Synthesis of zeolites using fly ash and their application in removing heavy metals from waters

被引：0
作者：
Yanxin Wang
Yonglong Guo
Zhihua Yang
Hesheng Cai
Querol Xavier
机构：
[1] China University of Geosciences,Department of Hydrogeology and Environmental Engineering
[2] China University of Mining and Technology,Coal Resource Laboratory of the Ministry of Education of China
[3] CSIC,Institute of Earth Sciences “Jaume Aimera”
来源：
Science in China Series D: Earth Sciences | 2003年 / 46卷
关键词：
coal fly ash; hydrothermal synthesis; zeolite; heavy metal; wastewater; adsorption;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Three types of zeolite (NaP1 zeolite, analcime and chabazite) were hydrothermally synthesized by reacting fly ash with NaOH solution. The maximum conversion rate from fly ash to single zeolite is about 40%–75%, and the total conversion rate 60%–80%. The synthesis experimental results indicate that factors including vortex, viscosity, temperature, reaction time, and NaOH concentration in the reaction system strongly affect the type and conversion rate of zeolites. The batch experiments of removing Cu2+, Pb2+ and Cd2+ from wastewaters show that the adsorption capacity of zeolites synthesized is higherthan that of fly ash.
引用
收藏
页码：967 / 976
页数：9
相关论文
共 20 条
[1]  
Holler H.(1985)Zeolite formation from fly ash Forschr. Miner. 63 21-43
[2]  
Wirsching U.(1995)Resource recovery of waste fly ash: Synthesis of zeolite-like materials Environmental Science and Technology 29 1109-1117
[3]  
Lin C.-F.(1997)A fast method for recycling fly ash: Microwave-assisted zeolite synthesis Environmental Science and Technology 31 2527-2533
[4]  
His H. C.(1995)Cation exchange properties of hydrothermally treated coal fly ash Environmental Science and Technology 29 1748-1753
[5]  
Querol X.(1998)The synthesis of zeolites from fly ash and the properties of the zeolite products Journal of Geochemical Exploration 62 305-309
[6]  
Alastuey A.(1992)Preparation and characterisation of zeolites from coal fly ash Journal of Chemical Society of Japan 5 484-492
[7]  
Lopez-Soler A.(2002)Application of zeolitic material synthesised from fly ash to the decontamination of waste water and flue gas Journal of Chemical Technology and Biotechnology 77 292-298
[8]  
Siger A.(2002)Zeolitic material synthesized from fly ash: Use as cationic exchanger Journal of Chemical Technology and Biotechnology 77 299-304
[9]  
Bergaut V.(undefined)undefined undefined undefined undefined-undefined
[10]  
Steenbruggen G.(undefined)undefined undefined undefined undefined-undefined
12