Article
Environmental Sciences
Ismail Koyuncu, Bahriye Eryildiz, Recep Kaya, Yucel Karakus, Fatemeh Zakeri, Alireza Khataee, Vahid Vatanpour
Summary: This study examined the performance of braid reinforced hollow fiber membrane containing PVDF embedded with WO3 nanosheets in treating textile wastewater in an MBR. The addition of 0.1 wt% of the nanosheets improved membrane hydrophilicity, porosity, and COD and color removal efficiency.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Engineering, Environmental
Mohammad Mirzaei, Toraj Mohammadi, Norollah Kasiri, Maryam Ahmadzadeh Tofighy
Summary: In this study, magnetized GO/Fe3O4/PES membrane exhibited superior performance over conventional membranes, with higher permeance, lower water contact angle, high rejection towards proteins, high pure water flux, and lower fouling rate. The magnetized membrane showed significant enhancement in performance compared to the regular membrane, making it suitable as a support layer for high-quality nanofiltration and reverse osmosis membranes.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Engineering, Chemical
Tao Zhang, Xin Guo, Brusly Solomon, Mohsen Sharifpur, Li-Zhi Zhang
Summary: In this study, a hydrophobic-hydrophilic composite hollow fiber membrane with remarkable antiwetting and antifouling properties was successfully prepared to address the issues of membrane fouling and wetting in seawater desalination. The membrane, prepared using a chemical grafting method, exhibited low moisture transfer resistance and a superhydrophobic surface, resulting in a sustained high permeate flux.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Engineering, Chemical
G. S. M. D. P. Sethunga, H. Enis Karahan, Rong Wang, Tae-Hyun Bae
Summary: Anaerobic wastewater treatment processes are increasingly popular due to their advantages in sludge management and net energy consumption, with methane production being a major benefit. Utilizing porous membranes for membrane contactor (MC) process offers a promising way to recover dissolved methane (dCH4) from anaerobic effluents, although membrane wetting and fouling remain implementation challenges. The development of wetting- and fouling-resistant hollow fiber membranes coated with polydimethylsiloxane (PDMS) and post-treated with PDMS-based amphiphilic copolymers shows improved performance in recovering methane from anaerobic effluents, making it a viable alternative for industrial practices.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Polymer Science
Basak Keskin, Bahriye Eryildiz, Mehmet Emin Pasaoglu, Turker Turken, Vahid Vatanpour, Ismail Koyuncu
Summary: Polyvinyl chloride (PVC) polymer was used for the first time in the fabrication of braid-reinforced hollow fiber membranes for ultrafiltration applications. The membranes exhibited different porosities and pore sizes due to the variations in PVC concentration. Characterizations such as scanning electron microscopy and contact angle were conducted to analyze membrane morphology, while the antifouling property was examined using bovine serum albumin (BSA).
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Engineering, Chemical
Sudesh Yadav, Ibrar Ibrar, Ali Altaee, Akshaya K. Samal, John Zhou
Summary: In this study, a commercial nanofiltration (NF) membrane was coated with cross-linked kappa-carrageenan and graphene oxide solution to improve salt rejection and antifouling properties. The coated membrane showed increased wettability and negative surface charge, leading to enhanced salt rejection. The optimal coated membrane exhibited high flux recovery ratio and low total fouling percentage.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Materials Science, Paper & Wood
Wei Zhao, Xin Jin, Kaikai Chen, Haoyang Ling, Zuwei Fan, Changfa Xiao
Summary: In this research, the hydrophilicity and anti-fouling property of cellulose acetate membranes were improved through the doping of graphene oxide (GO). The fabricated hollow fiber membranes with GO-doping exhibited a neatly arranged finger-like pore structure and good permeability. The membranes also showed high protein rejection and anti-fouling property. The optimal GO content was determined to be 0.1 wt%, and the membranes were suitable for high pressure backwash and aeration processes in filtration systems. Overall, the GO-doped cellulose acetate hollow fiber membranes showed potential applications in wastewater treatment and biomedical processes.
Article
Engineering, Environmental
Fatemeh Dolatkhah, Toraj Mohammadi, Maryam Ahmadzadeh Tofighy
Summary: In this study, charcoal-carbon nanomaterial was used to modify the polysulfone-based hollow fiber ultrafiltration membrane. The optimized membrane showed increased porosity and mean pore size, reduced surface roughness, and improved hydrophilicity. It also demonstrated high COD removal and protein rejection, as well as a high pure water flux.
JOURNAL OF WATER PROCESS ENGINEERING
(2022)
Article
Engineering, Environmental
Prakash Peechmani, Mohd Hafiz Dzarfan Othman, Roziana Kamaludin, Mohd Hafiz Puteh, Juhana Jaafar, Mukhlis A. Rahman, Ahmad Fauzi Ismail, Siti Hamimah Sheikh Abdul Kadir, Rosli Md. Illias, Joe Gallagher, Sabreenna Marsya Djuli
Summary: This study investigated the performance of hybrid ZnO/PSf BHFMs prepared using ZnO nanoparticles, showing excellent hydrophilicity, flux performance, and rejection rates under high pressure conditions, making them suitable for wastewater treatment applications.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Engineering, Environmental
Tutuk Djoko Kusworo, Andri Cahyo Kumoro, Nita Aryanti, Dani Puji Utomo
Summary: The study on novel PES nanohybrid membranes incorporating rGO and ZnO nanoparticles demonstrated significant improvement in membrane structure and performance, showing enhanced pollutant reduction and flux recovery ratio compared to conventional PES membranes.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Environmental Sciences
Foad Gholami, Sirus Zinadini, Soheila Nakhjiri Kamrani, Ali Akbar Zinatizadeh, Kiumars Bahrami
Summary: The study utilized modified graphene oxide with porphyrin and palladium to create a novel antifouling membrane, resulting in improved water flux and antifouling properties. By increasing the percentage of modified graphene oxide, the membrane showed enhanced performance in fouling behavior and dye rejection.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Chemistry, Physical
Quan-ya Wei, Hua Zhu, Shi-jin Yu, Guo-qian Xu, Jian-hong Yin, Jia-hao Tong, Tian-rui Chen, Xuan-nan He, Ping-chun Guo, He-dong Jiang, Jia-ke Li, Yan-xiang Wang
Summary: This work investigates the hollow structure that controls the Fe3O4@C void size using a template method to address the issue of large volume expansion during lithiation of iron oxide anode materials in lithium-ion batteries. The hollow structure is controlled by the dosage of ethyl orthosilicate (TEOS), and Fe2O3 is coated with phenolic resin to obtain an anode electrode material with excellent performance. The samples are analyzed for their microstructure and morphology as well as their electrical properties, and the Fe3O4@C-1.0 sample with a large vacancy shows exceptional electrochemical properties, rate performance, and stable cycle performance.
APPLIED SURFACE SCIENCE
(2023)
Review
Engineering, Environmental
Tausif Ahmad, Chandan Guria
Summary: Various industries generate wastewater containing toxic contaminants, and low-cost polyvinyl chloride (PVC) has attracted attention as a membrane material. However, fouling of hydrophobic PVC membranes is a major hindrance. To improve their performance, the hydrophilicity and fouling resistance properties of the PVC membranes should be enhanced. This review provides an overview of current trends, research, and developments in PVC membranes and discusses potential approaches for improving their performance.
JOURNAL OF WATER PROCESS ENGINEERING
(2022)
Article
Engineering, Environmental
Yanan Wang, Yujia Cui, Qilin Gui, Qi Ouyang, Kexing Hu, Shuxian Shi, Xiaonong Chen
Summary: The rapid and effective removal of pharmaceutical contaminants (PhCs) from water through adsorption is a big challenge due to the properties of most PhCs. Adsorptive membranes have advantages over conventional adsorbents for PhCs removal. This study developed PEG-coupled ionic grafting adsorption membranes with outstanding adsorption and antifouling performance for PhCs removal. The study provides a new design strategy for effective removal of PhCs from contaminated water using adsorptive membrane technique.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Engineering, Environmental
Chuanfeng Wang, Yingbo Chen, Xiaoyu Hu, Pengfei Guo
Summary: A dual-layer PVDF loose nanofiltration hollow fiber membrane with desirable properties was designed via phase inversion process, demonstrating low MWCO and excellent separation performance.
JOURNAL OF WATER PROCESS ENGINEERING
(2022)
Article
Environmental Sciences
Mahesan Naidu Subramaniam, Pei Sean Goh, Devagi Kanakaraju, Jun Wei Lim, Woei Jye Lau, Ahmad Fauzi Ismail
Summary: The article delves into the roles of photocatalysis and membrane technology in hybrid photocatalytic membranes for treating wastewater containing persistent organic pollutants (POP). It covers critical reviews on POP's impact, origins, and the challenges and future directions in this field, as well as discussing the fundamentals of photocatalytic mechanism and current trends in photocatalyst design.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Biochemistry & Molecular Biology
Ladan Zoka, Ying Siew Khoo, Woei Jye Lau, Takeshi Matsuura, Roberto Narbaitz, Ahmad Fauzi Ismail
Summary: The impact of flipping a membrane with dense/porous layer asymmetry on water flux was investigated in this study. The experimental results showed that when a membrane with hydrophilic/hydrophobic asymmetry was flipped, the water flux increased by two orders of magnitude, while for a ceramic membrane, the increase was only two times. A mathematical model based on Bernoulli's rule was developed to explain the increase in water flux in the inverted position. This work is of practical significance for cases where the direction of water flow is in the inverted position of the membrane.
Article
Green & Sustainable Science & Technology
Zahra Shokravi, Hoofar Shokravi, A. E. Atabani, Woei Jye Lau, Ong Hwai Chyuan, Ahmad Fauzi Ismail
Summary: This paper provides a compilation of technical developments aimed at promoting fatty acid profile (FAP) and lipid yield (LY) during the harvesting process of microalgae. Co-cultivating specific microalgae with fungi, bacteria, or other microalgae strains was found to improve flocculation efficiency and FAP&LY. Proper wet storage conditions and stress induction strategies could enhance FAP&LY efficiency and reduce expenses associated with cell drying and related equipment. Enhancing FAP&LY through the harvesting process could be a breakthrough technology for cost-efficient microalgaebased biodiesel production.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2022)
Article
Biochemistry & Molecular Biology
Siti Nur Amirah Idris, Nora Jullok, Woei Jye Lau, Akmal Hadi Ma'Radzi, Hui Lin Ong, Muhammad Mahyidin Ramli, Cheng-Di Dong
Summary: This study systematically investigated the effect of the molecular weight of polyethylene glycol (PEG) on the performance of thin-film composite (TFC) flat sheet polysulfone membrane. It was found that the PSf membrane modified with PEG 600 had the optimum composition. The modified membrane showed high water permeability and good mechanical stability, indicating its great potential in future osmotically powered generation systems.
Article
Chemistry, Multidisciplinary
Syarifah Nazirah Wan Ikhsan, Norhaniza Yusof, Farhana Aziz, Ahmad Fauzi Ismail, Norazanita Shamsuddin, Juhana Jaafar, Wan Norharyati Wan Salleh, Pei Sean Goh, Woei Jye Lau, Nurasyikin Misdan
Summary: This study successfully synthesized a functionalized nanocomposite coating with simultaneous hydrophilic and oleophobic properties for improving the efficiency of polymer membranes in separating oil-in-water wastewater. The coating, prepared via sol-gel technique and optimized through various characterizations and Response Surface Modification, exhibited high hydrophilicity and enhanced oleophobicity, with water contact angle of 11 degrees and oil contact angle of 171.3 degrees.
Article
Polymer Science
Furkan Turgut, Chun Yew Chong, Mustafa Karaman, Woei Jye Lau, Mehmet Gursoy, Ahmad Fauzi Ismail
Summary: In this study, two different monomers were used to modify graphene oxide (GO) nanosheets via an environmentally friendly plasma-enhanced method. The modified GOs were then used as nano-fillers for the development of a composite polyethersulfone ultrafiltration membrane with improved surface properties. The results showed that the membrane incorporated with hydrophilic-coated GOs achieved better oil rejection, antifouling resistance, and water recovery rate compared to the membrane incorporated with hydrophobic-coated GOs.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Biochemistry & Molecular Biology
Noresah Said, Kar Chun Wong, Woei Jye Lau, Ying Siew Khoo, Yin Fong Yeong, Nur Hidayati Othman, Pei Sean Goh, Ahmad Fauzi Ismail
Summary: Most researchers focused on developing highly selective membranes for CO2/CH4 separation, but their developed membranes often suffered from low permeance. This study aimed to develop an ultrahigh permeance membrane using a simple coating technique. By modifying the surface of a commercial silicone membrane with tetraethyl orthosilicate (TEOS), the researchers were able to achieve a CO2/CH4 selectivity of 19 and a high permeance level.
Article
Chemistry, Analytical
Naveen Sunder, Yeong-Yin Fong, Mohamad Azmi Bustam, Woei-Jye Lau
Summary: The increase in global population has led to a higher demand for energy production, which has mainly been met through the burning of natural gas. However, the purification of natural gas has caused an increase in CO2 levels. Hollow fiber membranes, specifically the NH2-MIL-125(Ti)/CTA HFMMMs, offer a more efficient and sustainable solution for carbon capture due to their large surface-to-volume ratio and smaller footprint. These membranes demonstrate a promising CO2/CH4 ideal gas selectivity and CO2 permeability, making them a potential technology for reducing CO2 emissions.
Article
Environmental Sciences
Noresah Said, Woei Jye Lau, Muhammad Nidzhom Zainol Abidin, Amir Mansourizadeh, Ahmad Fauzi Ismail
Summary: In this study, poly(citric acid)-grafted graphene oxide (PGO) was incorporated into single-layer hollow fiber (SLHF) and dual-layer hollow fiber (DLHF) membranes to improve their antifouling properties during water treatment. The optimized PGO loading of 0.7 wt% in SLHF membrane resulted in higher water permeability and bovine serum albumin rejection compared to the neat membrane. Similarly, introducing 0.7 wt% PGO only to the outer layer of DLHF membrane improved its antifouling properties and increased the rejection rate of bovine serum albumin to 97.7%.
ENVIRONMENTAL TECHNOLOGY
(2023)
Article
Polymer Science
Kopano Edward Mokubung, Lloyd Njoka Ndlovu, Woei Jye Lau, Edward Ndumiso Nxumalo, Nozipho Nonsikelelo Gumbi
Summary: This study fabricated mixed matrix membranes (MMMs) for ultrafiltration using 3-aminopropyltriethoxysilane modified magnetite iron oxide nanoparticles (A-Fe3O4 NPs) through a modified phase inversion technique. The physiochemical properties and surface morphologies of the synthesized A-Fe3O4 NPs and fabricated MMMs were examined using advanced characterization techniques. The incorporation of higher loadings of A-Fe3O4 NPs in the membrane matrix significantly improved the adsorptive ability and hydrophilicity of the adsorbent, leading to improved membrane water permeance, adsorption rate, and adsorption-filtration properties.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Polymer Science
Wan Nur Ain Shuhada Abdullah, Nadiene Salleha Mohd Nawi, Woei Jye Lau, Yeek Chia Ho, Farhana Aziz, Ahmad Fauzi Ismail
Summary: In this study, a new type of nanofiltration (NF) membrane with a hydrophilic coated PAN/PPSU substrate was fabricated, aiming to improve membrane performance for water and wastewater treatment. The PAN/PPSU substrate with a weight ratio of 1:5 produced the TFC membrane with the highest water flux and divalent salt rejection. Furthermore, the introduction of a hydrophilic PDA/GO coating layer improved the water flux of the membrane without compromising salt rejection.
Article
Biochemistry & Molecular Biology
Kathleen Foo, Yong Yeow Liang, Woei Jye Lau, Md Maksudur Rahman Khan, Abdul Latif Ahmad
Summary: Desalination of high-salinity water, also known as hypersaline brine, is a method to address the issue of brine disposal. However, the energy consumption is high in hypersaline brine desalination due to the high operating pressure. A parametric analysis on a spiral wound membrane module was conducted to predict the performance of hypersaline brine desalination. The study found that a minimum inlet pressure of 75 bar is recommended to minimize energy consumption, and higher feed velocity can increase productivity without significantly increasing energy requirements. The efficiency of pressure recovery and pump play a crucial role in reducing specific energy consumption (SEC) in hypersaline brine desalination using spiral wound membrane, and utilizing them with high efficiencies (eta(R) >= 95% and eta(pump) >= 50%) can reduce SEC by at least 33% while achieving a comparable SEC with seawater reverse osmosis (SWRO) desalination (<5.5 kWh/m(3)).
Article
Biochemistry & Molecular Biology
En Qi Lim, Mei Qun Seah, Woei Jye Lau, Hasrinah Hasbullah, Pei Sean Goh, Ahmad Fauzi Ismail, Daryoush Emadzadeh
Summary: Many commercial nanofiltrations (NF) and reverse osmosis (RO) membranes were evaluated for their efficiency in removing phthalates from water sources. It was found that the NF3 membrane showed the best performance in removing phthalates regardless of pH, due to its surface properties and appropriate pore size. Additionally, the NF3 membrane exhibited higher water flux compared to the RO membranes. However, further research is needed to investigate the effects of other compounds on membrane performance.
Article
Biochemistry & Molecular Biology
Sutrasno Kartohardjono, Ghofira Muna Khansa Salsabila, Azzahra Ramadhani, Irfan Purnawan, Woei Jye Lau
Summary: The study focuses on utilizing PVDF membranes incorporated with PVP additives for the treatment of oily wastewater through the UF process. The addition of PVP improves the physical and chemical properties of the membrane, resulting in increased permeability and hydrophilicity. However, the rejections for TSS, turbidity, TDS, and COD are reduced with increasing PVP content.