Template-free synthesis and characterization of K-phillipsite for use in potassium extraction from seawater

Kbphillipsite was prepared using a hydrothermal method. Soluble glass and sodium aluminate were used as raw materials in the absence of an organic template. Investigations regarding the K＋ ions were con- ducted at room temperature to determine the ion-exchange capacity in the seawater sample and the...

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Bibliographic Details
Published in:Particuology 2013-12, Vol.11 (6), p.786-788
Main Authors: Hou, Jin, Yuan, Junsheng, Xu, Jia, Fu, Yunpeng, Meng, Chunxia
Format: Article
Language:English
Subjects:
Coefficients
Diffraction
Dispersions
K-phillipsite
Potassium
Potassium extraction
Raw materials
Scanning electron microscopy
Sea water
Seawater
Selectivity
Template-free
扫描电子显微镜
模板剂
沸石
海水样品
离子交换容量
表征
选择性系数
钾提取
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Summary:Kbphillipsite was prepared using a hydrothermal method. Soluble glass and sodium aluminate were used as raw materials in the absence of an organic template. Investigations regarding the K＋ ions were con- ducted at room temperature to determine the ion-exchange capacity in the seawater sample and the selectivity coefficient of the mixed K＋-Na~ solution. The sample was characterized by X-ray diffraction （XRD）, scanning electron microscopy （SEM）, and energy dispersion spectroscopy （EDS）. The K＋ ion- exchange capacity is 51 mg/g in seawater and the selectivity coefficient is 75.1 in the mixed K＋-Na＋ solution. The sample has a selectivity preference for K＋, and therefore can be used to selectively extract potassium from seawater. The sample composed of Si, Al, K, Na, and O exhibits a cross-like shape and is a typical K-phillipsite structure.
ISSN:1674-2001
2210-4291
DOI:10.1016/j.partic.2013.02.003