Immobilization of cesium from aqueous solution using nanoparticles of synthetic calcium phosphates.

Q1 Chemistry
Oksana Livitska, Nataliia Strutynska, Kateryna Loza, Oleg Prymak, Yuriy Prylutskyy, Olha Livitska, Matthias Epple, Nikolai Slobodyanik
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引用次数: 3

Abstract

The particularities of cesium incorporation into synthetic calcium phosphates with either apatite or whitlockite-type structures were investigated using the sorption process from aqueous solution and further heating to 700 °C. The nanoparticles for sorption were prepared by wet precipitation from aqueous solutions at a fixed molar ratio of Ca/P = 1.67 and two different ratios of CO32-/PO43- (0 or 1). The obtained substituted calcium phosphates and corresponding samples after the sorption of cesium from solutions with different molar concentrations (c(Cs+) = 0.05, 0.1 and 0.25 mol L-1) were characterized by powder X-ray diffraction, FTIR spectroscopy, scanning electron microscopy and elemental analysis. Based on the combination of X-ray diffraction and elemental analyses data for the powders after sorption, the cesium incorporated in the apatite- or whitlockite-type structures and its amount increased with its concentration in the initial solution. For sodium-containing calcium phosphate even minor content of Cs+ in its composition significantly changed the general principle of its transformation under annealing at 700 °C with the formation of a mixture of α-Ca3(PO4)2 and cesium-containing apatite-related phase. The obtained results indicate the perspective of using of complex substituted calcium phosphates nanoparticles for immobilization of cesium in the stable whitlockite- or apatite-type crystal materials.

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合成磷酸钙纳米颗粒固定化水溶液中的铯。
通过从水溶液中吸附铯,并进一步加热至700℃,研究了铯掺入具有磷灰石或白蜡石型结构的合成磷酸钙中的特殊性。采用湿沉淀法从固定摩尔比Ca/P = 1.67和CO32-/PO43-(0或1)两种不同摩尔浓度(c(Cs+) = 0.05、0.1和0.25 mol L-1)的水溶液中制备了用于吸附铯的纳米颗粒。采用粉末x射线衍射、FTIR光谱、扫描电镜和元素分析对吸附铯后得到的取代磷酸钙和相应的样品进行了表征。根据吸附后粉末的x射线衍射和元素分析数据,铯以磷灰石或白纹石型结构存在,其含量随初始溶液浓度的增加而增加。对于含钠磷酸钙,即使其成分中Cs+的含量很少,也会显著改变其在700℃退火下转变的一般原理,形成α-Ca3(PO4)2和含铯磷灰石相关相的混合物。研究结果表明,复合取代磷酸钙纳米颗粒在稳定的白介石或磷灰石型晶体材料中固定化铯具有广阔的应用前景。
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来源期刊
Chemistry Central Journal
Chemistry Central Journal 化学-化学综合
CiteScore
4.40
自引率
0.00%
发文量
0
审稿时长
3.5 months
期刊介绍: BMC Chemistry is an open access, peer reviewed journal that considers all articles in the broad field of chemistry, including research on fundamental concepts, new developments and the application of chemical sciences to broad range of research fields, industry, and other disciplines. It provides an inclusive platform for the dissemination and discussion of chemistry to aid the advancement of all areas of research. Sections: -Analytical Chemistry -Organic Chemistry -Environmental and Energy Chemistry -Agricultural and Food Chemistry -Inorganic Chemistry -Medicinal Chemistry -Physical Chemistry -Materials and Macromolecular Chemistry -Green and Sustainable Chemistry
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