Micellar-enhanced ultrafiltration of zinc in synthetic wastewater using spiral-wound membrane

In the present study, micellar-enhanced ultrafiltration (MEUF) was used to remove Zn2+ from synthetic wastewater by the spiral-wound ultrafiltration membrane. The effects of different operating conditions on the separation performance of membrane were investigated. It was found that the transmembran...

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Bibliographic Details
Published in:Journal of hazardous materials 2010-12, Vol.184 (1-3), p.261-267
Main Authors: Rahmanian, B., Pakizeh, M., Maskooki, A.
Format: Article
Language:English
Subjects:
Applied sciences
Chemical engineering
Coefficients
Exact sciences and technology
Flux
General purification processes
Hydrogen-Ion Concentration
Membrane separation (reverse osmosis, dialysis...)
Membranes
MEUF
Micelle
Micelles
Permeate flux
Pollution
Rejection
Rejection factor
Spiral-wound
Surfactants
Ultrafiltration
Ultrafiltration - methods
Waste water
Wastewaters
Water Pollutants, Chemical - isolation & purification
Water treatment and pollution
Zinc
Zinc - isolation & purification
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Summary:In the present study, micellar-enhanced ultrafiltration (MEUF) was used to remove Zn2+ from synthetic wastewater by the spiral-wound ultrafiltration membrane. The effects of different operating conditions on the separation performance of membrane were investigated. It was found that the transmembrane pressure has the largest influence on the permeate flux, but it has negligible effect on the rejection coefficient. Furthermore, sodium dodecyl sulfate (SDS) feed concentrations, SDS–Brij35 mixed micelles concentration and solution pH have a major influence on the rejection coefficient and negative effect on the permeate flux due to concentration polarization layer formation. Also, the results showed that the permeate flux and removal efficiency of zinc by anionic surfactant (SDS)–MEUF depends on the ligand-to-Zn2+ ratio extremely. In general, MEUF by spiral-wound ultrafiltration membrane has good rejection of Zn2+under different operating conditions, as the rejections were higher than 98.0%. However, application of single anionic surfactant at relatively low concentration is more efficient than mixed surfactants and MEUF was not practical when the wastewater is intensively acidic.
ISSN:0304-3894
1873-3336
DOI:10.1016/j.jhazmat.2010.08.031