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| 改性沸石吸附低浓度氨氮废水及其脱附的研究 | |
| 引用本文： | 唐登勇,郑正,郭照冰,林志荣,董超,王晓兰.改性沸石吸附低浓度氨氮废水及其脱附的研究[J].环境工程学报,2011,5(2):293-296. |
| 作者姓名： | 唐登勇 郑正 郭照冰 林志荣 董超 王晓兰 |
| 作者单位： | 1. 江苏省大气环境监测与污染控制高技术研究重点实验室,南京,210044;南京信息工程大学循环经济与清洁生产研究中心,南京,210044;南京信息工程大学环境科学与工程学院,南京,210044 2. 复旦大学环境科学与工程系,上海,200433 3. 南京信息工程大学环境科学与工程学院,南京,210044 |
| 基金项目： | 国家水体污染控制与治理科技重大专项“十一·五”太湖水专项资助(2008ZX07101-004) |
| 摘 要： | 采用氯化钠溶液对浙江某地天然沸石改性,以低浓度氨氮废水为处理对象,比较了天然沸石和改性沸石的吸附等温线、吸附动力学和动态吸附,并进行了改性沸石的动态脱附研究.结果表明,沸石的平衡吸附量随着平衡浓度的增大而增大;Freundlich方程比Langmuir方程更好地描述沸石吸附低浓度氨氮废水的行为,改性沸石比天然沸石具有更... |
| 关 键 词： | 改性沸石 氨氮 吸附 脱附 |
| 修稿时间： | 5/4/2010 12:00:00 AM |
Study on ammonianitrogen adsorption from low concentration wastewater by modified zeolite and its desorption |
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| Tang Dengyong,Zheng Zheng,Guo Zhaobing,Lin Zhirong,Dong Chao and Wang Xiaolan.Study on ammonianitrogen adsorption from low concentration wastewater by modified zeolite and its desorption[J].Techniques and Equipment for Environmental Pollution Control,2011,5(2):293-296. | |
| Authors: | Tang Dengyong Zheng Zheng Guo Zhaobing Lin Zhirong Dong Chao and Wang Xiaolan |
| Institution: | 1.Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, Nanjing 210044, China;2.Research Center of Cyclic Economy and Cleaner Production, Nanjing University of Information Science & Technology, Nanjing 210044, China;3. School,4. Department of Environmental Science & Engineering, Fudan University, Shanghai 200433, China,1.Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, Nanjing 210044, China;2.Research Center of Cyclic Economy and Cleaner Production, Nanjing University of Information Science & Technology, Nanjing 210044, China;3. School,1.Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, Nanjing 210044, China;2.Research Center of Cyclic Economy and Cleaner Production, Nanjing University of Information Science & Technology, Nanjing 210044, China;3. School,3. School of Environmental Science and Engineering, Nanjing University of Information Science & Technology,Nanjing 210044, China and 3. School of Environmental Science and Engineering, Nanjing University of Information Science & Technology,Nanjing 210044, China |
| Abstract: | Sodium chloride aqueous solution was used to modify the natural zeolite obtained from Zhejiang Province and the properties of low-concentration ammonia-nitrogen (NH3-N) adsorption from wastewater for the zeolites were studied. The adsorption isotherms, adsorption kinetics and dynamic adsorption adsorption were compared between the natural zeolite and the modified zeolite, and dynamic desorption of NH3-N from the modified zeolite was also conducted. The results showed that the equilibrium adsorption quantity increased with increasing equilibrium concentration and Freundlich equation was better to predict the experimental data than Langmuir equation. The modified zeolite had higher adsorption capacity than the natural zeolite. The adsorption kinetic data were fitted well by the pseudo second-order kinetic model. Forty-liter wastewater containing 20 mg/L NH3-N was effectively treated by the adsorption column with 105 g modified zeolite, which was 2.67 times that of the adsorption column with equal mass natural zeolite, and the concentration of NH3-N was less than 5 mg/L in the effluent. The desorption efficiency of NH3-N from the modified zeolite was to 95.2% using the mixture of NaCl and NaOH solution. |
| Keywords: | modified zeolite ammonia-nitrogen adsorption desorption |
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