| 壳聚糖包覆介孔微孔分子筛去除水中的氨氮 |
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| 引用本文： | 郭祎阁, 赵颖, 郭宇杰, 李晓光, 彭星, 李曹乐, 刘文芳. 壳聚糖包覆介孔微孔分子筛去除水中的氨氮[J]. 环境工程学报, 2015, 9(5): 2067-2072. doi: 10.12030/j.cjee.20150506 |
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| 作者姓名： | 郭祎阁 赵颖 郭宇杰 李晓光 彭星 李曹乐 刘文芳 |
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| 作者单位： | 1. 华北水利水电大学水利学院, 郑州 450045; 2. 中国环境科学研究院环境风险与基准评估国家重点实验室, 北京 100012; 3. 广东省浩蓝环保水污染治理院士工作站, 广州 510630 |
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| 基金项目： | "十二五"国家科技支撑计划项目(2012BAJ21B04) 国家自然科学基金青年基金资助项目(51108436) |
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| 摘 要： | 以壳聚糖包覆介孔-微孔复合分子筛(CS/MCM-41-A)为吸附剂去除水中的氨氮,研究了反应时间、溶液pH、溶液氨氮初始浓度、CS/MCM-41-A投加量、竞争离子对吸附的影响,分析了CS/MCM-41-A的吸附动力学和热力学特征。结果表明,298 K下,当CS/MCM-41-A投加量为5 g/L,溶液氨氮初始浓度50 mg/L,pH为7,吸附时间为40 min时,溶液中氨氮的去除率达到74.35%,CS/MCM-41-A对离子的选择吸附顺序为Mg2+>K+>Ca2+>Na+。CS/MCM-41-A吸附氨氮符合拟二级动力学方程,吸附等温线更好地符合Freundlich方程,CS/MCM-41-A对氨氮的去除有良好的吸附性能。
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| 关 键 词： | 复合分子筛 壳聚糖 氨氮 吸附 |
| 收稿时间： | 2014-12-18 |
Removal of ammonia-nitrogen in wastewater by chitosan-coated micro-mesoporous zeolite |
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| Guo Yige, Zhao Ying, Guo Yujie, Li Xiaoguang, Peng Xing, Li Caole, Liu Wenfang. Removal of ammonia-nitrogen in wastewater by chitosan-coated micro-mesoporous zeolite[J]. Chinese Journal of Environmental Engineering, 2015, 9(5): 2067-2072. doi: 10.12030/j.cjee.20150506 |
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| Authors: | Guo Yige Zhao Ying Guo Yujie Li Xiaoguang Peng Xing Li Caole Liu Wenfang |
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| Affiliation: | 1. School of Water Conservancy, North China University of Water Resources and Electric Power, Zhengzhou 450045, China; 2. State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China; 3. CNHOMELAND Environmental Protection Water Pollution Governance Academician Workstation, Guangzhou 510630, China |
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| Abstract: | Chitosan-coated meso-microporous zeolite CS/MCM-41-A was used to remove ammonia-nitrogen from water. The influences of several important parameters on ammonium removal, such as the mass ratio of adsorbent dosage, contact time, pH value, initial ammonium concentration, competition ions were investigated. The kinetic and thermodynamic models were also analyzed. The results indicated that, under the condition of 298 K, when the dosage was 5 g/L, the initial ammonia concentration was 50 mg/L, the pH was 7, and the reaction time lasted 40 min, the removal rate of ammonia nitrogen was 74.35%. The selectivity order over ammonium of other cations on CS/MCM-41-A was Mg2+> K+> Ca2+> Na+. The second-order kinetic model provided excellent kinetic data fitting. Freundlich model agreed more with experimental data. This proves that CS/MCM-41-A will be a good kind of potential materials of adsorption for ammonia nitrogen removal. |
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| Keywords: | meso-microporous zeolite chitosan ammonia adsorption |
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