Cover Image

Synthesis, characterization and performance assessment of thin film composite nanofiltration (TFC-NF) membranes for treating dyes wastewater

In this study, the influence of dipping times of aqueous phase, reaction times in organic phase, and curing times on the preparation of thin film composite nanofiltration (TFC-NF) membranes were examined. Membranes were interfacially polymerized of m-phenelyne diamine and trimesoyl chloride on ultra...

Full description

Saved in:
Bibliographic Details
Main Author: Norhidayah, Abdull
Format: Thesis
Language:English
Published: Fakulti Sains dan Teknologi 2011
Subjects:
TP 248.25 .M46 N6 2009
Norhidayah Abdull
Nanofiltration
Membrane separation
Online Access:http://hdl.handle.net/123456789/760
Tags: Add Tag
No Tags, Be the first to tag this record!
id my.umt.ir-760
record_format eprints
spelling my.umt.ir-7602016-03-11T19:33:02Z Synthesis, characterization and performance assessment of thin film composite nanofiltration (TFC-NF) membranes for treating dyes wastewater Norhidayah, Abdull TP 248.25 .M46 N6 2009 Norhidayah Abdull Nanofiltration Membrane separation In this study, the influence of dipping times of aqueous phase, reaction times in organic phase, and curing times on the preparation of thin film composite nanofiltration (TFC-NF) membranes were examined. Membranes were interfacially polymerized of m-phenelyne diamine and trimesoyl chloride on ultrafiltration membrane and then were characterized by means of permeability coefficient, charged solutes separation and membrane morphologies. All membranes characteristics are in the range of NF membrane. SEM micrographs show that most of the membranes have typical composite structure. The prepared membranes within 3 min dipping time (TFC-NF-D3), 30 sec reaction time (TFC-NF-R30) and curing time (TFC-NF-C15) reveal the superior charged solute separation with the trade off between permeate fluxes and rejections. These membranes were further investigated to obtain a general understanding of the possibility of membrane to separate the dye-based wastewater. Results indicate membranes have good quality of permeates (up to about 95%) and higher fluxes (1.957 to 17.977 m3/m2.s.bar) as well as to those observed with commercial membranes. Among the dominant obstacles of NF membrane process is the declination of flux over time. Therefore, the effect of dye concentration (100 mg/L, 200 mg/L, 300 mg/L and 400 mg/L) and dye - salt mixture concentration (0.1 g/L, 1.0 g/L and 10.0 g/L at fixed dye concentration of 100 mg/L) on the flux decline behavior of dye wastewater were examined. The membrane properties and the percentages of flux decline (total flux decline, irreversible and reversible fouling, and concentration polarization) were investigated to explain the flux decline behavior. The highest dye and dye -salt mixture concentration exposes that the most accelerates of flux decline, but the lowest flux recovery for all membranes. Fluxes were sharply decreased at the initial stage of filtration. It is believes that the flux decline behavior at this stage is controlled by the irreversible fouling (pore blockage and pore constriction mechanisms). When more dyes accumulated on the membrane surface, the flux decline mechanism transited to cake formation mechanism (reversible fouling). At this stage, a steady state was achieved. Thus, it is demonstrates that most of the filtration process was dominated by a reversible fouling. 2011-06-06T07:26:38Z 2011-06-06T07:26:38Z 2009-03 Thesis http://hdl.handle.net/123456789/760 en application/pdf application/pdf Fakulti Sains dan Teknologi
institution Universiti Malaysia Terengganu
building Perpustakaan Sultanah Nur Zahirah
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaysia Terengganu
content_source UMT-IR
url_provider http://umt-ir.umt.edu.my:8080/
language English
topic TP 248.25 .M46 N6 2009
Norhidayah Abdull
Nanofiltration
Membrane separation
spellingShingle TP 248.25 .M46 N6 2009
Norhidayah Abdull
Nanofiltration
Membrane separation
Norhidayah, Abdull
Synthesis, characterization and performance assessment of thin film composite nanofiltration (TFC-NF) membranes for treating dyes wastewater
description In this study, the influence of dipping times of aqueous phase, reaction times in organic phase, and curing times on the preparation of thin film composite nanofiltration (TFC-NF) membranes were examined. Membranes were interfacially polymerized of m-phenelyne diamine and trimesoyl chloride on ultrafiltration membrane and then were characterized by means of permeability coefficient, charged solutes separation and membrane morphologies. All membranes characteristics are in the range of NF membrane. SEM micrographs show that most of the membranes have typical composite structure. The prepared membranes within 3 min dipping time (TFC-NF-D3), 30 sec reaction time (TFC-NF-R30) and curing time (TFC-NF-C15) reveal the superior charged solute separation with the trade off between permeate fluxes and rejections. These membranes were further investigated to obtain a general understanding of the possibility of membrane to separate the dye-based wastewater. Results indicate membranes have good quality of permeates (up to about 95%) and higher fluxes (1.957 to 17.977 m3/m2.s.bar) as well as to those observed with commercial membranes. Among the dominant obstacles of NF membrane process is the declination of flux over time. Therefore, the effect of dye concentration (100 mg/L, 200 mg/L, 300 mg/L and 400 mg/L) and dye - salt mixture concentration (0.1 g/L, 1.0 g/L and 10.0 g/L at fixed dye concentration of 100 mg/L) on the flux decline behavior of dye wastewater were examined. The membrane properties and the percentages of flux decline (total flux decline, irreversible and reversible fouling, and concentration polarization) were investigated to explain the flux decline behavior. The highest dye and dye -salt mixture concentration exposes that the most accelerates of flux decline, but the lowest flux recovery for all membranes. Fluxes were sharply decreased at the initial stage of filtration. It is believes that the flux decline behavior at this stage is controlled by the irreversible fouling (pore blockage and pore constriction mechanisms). When more dyes accumulated on the membrane surface, the flux decline mechanism transited to cake formation mechanism (reversible fouling). At this stage, a steady state was achieved. Thus, it is demonstrates that most of the filtration process was dominated by a reversible fouling.
format Thesis
author Norhidayah, Abdull
author_facet Norhidayah, Abdull
author_sort Norhidayah, Abdull
title Synthesis, characterization and performance assessment of thin film composite nanofiltration (TFC-NF) membranes for treating dyes wastewater
title_short Synthesis, characterization and performance assessment of thin film composite nanofiltration (TFC-NF) membranes for treating dyes wastewater
title_full Synthesis, characterization and performance assessment of thin film composite nanofiltration (TFC-NF) membranes for treating dyes wastewater
title_fullStr Synthesis, characterization and performance assessment of thin film composite nanofiltration (TFC-NF) membranes for treating dyes wastewater
title_full_unstemmed Synthesis, characterization and performance assessment of thin film composite nanofiltration (TFC-NF) membranes for treating dyes wastewater
title_sort synthesis, characterization and performance assessment of thin film composite nanofiltration (tfc-nf) membranes for treating dyes wastewater
publisher Fakulti Sains dan Teknologi
publishDate 2011
url http://hdl.handle.net/123456789/760
_version_ 1738395637642166272
score 13.211869

Similar Items