Study of foulants quantification of protein-based ultrafiltration using chitosan/silver nanoparticles polyethersulfone membranes

Fouling limits the process performance in membrane technology applications. Biofouling, on the other hand, is the major contributing factor in membrane fouling phenomena. When dealing with protein-based solutes, it is essential to control biofouling occurrence caused by bacterial growth on the membr...

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Main Author:	Nur Mahirah Chik@Ismail
Format:	Thesis
Language:	English
Online Access:	http://umt-ir.umt.edu.my:8080/jspui/bitstream/123456789/17577/1/Abstract%20TP%20248.25%20.M45%20N8%202022.pdf http://umt-ir.umt.edu.my:8080/jspui/bitstream/123456789/17577/2/Full%20thesis%20TP%20248.25%20.M45%20N8%202022.pdf
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spelling	my-umt-ir.-175772022-12-21T04:09:02Z Study of foulants quantification of protein-based ultrafiltration using chitosan/silver nanoparticles polyethersulfone membranes Nur Mahirah Chik@Ismail Fouling limits the process performance in membrane technology applications. Biofouling, on the other hand, is the major contributing factor in membrane fouling phenomena. When dealing with protein-based solutes, it is essential to control biofouling occurrence caused by bacterial growth on the membrane surfaces and in pores. AgNP is able to inhibit bacteria growth and improve the permeability of polymeric membrane while chitosan can improve membrane hydrophilicity and possess antibacterial properties. Thus, silver nanoparticles (AgNP) and chitosan were chosen as bacteria inhibitors due to their remarkable antibacterial properties. This study was carried out to determine the effect of AgNP, chitosan, and a combination of both on fouling occurrence during protein-based ultrafiltration. These experiments were conducted by using the native Polyethersulfone (PES) membrane in comparison with the PES-Ag membrane, PES-Chitosan membrane, and PES-Ag-Chitosan membrane at a controlled condition where 150ppm bovine serum albumin (BSA) was applied as a model protein. A resistance-in-series model was adopted to determine the magnitude of four major resistances that govern fouling mechanisms namely membrane (Rm), adsorption (Ra), pore plugging (Rg), and cake formation (Rc) resistances to obtain better insights into fouling occurrences. The resistances magnitude was significantly reduced and arranged in a sequence of Rg>Rm>Ra>Rc for the PES-Ag-Chitosan membrane. Foulant weight was significantly reduced by 56% for the PES-Ag-Chitosan membrane as compared to PES-Chitosan and PES-Ag membranes which marked a reduction of 53% and 50% respectively using iv Thermogravimetric analysis (TGA) analysis. Based on the fouling quantification analysed and resistance-in-series computed for BSA ultrafiltration in dead-end configuration, it was proposed that the modification of PES membrane by incorporating AgNP and surface modification via Chitosan simultaneously is favourable to be implemented to mitigate biofouling. It indicates that AgNP and chitosan have a synergistic effect in overcoming the fouling contributed by both - solutes depositions and bacterial growth. Universiti Malaysia Terengganu 2022 Thesis en http://umt-ir.umt.edu.my:8080/handle/123456789/17577 http://umt-ir.umt.edu.my:8080/jspui/bitstream/123456789/17577/1/Abstract%20TP%20248.25%20.M45%20N8%202022.pdf 35822c250b11bf5f258364410d3e391f http://umt-ir.umt.edu.my:8080/jspui/bitstream/123456789/17577/2/Full%20thesis%20TP%20248.25%20.M45%20N8%202022.pdf 4f091139d46695b411580735507d14c2 http://umt-ir.umt.edu.my:8080/jspui/bitstream/123456789/17577/3/license.txt 8a4605be74aa9ea9d79846c1fba20a33
institution	Universiti Malaysia Terengganu
collection	UMT Repository System
language	English
description	Fouling limits the process performance in membrane technology applications. Biofouling, on the other hand, is the major contributing factor in membrane fouling phenomena. When dealing with protein-based solutes, it is essential to control biofouling occurrence caused by bacterial growth on the membrane surfaces and in pores. AgNP is able to inhibit bacteria growth and improve the permeability of polymeric membrane while chitosan can improve membrane hydrophilicity and possess antibacterial properties. Thus, silver nanoparticles (AgNP) and chitosan were chosen as bacteria inhibitors due to their remarkable antibacterial properties. This study was carried out to determine the effect of AgNP, chitosan, and a combination of both on fouling occurrence during protein-based ultrafiltration. These experiments were conducted by using the native Polyethersulfone (PES) membrane in comparison with the PES-Ag membrane, PES-Chitosan membrane, and PES-Ag-Chitosan membrane at a controlled condition where 150ppm bovine serum albumin (BSA) was applied as a model protein. A resistance-in-series model was adopted to determine the magnitude of four major resistances that govern fouling mechanisms namely membrane (Rm), adsorption (Ra), pore plugging (Rg), and cake formation (Rc) resistances to obtain better insights into fouling occurrences. The resistances magnitude was significantly reduced and arranged in a sequence of Rg>Rm>Ra>Rc for the PES-Ag-Chitosan membrane. Foulant weight was significantly reduced by 56% for the PES-Ag-Chitosan membrane as compared to PES-Chitosan and PES-Ag membranes which marked a reduction of 53% and 50% respectively using iv Thermogravimetric analysis (TGA) analysis. Based on the fouling quantification analysed and resistance-in-series computed for BSA ultrafiltration in dead-end configuration, it was proposed that the modification of PES membrane by incorporating AgNP and surface modification via Chitosan simultaneously is favourable to be implemented to mitigate biofouling. It indicates that AgNP and chitosan have a synergistic effect in overcoming the fouling contributed by both - solutes depositions and bacterial growth.
format	Thesis
author	Nur Mahirah Chik@Ismail
spellingShingle	Nur Mahirah Chik@Ismail Study of foulants quantification of protein-based ultrafiltration using chitosan/silver nanoparticles polyethersulfone membranes
author_facet	Nur Mahirah Chik@Ismail
author_sort	Nur Mahirah Chik@Ismail
title	Study of foulants quantification of protein-based ultrafiltration using chitosan/silver nanoparticles polyethersulfone membranes
title_short	Study of foulants quantification of protein-based ultrafiltration using chitosan/silver nanoparticles polyethersulfone membranes
title_full	Study of foulants quantification of protein-based ultrafiltration using chitosan/silver nanoparticles polyethersulfone membranes
title_fullStr	Study of foulants quantification of protein-based ultrafiltration using chitosan/silver nanoparticles polyethersulfone membranes
title_full_unstemmed	Study of foulants quantification of protein-based ultrafiltration using chitosan/silver nanoparticles polyethersulfone membranes
title_sort	study of foulants quantification of protein-based ultrafiltration using chitosan/silver nanoparticles polyethersulfone membranes
granting_institution	Universiti Malaysia Terengganu
url	http://umt-ir.umt.edu.my:8080/jspui/bitstream/123456789/17577/1/Abstract%20TP%20248.25%20.M45%20N8%202022.pdf http://umt-ir.umt.edu.my:8080/jspui/bitstream/123456789/17577/2/Full%20thesis%20TP%20248.25%20.M45%20N8%202022.pdf
_version_	1776103976333213696

Study of foulants quantification of protein-based ultrafiltration using chitosan/silver nanoparticles polyethersulfone membranes

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