Removal of low concentration Cr(VI) from aqueous solution by magnetic-fluids fixed bed using the high gradient magnetic separation.
Removal of low concentration Cr(VI) from aqueous solution by magnetic-fluids fixed bed using the high gradient magnetic separation.
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DOI：
10.1016/j.jcis.2012.02.001
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发表时间：
2012-05
影响因子：
9.9
通讯作者：
Qiang Wang;Y. Guan;Xiufeng Ren;Mingzhu Yang;X. Liu
中科院分区：
文献类型：
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作者：
Qiang Wang;Y. Guan;Xiufeng Ren;Mingzhu Yang;X. Liu
本文的重点是一个新的模型的Cr（VI）的提取过程。用高梯度磁分离理论（HGMS）解释了连接溶剂萃取和固定床萃取的“磁流体固定床”（MFFB）。MFFB结合了上述两种经典提取方法的优点，克服了它们的缺点。通过对水溶液中Cr（VI）的萃取实验，研究了该方法的可行性。考察了磁分离柱中铁磁性钢丝的设计、料液pH值、磁流体中TBP浓度、柱内水溶液流速等因素对磁分离效果的影响。在最佳工艺条件下，该方法连续提取，提取效率高。
The focus of this paper was a novel model of Cr(VI) extraction process. The original so-called “magnetic-fluids fixed bed” (MFFB), which bridged the solvent extraction and the fixed-bed extraction by the theory of the high gradient magnetic separation (HGMS), has been explained. The MFFB integrated the advantages of the two above mentioned classical extraction methods and overcame their drawbacks. The feasibility of this method was studied by extraction experiments of Cr(VI) from aqueous solution. The influences of the design of ferromagnetic steel wires in magnetic separation column, the pH value of feed solution, TBP concentration in magnetic fluids, and flow rate of aqueous solution in column were investigated. Under the optimum conditions, the proposed method obtained high extraction efficiency with continuous process.