Through the example of the sorption-coprecipitation data for microelements simulating the corrosion, activation, and fission products, the nature of the isotherms of sorption of cations (M) by natural humic acids (HAs) was discussed. The dependence of the microelement distribution coefficient (K_d) on the ratio of the mass to volume of the HA solution in the 10–990 mg/L concentration range was associated with the occurrence of two parallel processes in the sorption system: competitive sorption of the M and Ca(II) ions by the HA precipitate and the formation of nonsorbable (K_d < 10 mL/g) complex of the M ion with high-molecular-weight organic compounds remaining in solution after HA precipitation. Optical spectroscopic data for the HA solutions and solutions above the solid HA precipitate revealed the presence of high-molecular-weight organic compounds in solution, as indicated by a maximum at 220 ± 20 nm and a shoulder at 264 ± 30 nm, characteristic for fulvic acids (FAs). A probable scheme of the interaction of the sorbate cations with the precipitate of HAs and their accompanying fulvic acid molecules was proposed. For the first time, removal of tritium (THO) from aqueous solutions by HA precipitates via isotope exchange reaction was reported.

中文翻译：

---

微量元素与腐殖酸共沉淀的相互作用

通过模拟微量元素的腐蚀，活化和裂变产物的吸附-共沉淀数据示例，讨论了天然腐殖酸（HAs）吸附阳离子（M）的等温线的性质。在10–990 mg / L浓度范围内，微量元素分布系数（K _d）对HA溶液的质量与体积之比的依赖性与吸附系统中两个平行过程的发生有关：竞争性吸附HA沉淀出M和Ca（II）离子并形成不可吸收的（K _dHA沉淀后，M离子与高分子量有机化合物的复合物<10 mL / g）保留在溶液中。HA溶液和固体HA沉淀物上方溶液的光谱数据表明，溶液中存在高分子量有机化合物，这是由黄腐病毒特征的，在220±20 nm处有最大值，在264±30 nm处有肩峰。酸（FAs）。提出了山梨酸酯阳离子与HAs及其伴随的富叶酸分子沉淀物相互作用的可能方案。首次报道了通过同位素交换反应通过HA沉淀从水溶液中去除removal（THO）。