| 王灼英.烟秆与紫茎泽兰混合炭对氨氮的吸附效应[J].广东农业科学,2015,42(17):52-56 |
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烟秆与紫茎泽兰混合炭对氨氮的吸附效应 |
| Adsorption effect of ammonia nitrogen by carbonized tobacco stems and Eupatorium adenophorum Spreng |
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| DOI： |
| 中文关键词: 烟秆 紫茎泽兰 炭化 氨氮 动力学 |
| 英文关键词: tobacco stems Eupatorium adenophorum Spreng carbonization ammonia nitrogen dynamics |
| 基金项目:四川省教育厅重点项目（13ZA0158） |
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| 摘要点击次数: 1465 |
| 全文下载次数: 505 |
| 中文摘要: |
| 以烟秆和紫茎泽兰为试验材料， 混合炭化后制得吸附剂用于吸附废水中的氨氮。 通过对烟秆与紫
茎泽兰的混合比例、 炭化温度和炭化时间进行考察， 确定制备混合吸附剂的最佳工艺参数； 探究吸附剂投加
量、 吸附时间和溶液初始质量浓度对氨氮去除率的影响； 采用准一级动力学、 准二级动力学模型和颗粒内扩散
模型拟合试验数据。 结果表明： 在烟秆和紫茎泽兰混合配比 1∶1、 500℃炭化 30 min 条件下所制备的混合吸附
剂， 当溶液初始质量浓度为 20 mg/L 时， 氨氮的去除率可达 85.13%， 单位吸附量达 8.51 mg/g； 通过吸附动力学
分析发现， 准二级动力学模型能较好地符合水中氨氮的吸附过程， 相关系数在 0.9641~0.9771 之间。 |
| 英文摘要: |
| A novel low-cost adsorbent， carbonized tobacco stems and Eupatorium adenophorum Spreng， as a
solution to remove ammonia nitrogen from aqueous was reported. The ammonia nitrogen removal efficiency was taken as
an evaluation index for optimizing carbonized temperature， carbonized time and particle size of raw materials. Effects of
various regulation parameters， such as adsorbent dosage， initial concentration and vibration time were investigated. The
results showed that the optimal adsorbent was prepared at 500℃ for 30 min with mix ratio of 1∶1， which could remove
20 mg/L ammonia nitrogen from aqueous solution by 85.13%， the maximum adsorption capacity reached 8.51 mg/g.
Kinetics studies indicated that the adsorption process could be well described by the pseudo-second-order equation. The
correlation coefficient was 0.9641-0.9771. |
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