Preparation and characterization of merlinoite for potassium extraction from seawater

被引：17
作者：
Jin, Na [1 ]
Meng, Chunxia [1 ]
Hou, Jin [1 ]
机构：
[1] Ocean Univ China, Coll Chem & Chem Engn, Qingdao 266100, Peoples R China
来源：
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY | 2014年 / 20卷 / 04期
关键词：
Merlinoite; Template-free; Potassium extraction; Seawater; ORGANIC TEMPLATE; ZEOLITE; ABSENCE; ZSM-5;
D O I：
10.1016/j.jiec.2013.08.003
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
The preparation of zeolites for potassium extraction was extensively investigated by hydrothermal method without organic template. The K+ ion-exchange capacities of synthetic zeolites in seawater were tested. Merlinoite with high ion-exchange capacity was successfully synthesized in the synthesis gel with the molar composition of 15K(2)O:12SiO(2):Al2O3:570H(2)O. The K+ ion-exchange capacity of merlinoite is 58.7 mg/g in seawater, and therefore it can be used to extract potassium selectively from seawater. Merlinoite was characterized by X-ray diffraction, scanning electron microscopy and energy dispersion spectroscopy. Merlinoite crystal which is mainly composed of Si, Al, K and O exhibits a square pillar shape. (C) 2013 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.
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收藏
页码：1227 / 1230
页数：4
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