Study of phosphate species of chernozem and sand soils by heterogeneous isotope exchange with 32P radioactive tracer

Noémi M Nagy; Dóra Buzetzky; Eszter Mária Kovács; Andrea Balla Kovács; János Kátai; Imre Vágó; Kónya József

doi:10.1016/j.apradiso.2019.06.038

Study of phosphate species of chernozem and sand soils by heterogeneous isotope exchange with ³²P radioactive tracer

Appl Radiat Isot. 2019 Oct:152:64-71. doi: 10.1016/j.apradiso.2019.06.038. Epub 2019 Jun 27.

Authors

Noémi M Nagy¹, Dóra Buzetzky², Eszter Mária Kovács², Andrea Balla Kovács³, János Kátai³, Imre Vágó³, Kónya József²

Affiliations

¹ Imre Lajos Isotope Laboratory, Department of Physical Chemistry, University of Debrecen, Debrecen, Egyetem tér 1, H-4032, Hungary. Electronic address: nagy.noemi@science.unideb.hu.
² Imre Lajos Isotope Laboratory, Department of Physical Chemistry, University of Debrecen, Debrecen, Egyetem tér 1, H-4032, Hungary.
³ Institute of Agricultural Chemistry and Soil Science, University of Debrecen, Debrecen, Böszörményi út 138, H-4032, Hungary.

PMID: 31280109
DOI: 10.1016/j.apradiso.2019.06.038

Abstract

Weakly and tightly sorbed phosphate species on chernozem and humus sand are investigated by radioactive tracer method using ³²P. The comparison of the heterogeneous isotope exchange of ³²P-labeled phosphate of non-radioactively incubated soils and desorption of ³²P-labeled phosphate of radioactively incubated soils shows the transformation of weakly sorbed species to tightly sorbed ones. The quantity of weakly sorbed phosphorus and the steady state phosphorus exchange rate between soil and soil solution, transformation half-life of weakly to tightly sorbed phosphate are calculated.

Keywords: (32)P tracer; Calcareous chernozem; Heterogeneous isotope exchange; Humus sand (calcareous); Incubation; Phosphate species.