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| Synthesis of zeolites using fly ash and their application in removing heavy metals from waters | |
| 作者姓名： | 王焰新 郭永龙 杨志华 蔡鹤生 Xavier Querol |
| 作者单位： | Department of Hydrogeology and Environmental Engineering，China University of Geosciences，Wuhan 430074，China，Coal Resource Laboratory of the Ministry of Education of China，China University of Mining and Technology，Beijing 100083，China，Department of Hydrogeology and Environmental Engineering，China University of Geosciences，Wuhan 430074，China，Department of Hydrogeology and Environmental Engineering，China University of Geosciences，Wuhan 430074，China，Institute of Earth Sciences “Jaume Almera” CSIC，08028 Barcelona，Spain |
| 基金项目： | 国家自然科学基金，高等学校优秀青年教师教学科研奖励计划 |
| 摘 要： | Fly ash is the solid waste of thermal power plants where coal is used as fuel, and its management and utilization have been of environmental concern for decades. Since the technique of synthesizing zeolite from coal fly ash was introduced by Holler1] (19… |
Synthesis of zeolites using fly ash and their application in removing heavy metals from waters |
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| Yanxin Wang, Yonglong Guo, Zhihua Yang, Hesheng Cai and Querol Xavier.Synthesis of zeolites using fly ash and their application in removing heavy metals from waters[J].Science in China(Earth Sciences),2003,46(9):967-976. | |
| Authors: | Yanxin Wang Yonglong Guo Zhihua Yang Hesheng Cai and Querol Xavier |
| Affiliation: | 1. Department of Hydrogeology and Environmental Engineering, China University of Geosciences, Wuhan 430074, China 2. Coal Resource Laboratory of the Ministry of Education of China, China University of Mining and Technology, Beijing 100083, China 3. Institute of Earth Sciences "Jaume Almera", CSIC, 08028 Barcelona, Spain |
| Abstract: | 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 higher than that of fly ash. |
| Keywords: | coal fly ash hydrothermal synthesis zeolite heavy metal wastewater adsorption |
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