Uranium sorption from saline lake brine by amidoximated silica

Uranium sorption from saline lake brine by amidoximated silica
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偕胺肟化二氧化硅从盐湖卤水中吸附铀

DOI:
10.1007/s10967-017-5283-1
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发表时间:
2017-05
影响因子:
1.6
通讯作者:
Qin Zhi
Qin Zhi
中科院分区:
化学4区
文献类型:
--
作者:
Yin Xiaojie;Bai Jing;Tian Wei;Li Sa;Wang Jieru;Wu Xiaolei;Wang Yang;Fan Fangli;Huang Qinggang;Qin Zhi

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采用共缩聚法制备了一系列不同偕胺肟含量的硅质吸附剂,并将其用于盐湖卤水中铀的提取。确定了最佳偕胺肟基含量,并考察了pH对铀吸附的影响。吸附动力学和等温线进行了研究。XPS分析表明,铀的吸附机理是铀酰离子与偕胺肟中的氮原子相互作用。氨肟化二氧化硅能有效吸附青海盐湖卤水中的天然铀。
A series of silica sorbents with different content of amidoxime groups were prepared through co-condensation method and applied to extract uranium from saline lake brine. The optimum amidoxime group content was determined and effects of pH on uranium sorption were investigated. Sorption kinetic and isotherms were also investigated. XPS analysis indicated that the adsorption mechanism of uranium was attributed to the interaction between uranyl ion and N in the amidoxime. Amidoximated silica could efficiently absorb the naturally occurring uranium in the saline lake brine samples from Qinghai, China.
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