Ammonia nitrogen removal from aqueous solution using zeolite modified by microwave-sodium acetate

被引：19
作者：
Dong Ying-bo [1 ,2 ]
Lin Hai [1 ,2 ]
机构：
[1] Univ Sci & Technol Beijing, Dept Environm Engn, Beijing 100083, Peoples R China
[2] Beijing Key Lab Resource Oriented Treatment Ind P, Beijing 100083, Peoples R China
来源：
JOURNAL OF CENTRAL SOUTH UNIVERSITY | 2016年 / 23卷 / 06期
基金：
中国国家自然科学基金;
关键词：
modified zeolite; microwave; sodium acetate; ammonia-nitrogen; sorption characterization; WASTE-WATER; SORPTION; ADSORPTION; KINETICS;
D O I：
10.1007/s11771-016-3186-x
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
The characteristics of the zeolite modified by microwave and sodium acetate and its sorption of ammonia-nitrogen from simulated water sample were investigated. The results show that the modified zeolite by microwave-sodium acetate (SMMZ) has a high sorption efficiency and removal performance. The ammonia-nitrogen removal rate of SMMZ reaches 92.90%. The surface of SMMZ becomes loose and some pores appear, the specific surface area, total pore volume and average pore diameter increase after modification. Compared to the natural zeolite, SMMZ has a more concentrated pore size distribution in the range of 0-10 nm. The cation exchange capacity (CEC) of SMMZ is higher than that of the natural zeolite. And the ammonia nitrogen removal rate is consistent with the change of CEC. The SMMZ possesses rapid sorption and slow balance characteristics and ammonia-nitrogen sorption is consistent with both Langmuir adsorption isotherm model and Freundlich adsorption isotherm model. The adsorption kinetics of ammonia-nitrogen follows the pseudo-second order kinetic model.
引用
收藏
页码：1345 / 1352
页数：8
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