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

Hou, J., Yuan, J., Xu, J., Fu, Y., & Meng, C. (2013). Template-free synthesis and characterization of K-phillipsite for use in potassium extraction from seawater. Particuology, 11(6), 786–788. https://doi.org/10.1016/j.partic.2013.02.003

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

Jin Hou ^{a b}, Junsheng Yuan ^b *, Jia Xu ^a, Yunpeng Fu ^a, Chunxia Meng ^a

a Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China
b Engineering Research Center of Seawater Utilization Technology, Ministry of Education, Hebei University of Technology, Tianjin 300130, China

10.1016/j.partic.2013.02.003

Volume 11, Issue 6, December 2013, Pages 786-788

Received 25 May 2012, Revised 29 January 2013, Accepted 7 February 2013, Available online 9 May 2013.

E-mail: jhhxhg@163.com

Highlights

• K-phillipsite was prepared without organic template.

• The ion-exchange capacity of the prepared K-phillipsite to K⁺ is 51 mg/g in seawater.

• The selectivity coefficient to K⁺ is 75.1 in the mixed K⁺–Na⁺ solution.

Abstract

K-phillipsite 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 conducted 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.

Graphical abstract

Keywords

K-phillipsite; Template-free; Potassium extraction; Seawater

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