| 4A沸石分子筛处理中低浓度氨氮废水 |
| |
| 引用本文： | 桂花,谭伟,李彬,白梅,杨敏,王红斌.4A沸石分子筛处理中低浓度氨氮废水[J].环境工程学报,2014,8(5):1944-1950. |
| |
| 作者姓名： | 桂花 谭伟 李彬 白梅 杨敏 王红斌 |
| |
| 作者单位： | 云南民族大学民族药资源化学国家民委-教育部重点实验室, 化学与生物技术学院, 昆明 650500;云南民族大学民族药资源化学国家民委-教育部重点实验室, 化学与生物技术学院, 昆明 650500;云南民族大学民族药资源化学国家民委-教育部重点实验室, 化学与生物技术学院, 昆明 650500;云南民族大学民族药资源化学国家民委-教育部重点实验室, 化学与生物技术学院, 昆明 650500;云南民族大学民族药资源化学国家民委-教育部重点实验室, 化学与生物技术学院, 昆明 650500;云南民族大学民族药资源化学国家民委-教育部重点实验室, 化学与生物技术学院, 昆明 650500 |
| |
| 基金项目： | 云南民族大学绿色化学与功能材料研究省创新团队项目（2011HC008）；云南省高校绿色化学新能源与材料科技创新团队项目（2011UY09）；云南民族大学化学与生物技术学院2011年学习型党支部创新性实验项目（2011HXDZB02） |
| |
| 摘 要： | 利用天然沸石、采用水热合成法制备4A沸石分子筛,用XRD和SEM进行了表征。通过考察吸附剂用量、pH、共存金属阳离子、吸附时间、氨氮废水初始浓度、温度对吸附性能的影响,结合动力学方程、吸附等温线、热力学函数等研究了吸附性能和机理。结果表明,当4 g/L的4A沸石分子筛在废水pH值为4~8的条件下对中低浓度氨氮吸附120min后,去除率可达88%;废水中共存单一金属阳离子(Pb2+、Cu2+、Ca2+和Mg2+)浓度大于100 mg/L时,对中低浓度的NH+4有强烈的竞争吸附;氨氮的吸附过程较好地符合准二级动力学方程、Freundlich模型,是一种混乱度增加、自发的放热过程。
|
| 关 键 词： | 云南沸石 A沸石分子筛 制备 氨氮 吸附 |
Removal ammonia-nitrogen from medium-low concentration wastewater by 4A zeolite molecular sieve |
| |
| Gui Hu,Tan Wei,Li Bin,Bai Mei,Yang Min and Wang Hongbin.Removal ammonia-nitrogen from medium-low concentration wastewater by 4A zeolite molecular sieve[J].Techniques and Equipment for Environmental Pollution Control,2014,8(5):1944-1950. |
| |
| Authors: | Gui Hu Tan Wei Li Bin Bai Mei Yang Min and Wang Hongbin |
| |
| Institution: | Key Laboratory of Ethnic Medicine Resource Chemistry, State Ethnic Affairs Commission & Ministry of Education, School of Chemistry and Biotechnology, Yunnan University of Nationalities, Kunming 650500, China;Key Laboratory of Ethnic Medicine Resource Chemistry, State Ethnic Affairs Commission & Ministry of Education, School of Chemistry and Biotechnology, Yunnan University of Nationalities, Kunming 650500, China;Key Laboratory of Ethnic Medicine Resource Chemistry, State Ethnic Affairs Commission & Ministry of Education, School of Chemistry and Biotechnology, Yunnan University of Nationalities, Kunming 650500, China;Key Laboratory of Ethnic Medicine Resource Chemistry, State Ethnic Affairs Commission & Ministry of Education, School of Chemistry and Biotechnology, Yunnan University of Nationalities, Kunming 650500, China;Key Laboratory of Ethnic Medicine Resource Chemistry, State Ethnic Affairs Commission & Ministry of Education, School of Chemistry and Biotechnology, Yunnan University of Nationalities, Kunming 650500, China;Key Laboratory of Ethnic Medicine Resource Chemistry, State Ethnic Affairs Commission & Ministry of Education, School of Chemistry and Biotechnology, Yunnan University of Nationalities, Kunming 650500, China |
| |
| Abstract: | 4A zeolite molecular sieve was synthesized from natural zeolite by hydrothermal synthesis. The means of XRD and SEM were used to characterize the product. The effects of adsorbent dosage, pH of solution, coexistence metal cations, adsorption time, initial concentration and temperature on adsorption performance, the dynamics equation, adsorption isotherm, and thermodynamic functions were discussed in the research. The results showed that 4 g/L of adsorbent removed to medium-low ammonia nitrogen that pH at 4~8 after 120 min removal efficiency can reach at 88%. In addition, it was strongly competed with NH4+ that single metal cation (Pb2+, Cu2+, Ca2+, Mg2+) concentration was greater than 100 mg/L. Ammonia-nitrogen adsorption process well accords with quasi second-order dynamics equation and Freundlich model, it is chaotic, spontaneous and exothermic. |
| |
| Keywords: | Yunnan zeolite 4A zeolite molecular sieve preparation ammonia-nitrogen adsorption |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《环境工程学报》浏览原始摘要信息 |
| 点击此处可从《环境工程学报》下载免费的PDF全文 |
|
