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| 改性沸石对低浓度氨氮废水的动态吸附 | |
| 引用本文： | 贾小宁,王耀龙,周林成,李彦锋.改性沸石对低浓度氨氮废水的动态吸附[J].环境工程学报,2013,7(2):557-562. |
| 作者姓名： | 贾小宁 王耀龙 周林成 李彦锋 |
| 作者单位： | 1. 兰州大学资源环境学院,兰州,730000 2. 兰州大学化学化工学院,生物化工及环境技术研究所,兰州730000 3. 兰州大学资源环境学院,兰州730000;兰州大学化学化工学院,生物化工及环境技术研究所,兰州730000 |
| 基金项目： | 国家水体污染控制与治理科技重大专项(2009ZX07212-001-04);甘肃省科技攻关计划项目(2GS064-A52-036-02) |
| 摘 要： | 采用氯化钠溶液对甘肃白银天然沸石改性,以低浓度氨氮(NH4+-N)废水为处理对象,对比了天然沸石和改性沸石的动态吸附特性并绘制穿透曲线,利用Origin软件对实验数据分析处理,得出穿透曲线的通式。结果表明:在相同条件下,改性沸石的穿透时间和吸附饱和时间都比天然沸石的长约1.5倍;沸石经氯化钠改性后,对NH4+-N的吸附速率和饱和吸附量都明显提高,吸附性能显著改善。Origin软件对水溶液中NH4+-N的吸附穿透曲线的Logistic模型回归式具有较高的精度,该模型可以很好地反映沸石吸附剂的动态吸附过程。 |
| 关 键 词： | 天然沸石 改性 氨氮 动态吸附 |
Ammonia nitrogen dynamic adsorption from low concentration wastewater by modified zeolite |
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| Jia Xiaoning,Wang Yaolong,Zhou Lincheng and Li Yanfeng.Ammonia nitrogen dynamic adsorption from low concentration wastewater by modified zeolite[J].Techniques and Equipment for Environmental Pollution Control,2013,7(2):557-562. | |
| Authors: | Jia Xiaoning Wang Yaolong Zhou Lincheng and Li Yanfeng |
| Institution: | 1. College of Resources and Environment, Lanzhou University, Lanzhou 730000, China;1. College of Resources and Environment, Lanzhou University, Lanzhou 730000, China;2. Institute of Biochemical Engineering & Environmental Technology, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China;1. College of Resources and Environment, Lanzhou University, Lanzhou 730000, China;2. Institute of Biochemical Engineering & Environmental Technology, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China |
| Abstract: | Sodium chloride aqueous solution was used to modify the natural zeolite obtained from Gansu Province. The properties of low concentration ammonia nitrogen(NH4+-N)dynamic adsorption from wastewater by the natural and modified zeolites were studied. Breakthrough curve was drawed and the experimental data were dealt by Origin software to get the model of breakthrough curve equation. The results showed that under the same conditions, the penetration and saturation time of modified zeolite column was about 1.5 times longer than that of natural zeolite column. The adsorption rate and adsorption capacity of modified zeolite by sodium chloride were significantly improved. It indicated that Logistic model was fit for the dynamic adsorption of NH4+-N on the zeolite by linear correlative coefficient of breakthrough curve. |
| Keywords: | natural zeolite modification ammonia nitrogen dynamic adsorption |
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