Article
Chemistry, Physical
Jun Lei, Zhiguang Guo
Summary: The study shows that the separation performance of PES asymmetric membrane is closely related to the wettability of the membrane, with the side that is more hydrophilic and oleophobic exhibiting better separation performance, including higher separation flux and better antifouling performance.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2021)
Article
Engineering, Chemical
Baiwang Zhao, Jun Wen Wong, Can Zeng Liang, Ji Wu, Tai-Shung Chung, Sui Zhang
Summary: Researchers developed an inner-selective polyethersulfone-polydimethylsiloxane (PES-PDMS) thin-film composite (TFC) hollow fiber membrane for CO2/N2 separation. The membrane exhibited high CO2 permeance and CO2/N2 selectivity, making it a promising candidate for post-combustion CO2 capture.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Engineering, Chemical
Zhengchi Yin, Xiaoke Wu, Yanwei Yang, Huayu Zhang, Wangtao Li, Ruimin Zhu, Qiancheng Zheng, Zhengbao Wang
Summary: Compared to inorganic supports, polymeric supports offer additional benefits such as easier processing and lower cost. However, the weak adhesion of the organic surface to the ZIFs membrane layer usually requires complex surface modification or seeding. This study demonstrates that a dual-layer asymmetric polymer support prepared by a simple spinning process is a promising candidate for ZIF-8 membrane preparation.
CHINESE JOURNAL OF CHEMICAL ENGINEERING
(2023)
Article
Engineering, Chemical
Zhengda Lin, Yijun Liu, Zhongming Zhang, Jie Yao
Summary: This study utilized a high-temperature steam-induced hydrolysis method to produce a fluorinated OH/SiO2-TiO2/PES composite hollow fiber membrane for CO2 capture. The membrane exhibited better separation performance in the CO2/CH4 separation test compared to the original PES membrane. The effects of absorbent flow rate, absorbent concentration, and feed gas flow rate on CO2 flux and CO2/CH4 selectivity were investigated. The findings suggest the potential application of fluorinated OH/SiO2-TiO2/PES composite membranes in carbon capture and CO2/CH4 separation in GLMC applications.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Engineering, Chemical
Seong-Jun Cho, Yogita M. Shirke, Soon Jin Kwon, Seong Uk Hong, Jong Hak Kim, Jae-Deok Jeon
Summary: We propose a new method that utilizes HDPE ultrafiltration hollow fibers as dehumidification membranes. These membranes have a wide range of applications and can also recover water. To address the issue of large pores in low-cost substrates like HDPE, we filled the pores with hydrogels made from viscous solutions. The resulting pore-filled membranes showed good water vapor separation capabilities.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Polymer Science
Tarek Ashraf, Nada Alfryyan, Mervat Nasr, Sayed A. Ahmed, Mohamed Shaban
Summary: Nanofiltration membranes embedded with nanomaterials show promising potential in the treatment of produced water in oil fields, as they improve filtration efficiency, water flux, and anti-fouling properties.
Article
Engineering, Environmental
Shuhua Wang, Zeling Wen, Sheng Shi, Wensheng Hou
Summary: The PAN/RGO composite porous material prepared in this study showed excellent adsorption capacity towards oil and organic solvents, as well as resistance to chemical corrosion. It is a cost-effective, efficient, and environmentally friendly material for oil-water separation and waste oil recycling.
JOURNAL OF WATER PROCESS ENGINEERING
(2021)
Article
Engineering, Chemical
Azarakhsh Heidari, Elaheh Abdollahi, Toraj Mohammadi, Amir Atabak Asadi
Summary: In this study, carboxylic polyethersulfone (CPES) was successfully synthesized and used in the fabrication of CPES/PES blend membranes, which showed improved hydrophilicity and permeability. The presence of CPES also enhanced the assembly of HPEI thin-film layers, resulting in higher MgCl2 rejection in NF membranes.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Engineering, Chemical
Ye-Qi Hu, Hao-Nan Li, Zhi-Kang Xu
Summary: This study demonstrates the fabrication of Janus hollow fiber membranes with functionalized outer surface for the continuous demulsification and separation of oil-in-water emulsions. The prepared membranes can continuously separate surfactant-stabilized oil-in-water emulsions with high efficiency.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Biochemistry & Molecular Biology
Meor Muhammad Hafiz Shah Buddin, Abdul Latif Ahmad, Muhd Izzudin Fikry Zainuddin
Summary: This study predicted the permeance of CO2 across a ZIF-L@PDMS/PES composite membrane using two different models. The presence of ZIF-L in the PDMS matrix enhanced both the permeability and selectivity of CO2. The performance of the ZIF-L@PDMS layer was well-predicted by the Cussler model and the CO2 permeance across the composite membrane was successfully modeled using the resistance in series model with a correction factor.
Article
Engineering, Chemical
Ruili Li, Guoqing Xiao, Chunlin Chen, Chunyan Chen, Shuyi Shang, Yuanyuan Li, Zhengwei Yang, Qian Liu
Summary: In this study, a composite membrane consisting of graphene oxide (GO) and composite nanospheres (CNS@LDH and HOTiO2) was successfully synthesized for dye separation. The composite membrane exhibited significantly improved water flux and rejection rate, and maintained stable performance under extreme conditions. These findings suggest that the GO/HOTiO2/CNS@LDH composite membrane has great potential for practical wastewater treatment.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Green & Sustainable Science & Technology
Wei Qiu, Jing Dai, Huajiang Wang, Zhaoliang Cui, Zhaohui Wang, Xiaozu Wang
Summary: The aim of this study was to purify CH4 and remove CO2 to improve its combustion efficiency. Hybrid hollow fiber membranes were developed and optimized for CO2/CH4 separation. A poly(ether block-amide) coating was applied to further enhance the membrane's performance.
ENVIRONMENTAL PROGRESS & SUSTAINABLE ENERGY
(2023)
Article
Biochemistry & Molecular Biology
Ook Choi, Iqubal Hossain, Insu Jeong, Chul-Ho Park, Yeonho Kim, Tae-Hyun Kim
Summary: Thin-film composite mixed matrix membranes were fabricated using interfacial polymerization to achieve high CO2 permeance and selectivity. The study revealed the importance of substrate properties and the use of surfactant SDS to enhance membrane structure and gas permeation properties. Additionally, thin-film composite hollow fiber membranes containing modified graphene oxide showed promising separation performance.
Article
Engineering, Environmental
Yifan Li, Yanfeng Cui, Zihan Liu, Keli Yang, Yaping Dong, Xin Liu, Huacheng Xu
Summary: In this study, a multifunctional GO@PDA@Ag/PES membrane with rough structure was successfully fabricated for efficient emulsion separation and mechanochemical performance in high-salt brine systems. The membrane exhibited remarkable separation efficiency for surfactant stabled emulsions and demonstrated excellent structural stability even in corrosive environments. The membrane's robust mechanochemical properties could be attributed to the covalent bond bridged structure crosslinked by polydopamine and the non-covalent interactions between GO and PES.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Chemistry, Multidisciplinary
Ali Behboudi, Toraj Mohammadi, Mathias Ulbricht
Summary: Surface-modified silver nanoparticles with different functional groups were synthesized and used as functional fillers in nanocomposite membranes for membrane bioreactors (MBRs). The modifications successfully immobilized the nanoparticles inside the membrane, reducing silver release. The modified nanoparticles exhibited enhanced antimicrobial activity and improved the antifouling properties of the membranes. This led to significant improvements in MBR performance, with increased flux, COD removal, and flux recovery.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2023)
Article
Environmental Sciences
Muhammad Shafiq Mat Shayuti, Suzalina Zainal, Tuan Mohammad Yusoff Shah Tuan Ya, Mohamad Zaki Abdullah, Munawar Zaman Shahruddin, Nur Hidayati Othman, Nur Hashimah Alias, Tengku Amran Tengku Mohd, Rahida Wati Sharudin
Summary: Sand production is a major challenge in many oil and gas fields globally, and the potential hazards of contaminants in the produced sand are often overlooked. This study aimed to evaluate the presence of contaminants in the produced sand from an offshore oilfield in Sabah, Malaysia, revealing the existence of harmful pollutants.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Materials Science, Multidisciplinary
Mohamed Hasaan Hussain, Noor Fitrah Abu Bakar, Michael Chung, Nurul Faizatul Nadia Khalid, Nur Hidayati Othman, Huey Ling Tan, Mohamed Syazwan Osman, Zainovia Lockman, Norbert Radacsi
Summary: Reduced graphene oxide (rGO) combined with zeolitic imidazolate framework (ZIF) was incorporated with polyetherimide (PEI) via electrospinning to produce nanofibers with high porosity and enhanced conductivity.
EMERGENT MATERIALS
(2023)
Article
Engineering, Environmental
Tutuk Djoko Kusworo, Andri Cahyo Kumoro, Nita Aryanti, Tonni Agustiono Kurniawan, Febio Dalanta, Nur Hashimah Alias
Summary: The addition of ZnO-MnO2@SiO2 photocatalyst composite to the PSf membrane improves its performance and enhances the treatment of NRW. The composite membrane has a well-constructed structure and a uniform dispersion of photocatalyst elementals, and it exhibits stable flux, recyclability, and antifouling properties under UV light irradiation.
CHEMICAL ENGINEERING JOURNAL
(2023)
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
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.
Review
Energy & Fuels
Sumaiya Zainal Abidin, Osarieme Uyi Osazuwa, Nur Hidayati Othman, Herma Dina Setiabudi, Sarina Sulaiman
Summary: Scientists are currently focusing on the production of eco-friendly fuels, and the conversion of biomass into H-2 has gained attention. Catalytic gasification of biomass to overcome environmental issues has been proposed, but the process generates tar as a by-product, posing challenges. Steam reforming has emerged as a promising method for tar conversion due to its potential to provide more H-2, but it requires a catalyst. The review highlights recent advancements in catalytic biomass tar reforming, with a focus on toluene as the model compound, along with discussions on reaction pathways, catalyst deactivation, and future prospects.
BIOMASS CONVERSION AND BIOREFINERY
(2023)
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.
Article
Multidisciplinary Sciences
Nurul Aina Syahirah Khairul Nizam, Nurina Adriana Abdul Razak, Nur Hidayati Othman, Muhammad Shafiq Mat Shayuti, Fauziah Marpani, Nur Hashimah Alias, Munawar Zaman Shahruddin, Soh Wei Kian, Farahdila Kadirkhan
Summary: The increasing emissions of carbon dioxide (CO2) and volatile hydrocarbons from burning fossil fuels have led to significant global warming and air pollution. To mitigate the environmental impact of fossil fuels, there has been a growing interest in utilizing CO2 generated through new technologies to produce alternative fuels. Dimethyl ether (DME) is one such clean alternative fuel that has been investigated for a more sustainable and greener environment. This paper discusses the direct synthesis of DME from CO2 through dehydrogenation and dehydration reactions, highlighting the challenges and difficulties associated with reactor development and proposing future directions.
MALAYSIAN JOURNAL OF FUNDAMENTAL AND APPLIED SCIENCES
(2023)
Review
Biochemistry & Molecular Biology
Yong Zen Tan, Nur Hashimah Alias, Mohd Haiqal Abd Aziz, Juhana Jaafar, Faten Ermala Che Othman, Jia Wei Chew, Chii-Dong Ho
Summary: Nanofibrous membranes have shown promise in membrane distillation for water and wastewater treatment, but fouling and wetting are still critical issues. This mini-review discusses the understanding and limitations of fouling in membrane distillation, including organic, inorganic, and biofouling. It also highlights progress in developing anti-fouling nanofibrous membranes and modifications for improved performance. Challenges and future directions for developing anti-fouling nanofiber membranes for membrane distillation are systematically addressed.