Abstract

Forms of ²²⁶Ra and ²³²Th in soddy-podzolic-gley concretion soil are studied. It has been shown that the sum of ²²⁶Ra fractions available for plants (water-soluble and exchangeable) and mobile (water-soluble, exchangeable, and mobile) is 2–10 times higher as compared to ²³²Th under regular excessive moistening by surface waters and alternation of reduction and oxidation conditions. Segregated ferruginous concretions formed in the eluvial horizons of this soil exert a slight effect on the mobility of ²²⁶Ra but significantly reduce that of ²³²Th, a significant portion of which is firmly fixed inside the crystal lattices of newly formed minerals.

中文翻译：

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Soddy-Podzolic-Gley耕作土壤中226 Ra和232 Th的形态

摘要

表格²²⁶ Ra和²³²在索迪-灰化，潜育土凝固钍进行了研究。研究表明，在表面经常过度润湿的情况下，可用于植物（水溶性和可交换）和活动性（水溶性，可交换和活动性）的²²⁶ Ra馏分的总和比²³² Th高2-3倍。水和还原和氧化条件的交替。在该土壤的冲积层中形成的分离的铁质凝结物对²²⁶ Ra的迁移率有轻微影响，但显着降低了²³² Th的迁移率，其中相当大的一部分牢固地固定在新形成的矿物的晶格内。