Application of Polyelectrolyte-Enhanced Ultrafiltration for Rhenium Recovery from Aqueous Solutions
Polyelectrolyte‐enhanced ultrafiltration was investigated for rhenium(VII) recovery from aqueous solutions by using polyquaternium‐6 (PQ6) as a complexing agent. The effects of the operating parameters on the permeate flux (J) and the rhenium rejection coefficient (R) were studied. In the process of...
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Published in | Chemical engineering & technology Vol. 35; no. 2; pp. 387 - 392 |
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Main Authors | , , , |
Format | Journal Article |
Language | English |
Published |
Weinheim
WILEY-VCH Verlag
01.02.2012
WILEY‐VCH Verlag Wiley-VCH |
Subjects | |
Online Access | Get full text |
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Summary: | Polyelectrolyte‐enhanced ultrafiltration was investigated for rhenium(VII) recovery from aqueous solutions by using polyquaternium‐6 (PQ6) as a complexing agent. The effects of the operating parameters on the permeate flux (J) and the rhenium rejection coefficient (R) were studied. In the process of concentration, J declines slowly and R is about 1. The concentrated solution was used for the decomplexation. It takes 10 min to achieve the decomplexation equilibrium at a chloride ion concentration of 100 mg L–1. The decomplexation percentage reaches 45.6 %. In the diafiltration process, rhenium is extracted effectively, and the purification of the regenerated PQ6 is satisfactory. The regenerated PQ6 was used to bind rhenium(VII). The binding capacity of the regenerated PQ6 is close to that of fresh PQ6.
Polyelectrolyte‐enhanced ultrafiltration was originally used to achieve the recovery of rhenium from aqueous solutions with the help of polyquaternium‐6. The effects of various operating parameters on the permeate flux and the rhenium rejection coefficient were investigated. The integration of four experiments including concentration, decomplexation, diafiltration and reuse of the regenerated polymer was carried out. |
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Bibliography: | ark:/67375/WNG-M16F8J7J-X ArticleID:CEAT201100454 National Natural Science Foundation of China - No. 20976040 istex:BDF4E11ECA1BB4250F921558BE38CB951801B644 Science and Technology Planning Project of Hunan Province - No. 2009SK3036 |
ISSN: | 0930-7516 1521-4125 |
DOI: | 10.1002/ceat.201100454 |