Effect of sodium chloride on microwave-assisted removal of ammonia nitrogen by natural zeolite

LIN Hai; YANG Su; HUO Hanxin; DONG Yingbo; MA Qijun

doi:10.3969/j.issn.0438-1157.2013.08.041

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Effect of sodium chloride on microwave-assisted removal of ammonia nitrogen by natural zeolite

更新时间：2025-12-10

- Effect of sodium chloride on microwave-assisted removal of ammonia nitrogen by natural zeolite
- CIESC Journal Issue 8, Pages: 2989-2995(2013)
- 作者机构：
  
  北京科技大学土木与环境工程学院,北京,100083
- 作者简介：
- 基金信息：
- DOI：10.3969/j.issn.0438-1157.2013.08.041
  CLC： 703.5
- Online First：05 August 2013，
  
  Published：05 August 2013
- 稿件说明：
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LIN Hai, YANG Su, HUO Hanxin, et al. Effect of sodium chloride on microwave-assisted removal of ammonia nitrogen by natural zeolite[J]. CIESC Journal, 2013, (8): 2989-2995.
DOI：

LIN Hai, YANG Su, HUO Hanxin, et al. Effect of sodium chloride on microwave-assisted removal of ammonia nitrogen by natural zeolite[J]. CIESC Journal, 2013, (8): 2989-2995. DOI： 10.3969/j.issn.0438-1157.2013.08.041.

摘要

通过添加助剂NaCl在微波下对天然沸石进行加热制备环境材料

研究了微波后沸石对再生水中氨氮的去除效果。研究发现

助剂预处理可以大大提高微波沸石的脱氮效果。在沸石与NaCl溶液固液比1:50

NaCl溶液浓度4%

343 W的微波功率加热4 min的条件下

微波沸石环境材料对氨氮的去除效果最好

最佳去除率可达99.70%;单独进行343 W、4 min的微波加热沸石对氨氮的去除率为76.46%;相对于天然沸石

上述两种微波沸石对氨氮去除率分别提高了39%、15.76%。通过SEM、EDS、XRD等表征手段对微波前后的沸石分析发现

在微波加热过程中助剂氯化钠的加入使沸石颗粒表面更加松散

出现了更多的孔道

同时天然沸石Ca、Mg、P、S峰消失

主衍射峰强度有所减弱

出现了部分非晶化特征。

Abstract

The effect of additive NaCl on microwave-assisted removal of ammonia nitrogen by natural zeolite

including factors influencing adsorption and ion-exchange

was investigated.The results show that microwave-assisted can greatly improve the efficiency of zeolite denitrification.The best conditions are:microwave power 343 W

time 4 min

concentration of NaCl 4%

size of zeolite particles 0.1-0.15 mm

and the best removal efficiency is up to 99.70%.As a comparison

no NaCl addition but microwave auxiliary

the removal rate of ammonia nitrogen by zeolite is 76.46%. If only zeolite was employed the removal rate is 60.70%.So the increase of efficiency is significant

39%

15.76% respectively. The results of zeolite surface morphology and element measurements by SEM

EDS and XRD indicated that sodium chloride could improve microwave heating and ion exchange of zeolite.Its ion exchange capacity for ammonia at microwave condition increases greatly by NaCl.

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