| 重金属离子天然吸附剂的解吸与再生 |
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| 引用本文： | 黄美荣,李舒.重金属离子天然吸附剂的解吸与再生[J].化工环保,2009,29(5). |
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| 作者姓名： | 黄美荣 李舒 |
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| 作者单位： | 同济大学,材料科学与工程学院先进土木工程材料教育部重点实验室,上海,200092 |
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| 基金项目： | 国家自然科学基金资助项目 |
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| 摘 要： | 总结了重金属离子的天然吸附剂的解吸与再生的研究进展.着重论述了各类解吸剂的解吸原理、解吸特点和解吸性能.指出无机酸解吸剂是价廉高效的理想解吸剂,其中盐酸可在低浓度下达到较高的解吸率,且对吸附剂性能没有损害,而强碱溶液是以阴离子基团形式存在的Cr~(6+)的专有解吸剂.在解吸过程中采用超声波或微波有助于提高解吸率.多数天然吸附剂都具有良好的再生能力,经5次吸附-解吸循环操作仍能保持原有的吸附性能.
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| 关 键 词： | 重金属离子 吸附剂 解吸 再生 |
Desorption and Regeneration of Natural Adsorbents for Heavy Metal Ions |
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| Huang Meirong,Li Shu.Desorption and Regeneration of Natural Adsorbents for Heavy Metal Ions[J].Environmental Protection of Chemical Industry,2009,29(5). |
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| Authors: | Huang Meirong Li Shu |
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| Institution: | Huang Meirong,Li Shu (Key Laboratory of Advanced Civil Engineering Materials of the Ministry of Education,College of Material Science and Engineering,Tongji University,Shanghai 200092,China) |
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| Abstract: | The research progresses in desorption and regeneration of natural adsorbents for heavy metal ions are summarized systematically. The desorption mechanism, desorption characteristics and desorption capability of each kind of desorption agents are emphasized. It is pointed out that inorganic acids are the ideal desorption agents with high efficiency and low cost. Among them, hydrochloric acid with low concentration can reach a higher desorption efficiency with less damage to natural adsorbents, while some alkaline solutions are the particular desorption agents for Cr~(6+) in anionic groups. The desorption efficiency can be enhanced with the aid of ultrasonic wave or microwave. Most of natural adsorbents have good regeneration abilities and most of their original adsorption capacities can remain after 5 times of adsorption-desorption. |
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| Keywords: | heavy metal ion adsorbent desorption regeneration |
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