Uptake and elemental distribution of radiosilver 108mAg and radiocesium 137Cs in shiitake mushrooms (Lentinula edodes)

Weller, Anica; Zok, Dorian; Steinhäuser, Georg

doi:10.1007/s10967-019-06778-1

Cited by 8 publications

(1 citation statement)

References 46 publications

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“…As an example of an organic food matrix, mushrooms were chosen. They are known to highly accumulate both 134,137 Cs , and Ag. ,, Shiitake mushrooms (Lenitula edodes) were grown on wood shavings incubated with Shiitake mycelium. The substrate (500 g) was homogeneously contaminated with 900 Bq 108m Ag and 100 kBq 137 Cs.…”

Section: Materials and Methodsmentioning

confidence: 99%

Separation of Ultratraces of Radiosilver from Radiocesium for Environmental Nuclear Forensics

et al. 2020

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The presence of environmental radiosilver and the investigation of the 108m Ag/ 110m Ag isotopic ratio in the aftermath of a nuclear power plant accident provide valuable information on the condition of the control rods of pressurized water reactors. However, the detection of minute amounts of the γemitting radiosilver isotopes is often thwarted by the presence of concomitant and dominating γ emitters, primarily 137 Cs, which results in increased detection limits in the γ spectra. We developed a rapid and robust separation protocol for trace silver extraction in the presence of overwhelming activities of 137 Cs via the autodepostion of silver on a copper plate. This method achieved a quantitative removal of interfering 137 Cs in the deposition product and proved to be very efficient (yields >70% for aqueous samples), rapid (results within 4 h), and robust with respect to varying salinities and composition of the water samples. The autodeposition approach is also applicable for organic samples after acidassisted microwave digestion. By applying the established sequential extraction protocols for soil, the fate of freshly deposited radiosilver and radiocesium in soil was investigated. Silver showed a high affinity to the soil with a pronounced (>90%) accumulation in the residual fraction after the sequential extraction, whereas radiocesium exhibited higher mobility, allowing for the extraction of major fractions in the first extraction steps. The composition of the aqueous contamination matrix (CaCl 2 or Ca(NO 3 ) 2 ) had a significant influence on the binding properties of cesium on soil.

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