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Membrane Water Treatment
  Volume 8, Number 6, November 2017 , pages 575-590
DOI: https://doi.org/10.12989/mwt.2017.8.6.575
 


Cr (VI) separation by PolyHIPE membrane immobilized with Aliquat 336 by solvent-nonsolvent method
Jyh-Herng Chen, Le Thi Tuyet Mai and Kai-Chung Hsu

 
Abstract
    PolyHIPEs membrane prepared with styrene (St), divinylbenzene (DVB), and ethylhexyl acrylate (EHA) can yield a unique pore structure provided by large voids highly interconnected by many small window throats. With the advantageous pore structure, PolyHIPE presents a potential as a support for carrier facilitated transport membrane. Tricaprylmethylammonium chloride (Aliquat 336) can be efficiently incorporated into the PolyHIPE membrane by a two-step solvent-nonsolvent method to obtain an Aliquat 336-immobilized PolyHIPE membrane with good stability. The study of Cr (VI) transport through Aliquat 336-immobilized PolyHIPE membrane indicates that the membrane has high initial flux and maxima stripping flux (Jfo=15.01 (umol/m2s), Jsmax=6.15 (umol/m2s)). The reusability study shows that the Aliquat 336-immobilized PolyHIPE membrane can maintain high Cr(VI) recovery efficiency even after 15 cycles of operations. The developed membrane was also used in the separation of Cr (VI) from other anions (i.e., (SO4)2-and (NO3)-) and other cations (i.e., Ni (ll), Mg (ll) and Cu (ll)) with good selectivity.
 
Key Words
    polyHIPE membrane; Cr(VI) separation; solvent-nonsolvent method
 
Address
Jyh-Herng Chen : Department of Materials and Mineral Resources Engineering, National Taipei University of Technology,
1, Section 3, Chung-Hsiao East Road, Taipei, 10608, Taiwan, R.O.C.
Le Thi Tuyet Mai and Kai-Chung Hsu : College of Engineering, National Taipei University of Technology, 1, Section 3, Chung-Hsiao East Road, Taipei, 10608, Taiwan, R.O.C.
 

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