Hydrothermal synthesis of pollucite, analcime and their solid solutions and analysis of their properties

JOURNAL OF NUCLEAR MATERIALS

卷:488

Article

Jing, Zhenzi¹  Cai, Kunchuan¹  Li, Yan¹  Fan, Junjie¹  Zhang, Yi¹  Miao, Jiajun¹  Chen, Yuqian¹  Jin, Fangming² 

[1] Tongji Univ, Key Lab Adv Civil Engn Mat, Minist Educ, 4800 Caoan Rd, Shanghai 201804, Peoples R China

[2] Shanghai Jiao Tong Univ, Sch Environm Sci & Engn, 800 Dongchuan Rd, Shanghai 200240, Peoples R China

关键词: Analcime;    Pollucite;    Solid solution;    Hydrothermal synthesis;   

DOI  :  10.1016/j.jnucmat.2017.03.008

来源: Elsevier

【 摘 要 】

Pollucite, as a perfect long-term potential host for radioactive Cs immobilization, barely exists in pure form naturally but in an isomorphism form between pollucite and analcime due to coexistence of Cs and Na. Pollucite could be hydrothermally synthesized with Cs-polluted soil or clay minerals which contain Cs and Na, and it is necessary to study the properties of the synthesis if Cs and Na contained. Pure pollucite, analcime and their solid solutions were hydrothermally synthesized with chemicals, and it was found that the most formed pollucite analcime solid solutions with Cs/(Cs + Na) ratios of 2/6-5/6 had very similar properties in mineral composition, morphology and size, structural water (Cs cations) and coordination environment to pollucite. This also suggests that even coexistence of Cs and Na in nature, pollucite favors to form due to site preference for Cs over Na, which leads to the property and the structure of the most solid solutions similar to that of pollucite. (C) 2017 Elsevier B.V. All rights reserved.

【 授权许可】

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