Effect of seawater salinity on the synthesis of zeolite from coal fly ash

被引：8

作者：

Yu, Yanqing ^{[1
,2
,3
]}

Li, Xiaoliang ^{[4
]}

Zou, Xiaolan ^{[1
,2
]}

Zhu, Xiaobin ^{[1
,2
]}

机构：

[1] Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China

[2] Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China

[3] Tsinghua Univ, Sch Environm, Beijing 100084, Peoples R China

[4] Beijing Univ Chem Technol, State Key Lab Chem Resource Engn, Beijing 100029, Peoples R China

来源：

FRONTIERS OF ENVIRONMENTAL SCIENCE & ENGINEERING | 2014年 / 8卷 / 01期

基金：

国家高技术研究发展计划(863计划); 中国国家自然科学基金;

关键词：

coal fly ash (CFA); seawater salinity; zeolite synthesis; PAPER-SLUDGE ASH; HYDROTHERMAL REACTION; NA-X; CONVERSION; TEMPERATURE; ADSORPTION; PRECURSORS; CRYSTALLIZATION; MECHANISM; FUSION;

D O I：

10.1007/s11783-013-0493-4

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

A novel method for the synthesis of zeolite was developed in this paper. The synthesis was carried out by hydrothermal activation after alkali fusion and coal fly ash (CFA) was used as raw material with seawater of different salinities. Seawater salinity was varied from 32 to 88 for zeolite crystallization during the hydrothermal process. The results show that seawater salinity plays an important role in zeolite synthesis with CFA during hydrothermal treatment. The products were a mixture of NaX zeolite and hydroxysodalite; seawater salinity more strongly affected the crystallization than the type and chemical composition of the zeolites. The yield of CFA transformed into zeolite gradually rose with the increase in salinity, reaching a transformation rate of 48%-62% as the salinity increased from 32 to 88, respectively. The proposed method allows for the efficient disposal of by-products; therefore, the application of seawater in zeolite synthesis presents promising economic and ecological benefits.

引用

页码：54 / 61

页数：8

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