| 天然沸石在高温氨氮废水中的吸附特性研究 |
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| 引用本文： | 宋珩,魏刚,樊保民,乔宁.天然沸石在高温氨氮废水中的吸附特性研究[J].北京化工大学学报(自然科学版),2013,40(6):62-66. |
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| 作者姓名： | 宋珩 魏刚 樊保民 乔宁 |
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| 作者单位： | 北京化工大学材料科学与工程学院材料电化学过程与技术实验室,北京,100029;北京化工大学材料科学与工程学院材料电化学过程与技术实验室,北京,100029;北京化工大学材料科学与工程学院材料电化学过程与技术实验室,北京,100029;北京化工大学材料科学与工程学院材料电化学过程与技术实验室,北京,100029 |
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| 基金项目： | 国家高技术研究发展计划（863计划） |
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| 摘 要： | 采用天然沸石颗粒处理模拟氨氮废水，对比研究了常温和中高温下沸石吸附效果的差异，探讨了高温下吸附过程的热力学，并优化了高温下沸石吸附氨氮废水的操作工艺。研究结果表明：天然沸石适合处理高温氨氮废水；氨氮在天然沸石颗粒上的等温吸附符合Freundlich等温吸附模型，达到极显著相关（R2>0.99）；在50℃以上的高温氨氮废水中，沸石用量在40~50g/L，沸石粒径为1~2mm，搅拌转速为400~800r/min，pH值维持在5~8之内，此时沸石的氨氮吸附质量比达到2.0mg/g以上。
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| 关 键 词： | 天然沸石 氨氮 高温废水 等温吸附模型 |
| 收稿时间： | 2013-04-16 |
Adsorptivity of natural zeolite towards ammonia from sewage at high temperatures |
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| SONG Heng,WEI Gang,FAN BaoMin,QIAO Ning.Adsorptivity of natural zeolite towards ammonia from sewage at high temperatures[J].Journal of Beijing University of Chemical Technology,2013,40(6):62-66. |
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| Authors: | SONG Heng WEI Gang FAN BaoMin QIAO Ning |
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| Institution: | Laboratory of Electrochemical Process and Technology for Materials, College of Materials Science and Engineering,Beijing University of Chemical Technology，Beijing 100029，China |
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| Abstract: | Ammonia nitrogen wastewater has been treated by natural zeolite particles and the differences in adsorption between normal temperature and mid high temperature were studied. In addition, the thermodynamics and the optimization of the adsorption at high temperature were investigated. The results indicated that this method is feasible and the ammonia nitrogen isothermal adsorption on the natural zeolite particles was fitted by the Freundlich equation with a high correlation coefficient R(R2>0.99). The effects of varying the process conditions on the adsorption characteristics showed that the absorption mass ratio of ammonia nitrogen wastewater on the natural zeolite (above 50℃)could reach over 2.0mg/g when the dosage of natural zeolite (particle diameter 1-2mm) was 40-50g/L with stirring around 400-800r/min in solutions with a pH value between 5 and 8. |
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