SHORT COMMUNICATION
Influence of Modified Coal Fly Ash
on Its Cation Exchange Capacities
Huaigang Cheng, Huiping Song, Fangbin Xue, Xiaojing Chen, Fangqin Cheng
State Environment Protection Key Laboratory of Efficient Utilization Technology of Coal Waste Resources,
Institute of Resources and Environment Engineering, Shanxi University, Taiyuan 030006, China
Institute of Resources and Environment Engineering, Shanxi University, Taiyuan 030006, China
Pol. J. Environ. Stud. 2014;23(4):1307-1312
KEYWORDS
ABSTRACT
Fly ash modified with sodium hydroxide calcination-hydrothermal was used to treat ammonia-nitrogen
wastewater. The mount of alkali, the solid-liquid ratio, and the temperature of calcination were investigated in
the process of modification. The best modified condition was when the ratio of sodium hydroxide and fly ash
was 0.4:1, the ratio of solid and liquid was 1:1, and the temperature of calcination was 400ºC. After modification,
the zeolite-like substances were produced from the fly ash and the cation exchange capacities (CEC)
increased from 5 to 81 mmol/100 g. The separation efficiency of the ammonia-nitrogen was up to 90%.
| eISSN: | 2083-5906 |
| ISSN: | 1230-1485 |
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