Association of Radionuclides with Colloids in Soil Solutions

Association of Radionuclides with Colloids in Soil Solutions
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DOI:
10.1134/s1066362209020209
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发表时间:
2009-04-01
期刊:
影响因子:
0.9
通讯作者:
Myasoedov, B. F.
Myasoedov, B. F.
中科院分区:
其他
文献类型:
--
作者:
Goryachenkova, T. A.;Kazinskaya, I. E.;Myasoedov, B. F.

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通过超滤研究了土壤提取物中 Pu 和 Am 与不同尺寸颗粒的结合。在水提取物中,Pu 和 Am 浓度取决于土壤类型和水溶液组成。在水提取物中,60% 至 100% 的放射性核素和有机碳与精细胶体颗粒 ( 100 kDa ) 相关;大约 25% 与 MW 50-10 kDa 的部分相关;2-4% 与 MW < 3 kDa 的低分子量部分相关。在黄腐酸组中,44-49% 的放射性核素存在于 MW 50-10 kDa 的部分中。 MW > 100 kDa,以及 MW < 3 kDa 的部分为 42-51%。
Association of Pu and Am with variously sized particles in soil extracts is studied by ultrafiltration. In aqueous extracts, the Pu and Am concentrations depend on the soil type and aqueous solution composition. In the aqueous extracts, from 60 to 100% of the radionuclides and organic carbon are associated with fine colloidal particles ( 100 kDa; about 25%, with the fraction with MW 50-10 kDa; and 2-4%, with the low-molecular-weight fraction with MW < 3 kDa. In the group of fulvic acids, 44-49% of the radionuclides is found in the fraction with MW > 100 kDa, and 42-51%, in the fraction with MW < 3 kDa.