution coefficient (Kd), not exceeding 2 L kg−1 at any Se level, was shown to be a useful indicator for the extent of ion competition for sorption sites depending on the SeO42- concentration employed. Sorption experiments conducted in the presence or absence of nitrate (10 mM), sulphate (0.52 mM) and phosphate (0.21 mM) allowed three phenomena explaining different SeO42- retention behaviours found even between similar Cambisols to be proposed. Finally, we showed that the co-application of sulphate or phosphate with SeO42- might decrease Se sorption from 150-170 µg kg−1 to a net release from native Se pool. Abbreviations: 1st IP: first ionisation potential; RSD: relative standard deviation [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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