Polyamidezeolitic Imidazolate Framework-8polysulfone Thin Film Nanocomposite Membrane For The Treatment Of Produced Water Via Forward Osmosis

Produced water treatment using forward osmosis (FO) membrane has faced challenges such as high volume of wastewater and poor membrane chemical stability against produced water. Hence, a polyamide/zeolitic imidazolate framework-8 (ZIF-8) thin film nanocomposite (TFN) membrane with improved water perm...

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Main Author:	Beh, Jyh Jiunn
Format:	Thesis
Language:	English
Published:	2019
Subjects:	T Technology TP Chemical Technology
Online Access:	http://eprints.usm.my/51185/1/Polyamidezeolitic%20Imidazolate%20Framework-8polysulfone%20Thin%20Film%20Nanocomposite%20Membrane%20For%20The%20Treatment%20Of%20Produced%20Water%20Via%20Forward%20Osmosis.pdf
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spelling	my-usm-ep.511852022-01-14T01:40:08Z Polyamidezeolitic Imidazolate Framework-8polysulfone Thin Film Nanocomposite Membrane For The Treatment Of Produced Water Via Forward Osmosis 2019-05-01 Beh, Jyh Jiunn T Technology TP Chemical Technology Produced water treatment using forward osmosis (FO) membrane has faced challenges such as high volume of wastewater and poor membrane chemical stability against produced water. Hence, a polyamide/zeolitic imidazolate framework-8 (ZIF-8) thin film nanocomposite (TFN) membrane with improved water permeability and chemical stability was developed in this work. Nanosized ZIF-8 particles with unimodal size distribution were successfully synthesized at low reaction temperature (5 °C) by using high zinc ion (0.20 M) and 2-methylimidazole (1.60 M) concentrations. Poly(sodium 4-styrenesulfonate) (PSS) coating was found to stabilize the ZIF-8 particles against dissolution in water, which enabled them to be dosed in via aqueous phase during interfacial polymerization. Concurrently, a thin film composite (TFC) membrane with high NaCl selectivity was synthesized by forming polyamide film above a polysulfone (PSf) support membrane via interfacial polymerization. The polyamide film prepared at 3 w/v% m-phenylenediamine concentration, 0.10 w/v% trimesoyl chloride concentration and 60 s reaction duration was thin and dense. It achieved high NaCl selectivity of 0.673 bar-1 as characterized via reverse osmosis filtration test. This TFC membrane was further refined by adjusting PSf/ polyvinylpyrrolidone (PVP) ratio and using co-solvent in preparing the polymer dope to improve support membrane surface wettability and polyamide film formation above it. The support membrane prepared at PSf/PVP ratio of 0.941 without co-solvent had a surface with good wettability, regular pore size and moderate roughness (52.9 nm). This improved the TFC membrane NaCl selectivity to 0.691 bar-1 compared to that prepared on PSf support membrane without polymer dope modification. The support and reaction conditions of this TFC membrane were combined with the PSS-coated ZIF-8 particles to develop the TFN membrane. The pure water permeability of TFN membrane synthesized with triethylamine (TEA) (2.506 L/m2∙h∙bar) improved significantly over that of both TFC membrane (1.110 L/m2∙h∙bar) and TFN membrane synthesized without TEA (1.159 L/m2∙h∙bar). The enhanced water transport of TFN membrane was further manifested by its higher water flux relative to TFC membrane in filtering both synthetic and real produced water with oil concentration of 500 and 377.8 ppm respectively using FO process. Moreover, due to the chemically stable ZIF-8 particles against hydrocarbons, the TFN membrane demonstrated improved swelling resistance and chemical stability against produced water than the TFC membrane. In conclusion, this work successfully developed a polyamide/ZIF-8 TFN membrane with high water permeability, good chemical stability against produced water and high oil rejection of more than 99 % for produced water treatment using FO process. 2019-05 Thesis http://eprints.usm.my/51185/ http://eprints.usm.my/51185/1/Polyamidezeolitic%20Imidazolate%20Framework-8polysulfone%20Thin%20Film%20Nanocomposite%20Membrane%20For%20The%20Treatment%20Of%20Produced%20Water%20Via%20Forward%20Osmosis.pdf application/pdf en public phd doctoral Universiti Sains Malaysia Pusat Pengajian Kejuruteraan Kimia
institution	Universiti Sains Malaysia
collection	USM Institutional Repository
language	English
topic	T Technology TP Chemical Technology
spellingShingle	T Technology TP Chemical Technology Beh, Jyh Jiunn Polyamidezeolitic Imidazolate Framework-8polysulfone Thin Film Nanocomposite Membrane For The Treatment Of Produced Water Via Forward Osmosis
description	Produced water treatment using forward osmosis (FO) membrane has faced challenges such as high volume of wastewater and poor membrane chemical stability against produced water. Hence, a polyamide/zeolitic imidazolate framework-8 (ZIF-8) thin film nanocomposite (TFN) membrane with improved water permeability and chemical stability was developed in this work. Nanosized ZIF-8 particles with unimodal size distribution were successfully synthesized at low reaction temperature (5 °C) by using high zinc ion (0.20 M) and 2-methylimidazole (1.60 M) concentrations. Poly(sodium 4-styrenesulfonate) (PSS) coating was found to stabilize the ZIF-8 particles against dissolution in water, which enabled them to be dosed in via aqueous phase during interfacial polymerization. Concurrently, a thin film composite (TFC) membrane with high NaCl selectivity was synthesized by forming polyamide film above a polysulfone (PSf) support membrane via interfacial polymerization. The polyamide film prepared at 3 w/v% m-phenylenediamine concentration, 0.10 w/v% trimesoyl chloride concentration and 60 s reaction duration was thin and dense. It achieved high NaCl selectivity of 0.673 bar-1 as characterized via reverse osmosis filtration test. This TFC membrane was further refined by adjusting PSf/ polyvinylpyrrolidone (PVP) ratio and using co-solvent in preparing the polymer dope to improve support membrane surface wettability and polyamide film formation above it. The support membrane prepared at PSf/PVP ratio of 0.941 without co-solvent had a surface with good wettability, regular pore size and moderate roughness (52.9 nm). This improved the TFC membrane NaCl selectivity to 0.691 bar-1 compared to that prepared on PSf support membrane without polymer dope modification. The support and reaction conditions of this TFC membrane were combined with the PSS-coated ZIF-8 particles to develop the TFN membrane. The pure water permeability of TFN membrane synthesized with triethylamine (TEA) (2.506 L/m2∙h∙bar) improved significantly over that of both TFC membrane (1.110 L/m2∙h∙bar) and TFN membrane synthesized without TEA (1.159 L/m2∙h∙bar). The enhanced water transport of TFN membrane was further manifested by its higher water flux relative to TFC membrane in filtering both synthetic and real produced water with oil concentration of 500 and 377.8 ppm respectively using FO process. Moreover, due to the chemically stable ZIF-8 particles against hydrocarbons, the TFN membrane demonstrated improved swelling resistance and chemical stability against produced water than the TFC membrane. In conclusion, this work successfully developed a polyamide/ZIF-8 TFN membrane with high water permeability, good chemical stability against produced water and high oil rejection of more than 99 % for produced water treatment using FO process.
format	Thesis
qualification_name	Doctor of Philosophy (PhD.)
qualification_level	Doctorate
author	Beh, Jyh Jiunn
author_facet	Beh, Jyh Jiunn
author_sort	Beh, Jyh Jiunn
title	Polyamidezeolitic Imidazolate Framework-8polysulfone Thin Film Nanocomposite Membrane For The Treatment Of Produced Water Via Forward Osmosis
title_short	Polyamidezeolitic Imidazolate Framework-8polysulfone Thin Film Nanocomposite Membrane For The Treatment Of Produced Water Via Forward Osmosis
title_full	Polyamidezeolitic Imidazolate Framework-8polysulfone Thin Film Nanocomposite Membrane For The Treatment Of Produced Water Via Forward Osmosis
title_fullStr	Polyamidezeolitic Imidazolate Framework-8polysulfone Thin Film Nanocomposite Membrane For The Treatment Of Produced Water Via Forward Osmosis
title_full_unstemmed	Polyamidezeolitic Imidazolate Framework-8polysulfone Thin Film Nanocomposite Membrane For The Treatment Of Produced Water Via Forward Osmosis
title_sort	polyamidezeolitic imidazolate framework-8polysulfone thin film nanocomposite membrane for the treatment of produced water via forward osmosis
granting_institution	Universiti Sains Malaysia
granting_department	Pusat Pengajian Kejuruteraan Kimia
publishDate	2019
url	http://eprints.usm.my/51185/1/Polyamidezeolitic%20Imidazolate%20Framework-8polysulfone%20Thin%20Film%20Nanocomposite%20Membrane%20For%20The%20Treatment%20Of%20Produced%20Water%20Via%20Forward%20Osmosis.pdf
_version_	1747822063328952320

Polyamidezeolitic Imidazolate Framework-8polysulfone Thin Film Nanocomposite Membrane For The Treatment Of Produced Water Via Forward Osmosis

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