US EPA

476711 

Journal Article 

Pb-210 and stable lead content in fungi: Its transfer from soil 

Guillen, J; Baeza, A; Ontalba, MA; Miguez, MP 

2009 

1 

Science of the Total Environment
ISSN: 0048-9697
EISSN: 1879-1026 

ELSEVIER 

AMSTERDAM 

407 

14 

4320-4326 

English 

19403160 

10.1016/j.scitotenv.2009.03.025 

WOS:000267199900017 

The uptake and transfer of natural radionuclides, other than K-40, from soil to mushrooms has been somewhat overlooked in the literature. Their contribution to the dose due to the consumption of mushrooms was considered negligible. But the contribution of Pb-210 in areas unaffected by any recent radioactive fallout has been found to be significant, up to 35% of the annual dose commitment in Spain. More than 30 species of mushrooms were analyzed, and the Pb-210 detected was in the range of 0.75-202 Bq/kg d.w. A slight difference was observed between species with different nutritional mechanisms (saprophytes >= mycorrhizae). The Pb-210 content was correlated with the stable lead content, but not with its predecessor in the uranium radioactive series, Ra-226. This suggested that Pb-210 was taken up from the soil by the same pathway as stable lead. The bioavailability of Pb-210 in soil was determined by means of a sequential extraction procedure (NH4OAc, 1M HCl, 6M HCl, and residue). About 30% of the Pb-210 present in the soil was available for transfer to mushrooms. more than other natural radionuclides in the same ecosystem. Lycoperdon perlatum, Hebeloma cylindrosporum, and Amanita curtipes presented the highest values of the available transfer factor, ATE As reflected in their ATF values, the transfer from soil to mushroom of some natural and anthropogenic radionuclides was in the following order: Th-228,Th-230,Th-232 approximate to K-40 >= Cs-137 >= U-234,U-238 approximate to Ra-226 >= Sr-90 >= Pb-210 approximate to Pu239+240 approximate to Am-241. 

Mushroom; Pb-210; Transfer; Lead; Ra-226; Bioavailability; Soil; black-sea region; edible mushrooms; heavy-metals; pine forest; alpha-emitters; spain; turkey; radionuclides; radiocesium; po-210