Polyethersulfone-silicon dioxide hollow fiber ultrafiltration membrane for removal of bisphenol A

Extensive utilization of bisphenol A (BPA) in industrial production of polycarbonate plastics has led to frequent detection of BPA in water sources. It is a main concern among society as BPA is one of the endocrine disruption compounds that can cause hazard to human health even at extremely low conc...

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Main Author:	Muhamad, Mimi Suliza
Format:	Thesis
Language:	English
Published:	2016
Subjects:	TA Engineering (General) Civil engineering (General)
Online Access:	http://eprints.utm.my/id/eprint/84186/1/MimiSulizaMuhamadPFKA2016.pdf
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spelling	my-utm-ep.841862019-12-16T01:56:48Z Polyethersulfone-silicon dioxide hollow fiber ultrafiltration membrane for removal of bisphenol A 2016-11 Muhamad, Mimi Suliza TA Engineering (General). Civil engineering (General) Extensive utilization of bisphenol A (BPA) in industrial production of polycarbonate plastics has led to frequent detection of BPA in water sources. It is a main concern among society as BPA is one of the endocrine disruption compounds that can cause hazard to human health even at extremely low concentration exposure. In view of this, polyethersulfone-silicon dioxide (PES-SiO2) hollow fiber ultrafiltration (UF) membrane was developed in this study and used as advanced water treatment process to tackle the problem of BPA. The membrane is composed of PES as main membrane forming material, dimethylacetamide as solvent and two additives i.e. SiO2 nanoparticles and polyvinylpyrrolidone. The SiO2 nanoparticles were initially modified using sodium dodecyl sulfate (SDS) prior to blending into PES dope solution at different loadings (0, 1, 2 and 4 wt.%). The control PES and PES-SiO2 membranes were fabricated via dry-jet wet spinning process. The modified SiO2 nanoparticles and the membranes were characterized before the membrane performances were tested in filtration and batch adsorption study using water sample collected from a water treatment plant in Skudai, Johor. The transmission electron microscope results reveal that the surface modification of SiO2 nanoparticle using SDS was able to reduce agglomeration effect between the nanoparticles. The PES-SiO2 membranes improved mechanical, thermal, and hydrophilicity property compared to control PES membrane. The membranes also displayed higher water flux and BPA removal, owing to the presence of silanol and siloxane bonding groups which contribute to the BPA removal via adsorption mechanism. The blending of 2 wt.% SiO2 shows the highest membrane performances, recording 73.3 L/m2.h.bar water flux and 86% BPA removal. This membrane also shows 53 µg/g BPA adsorption capacity that is in accordance to the pseudo-secondorder kinetic model. Therefore, the membrane was selected for further studies under the effect of natural organic matter (NOM) and operating parameters towards removal of BPA. The presence of NOM exhibited negative impacts on the water flux and BPA removal due to membrane fouling and competition for adsorption site with BPA. The results for the effects of operating parameters demonstrated that promising BPA removal at 90-96% could be achieved. Furthermore, backwash cleaning of the membrane was able to recover more than 80% of BPA removal after three consecutive cycles of filtration. The optimization process of developed model via historical data design of research surface methodology (RSM) on the other hand, had predicted the optimum conditions for BPA removal were at the pressure of 1 bar, pH 7, 10 µg/L BPA concentration, and filtration time of 10 min that correspond to 99.61% BPA removal. In conclusion, the developed PES-SiO2 hollow fiber UF membrane system was found to have high potential for BPA removal and application in water treatment process. 2016-11 Thesis http://eprints.utm.my/id/eprint/84186/ http://eprints.utm.my/id/eprint/84186/1/MimiSulizaMuhamadPFKA2016.pdf application/pdf en public http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:126205 phd doctoral Universiti Teknologi Malaysia, Faculty of Civil Engineering Faculty of Civil Engineering
institution	Universiti Teknologi Malaysia
collection	UTM Institutional Repository
language	English
topic	TA Engineering (General) Civil engineering (General)
spellingShingle	TA Engineering (General) Civil engineering (General) Muhamad, Mimi Suliza Polyethersulfone-silicon dioxide hollow fiber ultrafiltration membrane for removal of bisphenol A
description	Extensive utilization of bisphenol A (BPA) in industrial production of polycarbonate plastics has led to frequent detection of BPA in water sources. It is a main concern among society as BPA is one of the endocrine disruption compounds that can cause hazard to human health even at extremely low concentration exposure. In view of this, polyethersulfone-silicon dioxide (PES-SiO2) hollow fiber ultrafiltration (UF) membrane was developed in this study and used as advanced water treatment process to tackle the problem of BPA. The membrane is composed of PES as main membrane forming material, dimethylacetamide as solvent and two additives i.e. SiO2 nanoparticles and polyvinylpyrrolidone. The SiO2 nanoparticles were initially modified using sodium dodecyl sulfate (SDS) prior to blending into PES dope solution at different loadings (0, 1, 2 and 4 wt.%). The control PES and PES-SiO2 membranes were fabricated via dry-jet wet spinning process. The modified SiO2 nanoparticles and the membranes were characterized before the membrane performances were tested in filtration and batch adsorption study using water sample collected from a water treatment plant in Skudai, Johor. The transmission electron microscope results reveal that the surface modification of SiO2 nanoparticle using SDS was able to reduce agglomeration effect between the nanoparticles. The PES-SiO2 membranes improved mechanical, thermal, and hydrophilicity property compared to control PES membrane. The membranes also displayed higher water flux and BPA removal, owing to the presence of silanol and siloxane bonding groups which contribute to the BPA removal via adsorption mechanism. The blending of 2 wt.% SiO2 shows the highest membrane performances, recording 73.3 L/m2.h.bar water flux and 86% BPA removal. This membrane also shows 53 µg/g BPA adsorption capacity that is in accordance to the pseudo-secondorder kinetic model. Therefore, the membrane was selected for further studies under the effect of natural organic matter (NOM) and operating parameters towards removal of BPA. The presence of NOM exhibited negative impacts on the water flux and BPA removal due to membrane fouling and competition for adsorption site with BPA. The results for the effects of operating parameters demonstrated that promising BPA removal at 90-96% could be achieved. Furthermore, backwash cleaning of the membrane was able to recover more than 80% of BPA removal after three consecutive cycles of filtration. The optimization process of developed model via historical data design of research surface methodology (RSM) on the other hand, had predicted the optimum conditions for BPA removal were at the pressure of 1 bar, pH 7, 10 µg/L BPA concentration, and filtration time of 10 min that correspond to 99.61% BPA removal. In conclusion, the developed PES-SiO2 hollow fiber UF membrane system was found to have high potential for BPA removal and application in water treatment process.
format	Thesis
qualification_name	Doctor of Philosophy (PhD.)
qualification_level	Doctorate
author	Muhamad, Mimi Suliza
author_facet	Muhamad, Mimi Suliza
author_sort	Muhamad, Mimi Suliza
title	Polyethersulfone-silicon dioxide hollow fiber ultrafiltration membrane for removal of bisphenol A
title_short	Polyethersulfone-silicon dioxide hollow fiber ultrafiltration membrane for removal of bisphenol A
title_full	Polyethersulfone-silicon dioxide hollow fiber ultrafiltration membrane for removal of bisphenol A
title_fullStr	Polyethersulfone-silicon dioxide hollow fiber ultrafiltration membrane for removal of bisphenol A
title_full_unstemmed	Polyethersulfone-silicon dioxide hollow fiber ultrafiltration membrane for removal of bisphenol A
title_sort	polyethersulfone-silicon dioxide hollow fiber ultrafiltration membrane for removal of bisphenol a
granting_institution	Universiti Teknologi Malaysia, Faculty of Civil Engineering
granting_department	Faculty of Civil Engineering
publishDate	2016
url	http://eprints.utm.my/id/eprint/84186/1/MimiSulizaMuhamadPFKA2016.pdf
_version_	1747818443236704256

Polyethersulfone-silicon dioxide hollow fiber ultrafiltration membrane for removal of bisphenol A

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