Journal
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
Volume 301, Issue 1, Pages 237-245Publisher
SPRINGER
DOI: 10.1007/s10967-014-3110-5
Keywords
Biosorption behavior; Biosorption mechanisms; Thorium; PIXE
Funding
- China National Natural Science Foundation [21071102, 91126013, U1330125]
- China Academy of Engineering Physics (NSAF) [U1330125]
- National Fund of China for Fostering Talents in Basic Science [J1210004]
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To understand the impact of microorganisms on the fate of thorium in soils, we have investigated the thorium biosorption behavior and mechanism on the living and dead cells of Streptomyces sporoverrucosus dwc-3, isolated from soils in China. The living cells need more time (24 h) to reach equilibrium than dead cells (24 h). The biosorption is greatly dependent on pH and ionic strength for the two kinds of cells. SEM and TEM indicate that thorium initially bind with the cell surface which is probably controlled by ion-exchange, evidence by PIXE, and inner-sphere complexation mechanism and then accumulated in the cytoplasm.
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