| 超声场中活性炭上Zn2+的吸附/脱附 |
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| 引用本文： | 周兰娟,荆国华,周作明. 超声场中活性炭上Zn2+的吸附/脱附[J]. 中国环境科学, 2011, 31(5): 755-760 |
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| 作者姓名： | 周兰娟 荆国华 周作明 |
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| 作者单位： | 华侨大学化工学院,福建,厦门,361021 |
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| 基金项目： | 污染控制与资源化研究国家重点实验室开放基金 |
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| 摘 要： | 采用静态条件,考察了超声波对活性炭上Zn2+吸附/脱附性能的影响.结果表明,有/无超声作用下,活性炭对Zn2+的吸附率均随Zn2+初始浓度的增加而减少,该吸附过程属于优惠吸附, Langmuir模型能更好描述该过程,超声的引入对活性炭吸附Zn2+有一定抑制作用.脱附研究发现,在蒸馏水介质中,Zn2+脱附率仅为2.11%,加入超声后Zn2+的脱附率提高至20.8%,添加NaOH后脱附率明显增加,有/无超声作用下的脱附率分别为40.1%和33.1%.动力学分析表明,Zn2+在活性炭上的吸附/脱附均符合2级反应动力学.
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| 关 键 词： | Zn2+ 活性炭 超声波 吸附 脱附 |
| 收稿时间： | 2010-09-20; |
Effect of ultrasound on adsorption and desorption of Zn2+ on activated carbon |
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| ZHOU Lan-juan,JING Guo-hua,ZHOU Zuo-ming. Effect of ultrasound on adsorption and desorption of Zn2+ on activated carbon[J]. China Environmental Science, 2011, 31(5): 755-760 |
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| Authors: | ZHOU Lan-juan JING Guo-hua ZHOU Zuo-ming |
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| Affiliation: | ZHOU Lan-juan,JING Guo-hua,ZHOU Zuo-ming(College of Chemical Engineering,Huaqiao University,Xiamen 361021,China). |
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| Abstract: | Under static experimental conditions,the effect of ultrasound on the adsorption/desorption characteristics of Zn2+ on activated carbon was investigated.Whether ultrasound application was injected in or not,the adsorption ratio of Zn2+ decreased with the increase of initial Zn2+ concentration.The isothermal adsorption experiment showed that activated carbon adsorbing Zn2+ belonged to favorable adsorption and Langmuir model agreed better with experimental data than Freundlich's.Ultrasound inhibited the adsorp... |
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| Keywords: | zinc ions activated carbon ultrasound adsorption desorption |
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