Abstract

Composite materials have been obtained on the basis of vermiculite modified with copper ferrocyanide and the subsequent treatment with chitosan. Preliminarily, vermiculite was treated with hydrochloric acid and then cellulose, with the subsequent precipitation of all the salts that passed into solution with ammonia. Further, a sample was modified with copper ferrocyanide and then chitosan was deposited. The composition and properties of vermiculite samples were examined by energy-dispersive method of analysis, IR spectroscopy, positron-annihilation spectroscopy (PAS), diffraction analysis and also by means of nitrogen adsorption at low temperature a and adsorption of Methylene Blue. The specific surface area and the internal volume were found for the samples crushed in accordance with the modification stage. The PAS data were used to calculate the specific volumes of positron and positronium annihilations, which were correlated with the data on the low-temperature adsorption of nitrogen. Model solutions were used to examine the sorption properties of the modified vermiculites for ¹³⁷Cs in salt solutions. The sorption isotherms were used to calculate the ultimate sorption capacity of the materials. For samples modified with copper ferrocyanide and chitosan it reaches values of 260 and 660 mg/g, respectively.

中文翻译：

---

用亚铁氰化铜改性蛭石以从液盐介质中选择性提取 137Cs 的方法

摘要

在蛭石经亚铁氰化铜改性后，再经壳聚糖处理得到复合材料。最初，蛭石先用盐酸处理，然后用纤维素处理，随后所有的盐都与氨一起沉淀。此外，样品用亚铁氰化铜改性，然后沉积壳聚糖。通过能量色散分析法、红外光谱、正电子湮没光谱（PAS）、衍射分析以及低温氮气吸附和亚甲基蓝吸附来检测蛭石样品的组成和性质。求出按照改性阶段粉碎的样品的比表面积和内部体积。PAS数据用于计算正电子和正电子湮没的比体积，这与氮的低温吸附数据相关。模型解决方案用于检查改性蛭石的吸附性能¹³⁷ Cs 在盐溶液中。吸附等温线用于计算材料的最终吸附容量。对于用亚铁氰化铜和壳聚糖改性的样品，它分别达到 260 和 660 mg/g 的值。