Comparative uptake of plutonium from soils by Brassica juncea and Helianthus annuus

摘要

Plutonium uptake by Brassica juncea (Indian mustard) and Helianthus annuus (sunflower) from soils with varying chemical composition and contaminated with Pu complexes (Pu-nitrate [239~Pu(NO_3)_4], Pu-citrate [239~Pu(C_6H_5O_7)+], and pu-diethylene- triaminepentaacetic acid (Pu-DTPA [239~Pu-C_14H_23O_10N_3]) was investigated. Sequential extraction of soils incubated with applied Pu was used to determine the distribution of Pu in the various soil fractions. The initial Pu activity levels in soils were 44.40-231.25 Bq g~-1 as Pu-nitrate. Pu-citrate, or Pu-DTPA.