Preparation of spherical hydroxycancrinite from potassic rocks activated by sub-molten salt

被引：0

作者：

Liu C. ^{[1
]}

Li Y. ^{[1
]}

Guo H. ^{[1
]}

Cao J. ^{[1
]}

机构：

[1] Engineering Research Center of Seawater Utilization Technology of Ministry of Education, School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin

来源：

Gao Xiao Hua Xue Gong Cheng Xue Bao/Journal of Chemical Engineering of Chinese Universities | 2023年 / 37卷 / 04期

关键词：

Cu(II) adsorption; hydrothermal reaction; potassic rocks; spherical hydroxycancrinite; sub-molten salt method;

D O I：

10.3969/j.issn.1003-9015.2023.04.014

中图分类号：

学科分类号：

摘要：

The spherical hydroxycancrinite was successfully prepared by hydrothermal reaction from potassic rocks activated by sub-molten salt method for utilizing potassic rocks as raw materials. The effects of hydrothermal reaction temperature, n(H2O)/n(K2O) ratio and reaction time on the synthesis of spherical hydroxycancrinite were investigated. The experimental results show that the suitable conditions for the hydrothermal reaction are reaction temperature of 150 ℃, n(H2O)/n(K2O) of 38.62, and reaction time of 12 h. The hydroxysodalite is firstly formed from the activated potassic rocks during hydrothermal reaction, and then transformed to the spherical hydroxycancrinite under the salting-out effect of K+. The filtrate from the synthesis of hydroxycancrinite could be recycled to decompose potassic rocks after preparing calcium silicate hydrate. Cu(II) adsorption on the synthesized hydroxycancrinite was carried out, and the maximum adsorption capacity was 51.76 mg·g−1. The adsorption kinetics of Cu(II) on hydroxycancrinite conformed to the pseudo-second-order model, and the isothermal adsorption fitted into the Langmuir model. © 2023 Zhejiang University. All rights reserved.

引用

页码：623 / 632

页数：9

共 36 条

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