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题名: Boron adsorption by composite magnetic particles
作者: 刘海宁 ;  卿彬菊 ;  叶秀深 ;  李权 ;  Lee, Kangtaek ;  吴志坚
刊名: CHEMICAL ENGINEERING JOURNAL
出版日期: 2009
卷号: 151, 期号:1-3, 页码:235-240
关键词: Boric acid ;  Composite magnetic particle ;  Adsorption ;  Electrostatic
语种: We prepared Fe(3)O(4) particles and two types of composite magnetic particles derived from Fe(3)O(4) and bis(trimethoxysilylpropyl)amine (TSPA), and from Fe(3)O(4) and a flocculating agent 1010f (a copolymer of acrylamide, sodium acrylate, and [2-(acryloyloxy)ethyl]trimethylammonium chloride). Using these particles, boron adsorption in aqueous solution was comprehensively investigated. The adsorption was found to occur rapidly in the first 2 h and the particle composition did not have a significant effect on the equilibrium time. We found that Fe(3)O(4)-TSPA particles presented the highest adsorption capacity, whereas the pure Fe(3)O(4) particles showed the lowest capacity. For all particles, amount of boron adsorption decreased with the initial pH in the order of 6.0 > 2.2 > 11.7. In general, the adsorption amount appeared to decrease with the increase in ionic strength. We propose that boron is adsorbed in the form of both H(3)BO(3) and B(OH)(4)(-) through the interactions of hydrogen bonding, electrostatic and hydrophobic attractions. The information gained in this study would be helpful for both understanding the adsorption mechanism and designing low-cost and easily available adsorbents for boron. (C) 2009 Elsevier B.V. All rights reserved. We prepared Fe(3)O(4) particles and two types of composite magnetic particles derived from Fe(3)O(4) and bis(trimethoxysilylpropyl)amine (TSPA), and from Fe(3)O(4) and a flocculating agent 1010f (a copolymer of acrylamide, sodium acrylate, and [2-(acryloyloxy)ethyl]trimethylammonium chloride). Using these particles, boron adsorption in aqueous solution was comprehensively investigated. The adsorption was found to occur rapidly in the first 2 h and the particle composition did not have a significant effect on the equilibrium time. We found that Fe(3)O(4)-TSPA particles presented the highest adsorption capacity, whereas the pure Fe(3)O(4) particles showed the lowest capacity. For all particles, amount of boron adsorption decreased with the initial pH in the order of 6.0 > 2.2 > 11.7. In general, the adsorption amount appeared to decrease with the increase in ionic strength. We propose that boron is adsorbed in the form of both H(3)BO(3) and B(OH)(4)(-) through the interactions of hydrogen bonding, electrostatic and hydrophobic attractions. The information gained in this study would be helpful for both understanding the adsorption mechanism and designing low-cost and easily available adsorbents for boron. (C) 2009 Elsevier B.V. All rights reserved.
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内容类型: 期刊论文
URI标识: http://ir.isl.ac.cn/handle/363002/2097
Appears in Collections:青海盐湖研究所知识仓储(2014年之前)_期刊论文

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Recommended Citation:
Liu, Haining,Qing, Binju,Ye, Xiushen,et al. Boron adsorption by composite magnetic particles[J]. CHEMICAL ENGINEERING JOURNAL,2009,151(1-3):235-240.
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