Binding of Pu(IV) to galacturonic acid and extracellular polymeric substances (EPS) from Shewanella putrefaciens, Clostridium sp and Pseudomonas fluorescens


Harper R. M. , Kantar C. , Honeyman B. D.

RADIOCHIMICA ACTA, cilt.96, ss.753-762, 2008 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 96
  • Basım Tarihi: 2008
  • Doi Numarası: 10.1524/ract.2008.1562
  • Dergi Adı: RADIOCHIMICA ACTA
  • Sayfa Sayıları: ss.753-762

Özet

The conditional stability constants for trace-level concentrations of Pu(IV) complexing with galacturonic acid and EPS, isolated from axenic Clostridium sp., P. fluorescens and Shewanella putrefaciens CN32 cultures, were determined at pH 4 and an ionic strength of 0.1 M NaCl using ail ion-exchange technique. The analysis of ion-exchange data with Schubert's technique indicates that the Pu binding by galacturonic acid and EPS from Clostridium sp. and S. putrefaciens can be described based on the formation of 1 : 1 Pu(IV)-ligand complexes. However, the accurate description of Pu binding by EPS from P. fluorescens requires postulation of a mixture of 1 : 1/1 : 2 complexes between Pu(IV) and ligands under the experimental conditions studied.