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| 两种ZSM-5沸石分子筛吸附水中氨氮的研究 | |
| 引用本文： | 张健,万东锦,朱云云,康瑾,刘永德,王真真.两种ZSM-5沸石分子筛吸附水中氨氮的研究[J].环境科学与技术,2011,34(8):104-108. |
| 作者姓名： | 张健 万东锦 朱云云 康瑾 刘永德 王真真 |
| 作者单位： | 1. 郑州粮油食品工程建筑设计院,河南郑州,450052 2. 河南工业大学化学化工学院环境工程系,河南郑州,450001 3. 湖北省环境科学研究院,湖北武汉,430072 |
| 基金项目： | 河南工业大学博士基金(2009BS057) |
| 摘 要： | 考察了两种硅铝比分别为25及50的ZSM-5沸石分子筛对水中氨氮的吸附性能及影响因素.研究表明,25℃时,25H及50H型沸石的吸附平衡时间分别为10 min和35 min,吸附等温线均符合Langmuir经验模型,25 H型分子筛的饱和吸附容量较大,为7.83 mg/g,50H型分子筛为4.36 mg/g.当吸附剂投... |
| 关 键 词： | 沸石 硅铝比 吸附 氨氮 |
Adsorption of NH_4~+-N from Aqueous Solution by Two Kinds of ZSM-5 Molecular Sieve |
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| ZHANG Jian,WAN Dong-jin,ZHU Yun-yun,KANG Jin,LIU Yong-de,WANG Zhen-zhen.Adsorption of NH_4~+-N from Aqueous Solution by Two Kinds of ZSM-5 Molecular Sieve[J].Environmental Science and Technology,2011,34(8):104-108. | |
| Authors: | ZHANG Jian WAN Dong-jin ZHU Yun-yun KANG Jin LIU Yong-de WANG Zhen-zhen |
| Institution: | ZHANG Jian1,WAN Dong-jin2,ZHU Yun-yun2,KANG Jin3,LIU Yong-de2,WANG Zhen-zhen2(1.Zhengzhou Grain,Oil and Food Engineering Architecture Design Institute,Zhengzhou 450052,China,2.School of Chemistry and Chemical Engineering,Henan University of Technology,Zhengzhou 450001,3.Hubei Research Academy of Environmental Science,Wuhan 430072,China) |
| Abstract: | Adsorption of ammonia nitrogen from aqueous solution by two kinds of ZSM-5 molecular sieve was investigated.Results showed that the adsorption equilibration time of 25 H and 50 H was 10min and 35min respectively at 25 ℃.The adsorption equilibrium isotherm could be satisfactorily described with Langmuir model.25 H molecular sieve exhibited higher adsorption capacity and its maximum adsorption capacity was 7.83 mg/g,while the maximum adsorption capacity of 50 H was 4.36 mg/g.As the adsorbent dosage increased from 0.5 to 3.0 g/L,the removal rate of ammonia nitrogen increased from 11% to 60% correspondingly.Common cations could affect the adsorption process,with the corresponding sequence as Pb2+,K+,Na+ and Mg2+.Higher concentration of co-existing cation had greater influence on adsorption removal efficiency.IR analysis revealed that the characteristics band of 3 150 and 1 400 cm-1 of ammonia nitrogen appeared in the spectra of zeolites after adsorption. |
| Keywords: | zeolite SiO2 /Al2O3 ratio adsorption ammonia nitrogen |
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