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Phase Transformations in an Alkaline Titanosilicate System upon Variation of the Temperature and Time Parameters
Doklady Chemistry ( IF 0.8 ) Pub Date : 2020-03-01 , DOI: 10.1134/s0012500820030039
L. G. Gerasimova , A. I. Nikolaev , E. S. Shchukina , M. V. Maslova

Abstract Using X-ray diffraction study of the solid phases formed in an alkaline titanosilicate system with an invariable concentration of components upon process temperature variation in the 180–210°C range and time variation from 1 to 7 days, structural genesis of the solid phases was established. This allowed predicting the final result, consisting in the formation of an ion exchange material as a powder or granules with a high sorption capacity for Cs + and Sr 2+ cations. The formation of granules of the titanosilicate sorbent with a colloidal silicon binder induced agglomeration of particles with partial isolation of their pore system, which decreased the sorption capacity for Cs + by a factor of 1.5. Simultaneously, the uptake of Sr 2+ increased by 10–15% due to the formation of insoluble Sr 2+ silicate or hydroxide on the surface with pH of 8.5–9.5.

中文翻译:

温度和时间参数变化时碱性钛硅酸盐体系中的相变

摘要 利用 X 射线衍射研究在 180–210°C 范围内的工艺温度变化和 1 到 7 天的时间变化下,组分浓度不变的碱性钛硅酸盐体系中形成的固相,确定了固相的结构起源建立了。这允许预测最终结果,包括形成粉末或颗粒形式的离子交换材料,对 Cs + 和 Sr 2+ 阳离子具有高吸附能力。具有胶体硅粘合剂的钛硅酸盐吸附剂颗粒的形成引起颗粒团聚,其孔隙系统部分隔离,这将 Cs + 的吸附能力降低了 1.5 倍。同时地,
更新日期:2020-03-01
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