Separation of reactive dyes using PES/SPEEK blend nanofiltration membrane

The objectives of this research are to characterize and evaluate the performance of negatively charged nanofiltration (NF) flat sheet membrane for dyeing wastewater treatment. 20 wt% polyethersulfone (PES) was used to prepare the sheet due to its good structural integrity incorporation the standard...

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Main Author:	Halakoo, Elnaz
Format:	Thesis
Published:	2013
Subjects:	TP Chemical technology
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spelling	my-utm-ep.422042020-08-17T02:48:47Z Separation of reactive dyes using PES/SPEEK blend nanofiltration membrane 2013 Halakoo, Elnaz TP Chemical technology The objectives of this research are to characterize and evaluate the performance of negatively charged nanofiltration (NF) flat sheet membrane for dyeing wastewater treatment. 20 wt% polyethersulfone (PES) was used to prepare the sheet due to its good structural integrity incorporation the standard of permeability and rejection which are close to NF category. Negatively charged NF membranes with thickness of 150µm were successfully fabricated by blending with sulfonated poly (ether ether ketone) (SPEEK) in the range of 0-4 wt%. Prior to membrane fabrication, the synthesized SPEEK was characterized in terms of the degree of sulfonation (DS) using nuclear magnetic resonance (NMR) spectroscopy. The morphological structure of membrane was determined using scanning electron microscopy (SEM), atomic force microscopy (AFM) and their performances were examined in terms of flux and rejection. It was found that the blend membranes exhibited higher water flux and dye rejection in comparison to pure PES membrane. High water flux is due to increasing SPEEK content, implying that the improvement in the hydrophilicity which was confirmed by contact angle (CA) values. However, controlling the content SPEEK with high DS of 75% is necessary because the integrity of membrane tends to deteriorate at high SPEEK content, resulting in low dye rejection. In the dye separation test, almost complete rejection (>99.1%) of Reactive Black (RB5) and more than 91.4% rejection of Reactive Orange 16 (RO16) was achieved with the use of feed solution contains 200 ppm. The dye rejection was found to be dominated by sieving effect as NF membranes typically possess pore radius in sub-nanometer range, which is relatively smaller than the effective hydrodynamic radius of dye molecules. Hence, the membrane produced in this study is very promising to be used in the separation of dye from textile dyeing wastewater. 2013 Thesis http://eprints.utm.my/id/eprint/42204/ http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:81439 masters Universiti Teknologi Malaysia, Faculty of Chemical Engineering Faculty of Chemical Engineering
institution	Universiti Teknologi Malaysia
collection	UTM Institutional Repository
topic	TP Chemical technology
spellingShingle	TP Chemical technology Halakoo, Elnaz Separation of reactive dyes using PES/SPEEK blend nanofiltration membrane
description	The objectives of this research are to characterize and evaluate the performance of negatively charged nanofiltration (NF) flat sheet membrane for dyeing wastewater treatment. 20 wt% polyethersulfone (PES) was used to prepare the sheet due to its good structural integrity incorporation the standard of permeability and rejection which are close to NF category. Negatively charged NF membranes with thickness of 150µm were successfully fabricated by blending with sulfonated poly (ether ether ketone) (SPEEK) in the range of 0-4 wt%. Prior to membrane fabrication, the synthesized SPEEK was characterized in terms of the degree of sulfonation (DS) using nuclear magnetic resonance (NMR) spectroscopy. The morphological structure of membrane was determined using scanning electron microscopy (SEM), atomic force microscopy (AFM) and their performances were examined in terms of flux and rejection. It was found that the blend membranes exhibited higher water flux and dye rejection in comparison to pure PES membrane. High water flux is due to increasing SPEEK content, implying that the improvement in the hydrophilicity which was confirmed by contact angle (CA) values. However, controlling the content SPEEK with high DS of 75% is necessary because the integrity of membrane tends to deteriorate at high SPEEK content, resulting in low dye rejection. In the dye separation test, almost complete rejection (>99.1%) of Reactive Black (RB5) and more than 91.4% rejection of Reactive Orange 16 (RO16) was achieved with the use of feed solution contains 200 ppm. The dye rejection was found to be dominated by sieving effect as NF membranes typically possess pore radius in sub-nanometer range, which is relatively smaller than the effective hydrodynamic radius of dye molecules. Hence, the membrane produced in this study is very promising to be used in the separation of dye from textile dyeing wastewater.
format	Thesis
qualification_level	Master's degree
author	Halakoo, Elnaz
author_facet	Halakoo, Elnaz
author_sort	Halakoo, Elnaz
title	Separation of reactive dyes using PES/SPEEK blend nanofiltration membrane
title_short	Separation of reactive dyes using PES/SPEEK blend nanofiltration membrane
title_full	Separation of reactive dyes using PES/SPEEK blend nanofiltration membrane
title_fullStr	Separation of reactive dyes using PES/SPEEK blend nanofiltration membrane
title_full_unstemmed	Separation of reactive dyes using PES/SPEEK blend nanofiltration membrane
title_sort	separation of reactive dyes using pes/speek blend nanofiltration membrane
granting_institution	Universiti Teknologi Malaysia, Faculty of Chemical Engineering
granting_department	Faculty of Chemical Engineering
publishDate	2013
_version_	1747816715118444544

Separation of reactive dyes using PES/SPEEK blend nanofiltration membrane

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