Removal of ammonium from wastewater using calcium form clinoptilolite

被引：118
作者：
Ji, Zhi-Yong
Yuan, Jun-Sheng
Li, Xin-Gang [1 ]
机构：
[1] Tianjin Univ, Sch Chem Engn & Technol, Tianjin 300072, Peoples R China
[2] Hebei Univ Technol, Sch Chem Engn & Technol, Tianjin 300130, Peoples R China
[3] Tianjin Univ, Natl Engn Res Ctr Distillat Technol, Tianjin 300072, Peoples R China
来源：
JOURNAL OF HAZARDOUS MATERIALS | 2007年 / 141卷 / 03期
关键词：
ammonium removal; clinoptilolite; wastewater; thermodynamics; ION-EXCHANGE; ZEOLITE; WASTEWATERS; METALS;
D O I：
10.1016/j.jhazmat.2006.07.010
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
The paper concerns the removal of ammonium ions from aqueous solution using a modified clinoptilolite-Ca2+-formed clinoptilolite (CaY) prepared from natural clinoptilolite. The batch study results show that the pH has an effect on ammonium adsorption capacity as it can influence both the character of the exchanging ions and the clinoptilolite itself; the CaY has a high selectivity to NH4+ and the exchange decreases with increasing temperature; ammonium ion uptake onto CaY was suitably described by the Langmuir model. The column results indicated that the effluent of simulated wastewater treated with CaY could meet the integrated wastewater discharge standard of China, and CaY can be circulated through regenerating by Ca(OH)(2). (c) 2006 Elsevier B.V. All rights reserved.
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收藏
页码：483 / 488
页数：6
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