微波对吸附氨氮饱和沸石的再生

发布时间：2018-04-27 01:27

本文选题：氨氮 + 饱和沸石　；参考：《湖南大学学报(自然科学版)》2016年12期

【摘要】：以吸附氨氮饱和的斜发沸石为研究对象,分别采用单独微波辐射及微波辅助溶剂法对其进行再生研究.研究发现,单独微波辐射再生效果较差,功率462 W,微波辐射12min,饱和沸石再次去除率为32.31%,再生率仅为44.88%;添加NaCl和NaOH混合液可以大大增强饱和沸石的再生效果,在NaCl和NaOH混合液浓度均为0.01mol/L,固液比1∶50,功率700W,微波辐射4min时,最佳去除率为71.92%,再生率接近100%.通过FTIR,SEM,EDS等测试手段对改性、吸附、再生前后的沸石分析发现,沸石在改性、吸附、再生过程中主要发生的是不同阳离子间交换过程.微波辐射加速了NH4+与Na+交换过程且加深了离子交换平衡程度,因此微波辅助溶剂法具有再生迅速、完全,多次再生效果基本不衰减的优点.
[Abstract]:The regeneration of clinoptilolite adsorbed on ammonia nitrogen was studied by microwave irradiation and microwave assisted solvent method. It was found that the regeneration efficiency of saturated zeolite was 32.31 and only 44.88 after microwave irradiation for 12 mins, and the regeneration efficiency was only 44.88.The regeneration effect of saturated zeolite could be greatly enhanced by adding the mixture of NaCl and NaOH. When the mixture concentration of NaCl and NaOH is 0.01mol / L, the ratio of solid to liquid is 1: 50, the power is 700W, the optimum removal rate is 71.92% and the regeneration rate is close to 100W under microwave irradiation of 4min. The analysis of zeolite before and after modification, adsorption and regeneration by means of FTIR SEM-EDS showed that the exchange process between different cations occurred mainly in the process of modification, adsorption and regeneration of zeolites. Microwave radiation accelerates the exchange process between NH4 and Na and deepens the ion exchange equilibrium, so microwave assisted solvent method has the advantages of rapid regeneration, complete regeneration and multiple regeneration without attenuation.
【作者单位】：北京科技大学能源与环境工程学院;工业典型污染物资源化处理北京市重点实验室;
【基金】：国家自然科学基金资助项目(51174017)~~
【分类号】：X52;O647.3

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