东北大学学报（自然科学版）

东北大学学报（自然科学版） ›› 2013, Vol. 34 ›› Issue (12): 1778-1782.DOI: 10.12068/j.issn.1005-3026.2013.12.025

• 资源与土木工程 • 上一篇    下一篇

焙烧改造对沸石特征及其去除氨氮性能的影响

霍汉鑫，林海，董颖博，刘泉利   

  1. (北京科技大学土木与环境工程学院，北京100083)
  • 发布日期:2013-07-09
  • 通讯作者: 霍汉鑫
  • 作者简介:霍汉鑫(1985-)，男，黑龙江绥化人，北京科技大学博士研究生；林海(1966-)，男，北京人，北京科技大学教授，博士生导师.
  • 基金资助:
    国家自然科学基金资助项目(51174017).

Effects of Roasting Modification on the Characteristics and AmmoniumNitrogen Removal Ability of Zeolite〓

HUO Hanxin， LIN Hai， DONG Yingbo， LIU Quanli   

  1. Civil and Environmental Engineering School， University of Science and Technology Beijing， Beijing 100083， China.
  • Published:2013-07-09
  • Contact: LIN Hai
  • About author:-
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摘要： 以天然斜发沸石为研究对象，通过不同温度及时间梯度焙烧改造天然斜发沸石，重点研究了焙烧改造后沸石结构特征的变化以及对再生水中氨氮去除性能的影响.结果表明:在适宜的焙烧温度和时间下，天然斜发沸石因孔道内部水分及杂质脱除，比表面积增大，而晶体结构和孔径分布特征无明显变化，且阳离子交换容量并不增加，但对水中氨氮去除率由5315%提高到7213%；而过高温度及过长时间的焙烧改造沸石，导致沸石特征衍射峰减弱，骨架结构出现坍塌，比表面积与阳离子交换容量大幅下降，孔径分布特征变化明显，对水中氨氮的去除率明显下降.

关键词: 天然沸石, 焙烧改造, 孔径分布, 氨氮, 比表面积

Abstract: The natural clinoptilolite as the object of study， which were modified by roasting at different temperature and time gradient， the changes of structural characteristics and ammonianitrogen removal ability in recycled water for zeolite after roasting modification were studied emphatically. The results showed that specific surface of zeolite increased， crystal structure， pore size distribution and cation exchange capacity of zeolite changed slightly， but ammoniumnitrogen removal rates increased from 5315% to 7213%， because of the remove of water and impurity in the pore channel for natural clinoptilolite in the suitable roasted temperature and time. While the zeolite roasted in overtemperature and excessive time， characteristic diffraction peak of natural zeolite became weaker， the framework collapsed， specific surface area and cation exchange capacity decreased dramatically， pore size distribution changed significantly， and ammoniumnitrogen removal ability decreased significantly.

Key words: natural zeolite, roasting modification, pore size distribution, ammoniumnitrogen, specific surface area

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