Ammonia Removal from Aqueous Solution by Zeolites Synthesized from Coal Fly Ash
The removal of ammonia from aqueous solutions using zeolites (ZFAs) synthesized from coal fly ash (CFA) as low-cost absorbent was investigated in a batch mode. When raw CFA was subjected to alkaline hydrothermal zeolite synthesis, the Zeolite X (ZFA-X) and zeolite A (ZFA-A) were formed. ZFAs had a much greater ability than CFA to remove ammonia. The pH strongly influenced ammonia removal by ZFAs. The higher removal efficiency was achieved when operating at pH between 6? and 8.5 for the ZFAs. From ammonia solution of initial concentration equal to 100 mg/L, the removal percentage reached values of 18.4, 76.8, and 82.1％, respectively, for CFA, ZFA-A and ZFA-X at room temperature, pH = 7.5, sorbent dose of 15 g/L, and contact time of 0.5 h. The experimental results indicated that ZFAs may be promising materials for tile purification of ammonia from water/wastewater.
Ammonia removal coal fly ash zeolite X zeolite A adsorption
Xingyu Cui Shuwei Chen Xuning zhang Jinghong Ma Ruifeng Li
Institute of Special Chemicals, Taiyuan University of Technology, Taiyuan 030024, China College of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, Chi Institute of Special Chemicals, Taiyuan University of Technology, Taiyuan 030024, China College of C
国际会议
深圳
英文
806-808
2011-03-28（万方平台首次上网日期，不代表论文的发表时间）