Article
Polymer Science
Si Li, Hannah McGinness, Tao Wang, Ruilan Guo
Summary: This study focuses on preparing a series of crosslinked Matrimid (R)-like films with varied crosslink density, leading to enhanced permeability and selectivity for gas separations. Introducing bulky groups at crosslink sites is found to counteract densification effect induced by crosslinking, demonstrating a fundamentally new strategy for regulating the microstructure and properties of crosslinked membranes.
Article
Engineering, Chemical
Seong-Joong Kim, Jeong F. Kim, Young Hoon Cho, Seung-Eun Nam, Hosik Park, You-In Park
Summary: The study found that pre-crosslinking density is critical for the aging suppression of CMS membranes, resulting in a significant improvement in long-term stability.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Engineering, Chemical
Alexander T. Bridge, Noah P. Wamble, Matthew S. Santoso, Joan F. Brennecke, Benny D. Freeman
Summary: This study demonstrates the reproducible preparation of high-flux defect-free asymmetric gas separation membranes using Cyrene(TM) as a majority dope formulation component. By adjusting the volume ratios of Cyrene(TM) and THF, as well as the concentrations of Matrimid(R) and the dry step time, optimal membrane performance is achieved.
JOURNAL OF MEMBRANE SCIENCE
(2024)
Article
Engineering, Chemical
Qing Wang, Nong Xu, Qiao Liu, Qiang Dong, Hiroki Nagasawa, Masakoto Kanezashi, Rongfei Zhou, Toshinori Tsuru
Summary: The physicochemical and pore structural variations of SiC-based membranes derived from different air-curing and pyrolysis temperatures were systematically investigated. The performance of these membranes in the separation of various organic mixtures was evaluated, with the most outstanding results achieved by SiC-based membranes with a pore size of 0.50 nm that were air-cured at 150 degrees C and pyrolyzed at 750 degrees C.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Review
Polymer Science
Pablo Fernandez-Castro, Alfredo Ortiz, Daniel Gorri
Summary: Hydrogen recovery is a key focus in government-promoted energy transition guidelines due to its potential as an energy resource and the demand for energetically nonintensive recovery methods. The use of polymeric membranes in selective gas separations, particularly Matrimid(R) as a polyimide, has shown promise for selectively recovering hydrogen with relatively good performance. Research is ongoing to develop enhanced features and membrane fabrication procedures to improve the effectiveness of hydrogen recovery.
Article
Biochemistry & Molecular Biology
Tae Hoon Lee, Byung Kwan Lee, Jin Sung Park, Jinmo Park, Jun Hyeok Kang, Seung Yeon Yoo, Inho Park, Yo-Han Kim, Ho Bum Park
Summary: Polyimide membranes have been extensively studied for gas separation applications due to their high separation abilities and excellent processability. Diamine modification can be used to tune the separation performance, and fluorinated modifiers have been found to improve the chain packing modes of the membranes, leading to higher gas permeability and selectivity.
Article
Biochemistry & Molecular Biology
Daniel Gonzalez-Revuelta, Marcos Fallanza, Alfredo Ortiz, Daniel Gorri
Summary: This study aims to develop cost-effective multilayer hollow fiber composite membranes for the separation of oxygen and nitrogen from air. Three different configurations of membranes were studied to compare their separation performance. The innovation of this study lies in the manufacture of hollow fiber membranes and the treatment of Matrimid, which allows for thinner dense layers and higher permeance values, making it suitable for industrial applications.
Article
Engineering, Chemical
Wei Xie, Peijun Zheng, Yiwen Chen, Hongjun Zhang, Qi Wu, Hongyan Liu, Ying Sun, Haitao Wang, Shuangjiang Luo
Summary: In situ thermal oxidative cross-linking is an efficient strategy for manipulating the microporosity in polymeric gas separation membranes. This study presents a rational macromolecular design that combines microporous polymers with thermal oxidative cross-linking to fabricate highly permselective membranes for advanced energy-efficient gas separations. The results demonstrate that thermal treatment in air induces both oxidative chain scission and thermal oxidative cross-linking, leading to a hierarchically microporous architecture that enhances both permeability and selectivity. The study also shows that the microcavity characteristics and gas permeation performance of the thermal-oxidatively cross-linked membranes can be tunable by regulating the polymer structure, oxidative temperature, and reaction time.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Article
Engineering, Environmental
Hyun Jung Yu, Heseong An, Ju Ho Shin, Adele Brunetti, Jong Suk Lee
Summary: A new dip-coating technique was developed to fabricate defect-free and plasticization-resistant polyimide hollow fiber membranes on a crosslinked polyimide/polysilsesquioxane hollow fiber support. The resulting membranes exhibited improved CO2/CH4 separation performance compared to solution-coated counterparts. The practical applicability of the membranes was confirmed as they showed resistance to plasticization when exposed to a mixed feed of equimolar CO2/CH4.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Multidisciplinary
Shahin Rashidian, Mohammadreza Omidkhah Nasrin, Mona Zamani Pedram, Siamak Hoseinzadeh
Summary: Our study used molecular dynamics (MD) simulations to analyze the behavior of neat and mixed matrix membranes (MMMs) using BIOVIA Materials Studio 2021 software programs. By adding particles to the membranes, the D-space and amorphous state of Matrimid 5218 (MAT) membranes were enhanced. Calix[4]arene (CA) particles improved the physicochemical properties of the membranes, such as fractional free volume, glass transition temperature, and moduli indicators. The transport properties and selective behaviors of N2, CH4, and CO2 gases were also analyzed. Increasing pressure resulted in increased gas adsorption, with CO2 being more readily absorbed than N2 or CH4. MMMs filled with 0.75% CA particles showed improved CO2 permeability and selectivity compared to neat MAT membranes. The measured transport properties indicated that the MAT-CA (0.75%) membrane is suitable for industrial applications, including natural gas treatment.
ENGINEERING ANALYSIS WITH BOUNDARY ELEMENTS
(2023)
Article
Chemistry, Inorganic & Nuclear
Ming Liu, Ran Cen, Cheng-Hui Wang, Qing-Hong Bai, Li-Xia Chen, Shang-Wei Yuan, An-Ting Zhao, Pei-Hua Ma, Zhu Tao, Xin Xiao
Summary: This study presents a strategy for the separation of phenylenediamine (PDA) isomers using four supramolecular framework materials. The findings show that these materials exhibit remarkable selectivity for different PDA mixtures. The study highlights the potential utility of ns-Q[10] in isolating organic molecules.
INORGANIC CHEMISTRY
(2023)
Article
Biochemistry & Molecular Biology
Mariagiulia Longo, Marcello Monteleone, Elisa Esposito, Alessio Fuoco, Elena Tocci, Maria-Chiara Ferrari, Bibiana Comesana-Gandara, Richard Malpass-Evans, Neil B. McKeown, Johannes C. Jansen
Summary: In this study, thin film composite membranes were fabricated with a blend of polyimide and polymer of intrinsic microporosity. The effect of different polymer ratios on gas transport properties was analyzed, and the role of different commercial porous supports in membrane preparation was investigated. The results showed that a support with a small pore size favored the formation of a defect-free dense layer. The TFC membranes exhibited higher selectivity and a certain degree of permeance increase compared to the reference membrane.
Review
Chemistry, Multidisciplinary
Wei-Hua Han, Qing-Yu Wang, Yuan-Yi Kang, Li-Rui Shi, Yu Long, Xin Zhou, Chun-Cheng Hao
Summary: This review comprehensively discusses the cross-linking electrospinning system for the first time, including cross-linking strategies, cross-linking mechanisms, and applications of cross-linked electrospun nanofibers. The significance of cross-linking electrospinning and the challenges in constructing this system are also highlighted.
Article
Nanoscience & Nanotechnology
Leiqing Hu, Vinh T. Bui, Liang Huang, Rajinder P. Singh, Haiqing Lin
Summary: The study found that Polybenzimidazole (PBI) can be cross-linked with polycarboxylic acids to improve its H2/CO2 separation properties, and the acid-doped samples demonstrate stable separation performance at high temperatures and humidity.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Environmental Sciences
Xia Wang, Xi Zhao, Yannan Chen, Qingxin Wang, Hui Yang, Fei Xia
Summary: Several studies have shown that exposure to para-phenylenediamine (PPD) can negatively impact oocyte quality through damage to the spindle/chromosome structure, impaired oocyte development and fertilization potential, compromised cortical granule dynamics and ovastacin component, impaired Juno protein levels, and abnormal mitochondrial function leading to oocyte degeneration, apoptosis, and increased ROS levels.
ENVIRONMENTAL TOXICOLOGY
(2022)
Article
Engineering, Chemical
Zhi Chien Ng, Woei Jye Lau, Gwo Sung Lai, Jianqiang Meng, Huihui Gao, Ahmed Fauzi Ismail
Summary: In this study, a novel interlayer-assisted interfacial polymerization technique with the inclusion of graphene oxide (GO) was used to improve the permeability/selectivity trade-off, chlorine attack, and fouling issues of reverse osmosis membranes. The results showed that the PEI-interlayered thin film composite (iTFC) membrane exhibited higher pure water permeance and NaCl rejection compared to the conventional TFC (cTFC) membrane. The inclusion of 0.01 wt/v% GO further enhanced the performance of the iTFC membrane, producing a PEI-interlayered thin film nanocomposite (iTFN-10) membrane with greater pure water permeance without compromising rejection. The iTFN-10 membrane also demonstrated better antifouling and antibacterial properties compared to commercial membranes.
Article
Environmental Sciences
Roziana Kamaludin, Zatilfarihiah Rasdi, Mohd Hafiz Dzarfan Othman, Siti Hamimah Sheikh Abdul Kadir, Mohd Yusri Idorus, Jesmine Khan, Wan Nor I'zzah Wan Mohamad Zain, Ahmad Fauzi Ismail, Mukhlis A. Rahman, Juhana Jaafar
Summary: This study found that BPA exposure can affect the small intestine and intestinal barrier of pregnant rats and their fetuses, but BPA-treated water through photocatalytic membrane does not have detrimental effects on the gastrointestinal tract.
Article
Engineering, Chemical
Nur Diyana Suzaimi, Pei Sean Goh, Kar Chun Wong, Nik Ahmad Nizam Nik Malek, Ahmad Fauzi Ismail, Jun Wei Lim
Summary: This study demonstrates the use of nanomaterial-enabled templating strategy for the construction of a TFC substrate layer, which improves the separation performance of the membrane by adjusting the porosity and surface pore properties. The optimized TFC membrane shows increased water permeance while maintaining high rejection and better operational stability.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Polymer Science
Targol Hashemi, Mohammad Reza Mehrnia, Aydin Marandi, Ahmad Fauzi Ismail
Summary: Novel mixed matrix membranes were prepared using magnetic casting and nanocomposite technology, resulting in increased water flux and improved anti-fouling properties.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Yanuardi Raharjo, Ahmad Fauzi Ismail, Mohd Hafiz Dzarfan Othman, Mochamad Zakki Fahmi, Saiful, Djoko Santoso, Mochamad Ifan Nugroho, Diana Merna, Maipha Deapati Arief, Risma Chikita Pratama
Summary: This study aimed to develop a novel imprinted zeolite (IZC) and incorporate it into a polyethersulfone (PES) and poly(vinyl pyrrolidone) (PVP) mixed matrix membrane (HF-MMM) for hemodialysis treatment. The optimized parameters showed that this membrane has the potential to effectively remove uremic toxins.
Review
Chemistry, Multidisciplinary
Pei Sean Goh, Zahra Samavati, Ahmad Fauzi Ismail, Be Cheer Ng, Mohd Sohaimi Abdullah, Nidal Hilal
Summary: Membrane technology has gained popularity in industries for separation processes, desalination, and wastewater treatment. The development of nanocomposite membranes that merge nanotechnology and membrane technology has become a rapidly growing research area, motivated by the need for high-performance liquid separation membranes. The unique morphology and topology of nanostructured materials, such as TiO2, have attracted attention due to their hydrophilicity, antibacterial, and photocatalytic properties. This review provides an overview of the modifications of liquid separation membranes using TiO2 as an example of multidimensional nanomaterials, discussing their performance and advantages.
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
Chemistry, Multidisciplinary
A. Sumisha, G. Arthanareeswaran, A. F. Ismail
Summary: This study mainly focuses on the analysis of casein protein transport characteristics through ultrafiltration membranes. Polysulfone-based polymer membranes modified with different materials are used. The experimental results show that the transport of casein is controlled by convection.
SEPARATION SCIENCE AND TECHNOLOGY
(2023)
Article
Engineering, Chemical
Komathi Kannathasan, Juhana Jaafar, Nuor Sariyan Suhaimin, Nurul Natasha Mohammad Jafri, Sadaki Samitsu, N. H. Alias, A. F. Ismail, T. Matsuura, M. H. D. Othman, Mukhlis A. Rahman, Farhana Aziz, Norhaniza Yusof, Mohammed Rasool Qtaishat, M. I. Ismail
Summary: A novel method of fabricating translucent photocatalytic membrane using a modified morphological structure as a photocatalyst has been developed. The study highlights the effect of translucency on the efficiency of photocatalytic reactions.
CHEMICAL ENGINEERING RESEARCH & DESIGN
(2023)
Article
Engineering, Environmental
Nor Akalili Ahmad, Lih Jang Tam, Pei Sean Goh, Nurfirzanah Azman, Ahmad Fauzi Ismail, Khairulnadzmi Jamaluddin, Gangasalam Arthanareeswaran
Summary: In this study, a thin film composite (TFC) reverse osmosis (RO) membrane with high long-term stability and antifouling properties was developed by spray coating the polyamide (PA) layer with oppositely charged titania nanosheets (TNS). The manufactured membranes showed improved permeability and radionuclide rejection, making them suitable for treating radionuclide-containing wastewater. The findings highlight the potential of tailored TFC RO membranes in the treatment of radioactive wastewater.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Multidisciplinary Sciences
Noor Fauziyah Ishak, Nur Hidayati Othman, Najihah Jamil, Nur Hashimah Alias, Fauziah Marpani, Munawar Zaman Shahruddin, Lau Woei Jye, Ahmad Fauzi Ismail
Summary: Modifying polymeric membranes using ZIF-8 functionalized-2D nanofillers showed improved gas permeability and selectivity performance. The rGO/ZIF-8 and MoS2/ZIF-8 nanofillers were successfully synthesized and characterized. Addition of 10 wt% of each nanofiller to the PES solution resulted in MMMs with enhanced thermal stability. Compatibility between the 2D nanofillers and PES matrix was confirmed by FTIR and XRD analysis. The obtained MMMs exhibited significantly improved gas separation properties, demonstrating the potential of using 2D nanofillers for high-performance membranes.
PERTANIKA JOURNAL OF SCIENCE AND TECHNOLOGY
(2023)
Article
Engineering, Environmental
Nurul Syazana Fuzil, Nur Hidayati Othman, Nur Hashimah Alias, Fauziah Marpani, Muhammad Shafiq Mat Shayuti, Munawar Zaman Shahruddin, Mohd Rizuan Mohd Razlan, Norazah Abd Rahman, Woei Jye Lau, Mohd Hafiz Dzarfan Othman, Ahmad Fauzi Ismail, Tutuk Djoko Kusworo, Anwar Ul-Hamid
Summary: In this study, the performance of membrane distillation (MD) was improved by coating MoS2-TiO2 on a PVDF-based hollow fiber membrane. The MoS2-TiO2/PP20 membrane showed enhanced hydrophobicity and porosity, leading to significantly improved MD performances. This work suggests that the MoS2-TiO2 coating can overcome the typical permeability/rejection rate trade-off effect and play a significant role in enhancing MD performances.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Review
Engineering, Environmental
Nur Fajrina, Norhaniza Yusof, Ahmad Fauzi Ismail, Farhana Aziz, Muhammad Roil Bilad, Meshel Alkahtani
Summary: This article summarizes recent developments in membrane technology tailored for biogas upgrading, including the structure and classification of membrane materials as well as effective approaches to overcome the trade-off between permeability and selectivity. Additionally, other challenges are comprehensively discussed, and future research required to tackle biogas upgrading issues is projected.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Materials Science, Textiles
Ainatul Aqilah Binti Mohd Rashid, Saravana Kumar Jaganathan, Ahmad Zahran Mohd Khudzari, Ahmad Fauzi Ismail
Summary: Nanofibrous dressings made of polycaprolactone (PCL) and green tea have potential advantages in wound management. The fabricated PCL/green tea nanofibrous composites showed smaller fiber morphology and diameter, improved wettability and water uptake compared to pure PCL fibers.
AUTEX RESEARCH JOURNAL
(2022)
Article
Chemistry, Multidisciplinary
Faten Ermala Che Othman, Norhaniza Yusof, Michael Petru, Nik Abdul Hadi Md Nordin, Muhammad Faris Hamid, Ahmad Fauzi Ismail, Ahmad Ilyas Rushdan, Shukur Abu Hassan
Summary: This study demonstrates the fabrication of PEI-graphene-derived rice husk char/activated carbon nanofiber composites and investigates their adsorption performance towards CO2. The results show that the addition of graphene and impregnation with amine enhances the surface area and CO2 uptake of the composites. The adsorption performance is influenced by temperature and pressure. The composites follow the pseudo first-order kinetic model and Langmuir adsorption isotherm model.
NANOTECHNOLOGY REVIEWS
(2022)
Article
Engineering, Chemical
Yunfei Yu, Xue Yang, Chenchen Zhang, Jie Chen, Wei Lin, Jianqiang Meng
Summary: This study reports an environmentally friendly and simple approach for preparing double-network (DN) ion gel membranes with high strength and excellent gas separation performance. By optimizing crosslinking density, mass ratio, and the type and content of free ionic liquid, the mechanical and gas separation properties of the DN membrane are improved.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Si-qi Jiang, Qiang Gao, Xi-guang Li, Chao-zhu Deng, Jun Qiu, Xiang-nan Zhu
Summary: A dual-strengthening pretreatment method is proposed to remove PVDF more efficiently and enhance the leaching of LiCoO2. Experimental results show that dual-strengthening pretreatment can effectively remove PVDF and significantly improve the leaching efficiency compared to single pretreatment methods.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Zengchi Hu, Xiaoyu Wang, Xiaohui Zhang, Xue Li, Jiangbin Xia
Summary: The rapid fabrication of high-performance composite membranes based on CMPs using simple and low-cost methods is challenging. In this study, three CMPs-based composite membranes were rapidly fabricated with adjustable size using unidirectional diffusion synthesis. The microstructural design enhanced the rejection rates of the membranes and they showed strong hydrolytic resistance, thermal stability, and acid-base resistance. Electrostatic adsorption and the adjustable microstructures significantly varied the repellence of the membranes to different charged molecules.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Farzaneh Rouhani, Matineh Ayedi, Nasser Safari
Summary: Introducing defects into porous metal-organic frameworks is important for improving their adsorption performance. Quasi-MOFs, an underutilized variant of large-scale, fundamentally deficient MOFs, have been found to have substantial amounts of unsaturated metal sites to offset the drawbacks of MOFs. In this study, a quasi-MOF was produced using a water-stable MOF and demonstrated significantly improved phosphate adsorption capability due to the presence of defect sites.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Valentin Reungoat, Morad Chadni, Louis M. M. Mouterde, Fanny Brunissen, Florent Allais, Helene Ducatel, Irina Ioannou
Summary: This study focuses on the recovery of sinapic acid using liquid-liquid extraction assisted by a hollow fiber membrane contactor from an aqueous feed obtained through the hydrolysis of mustard bran. The screening of solvents of different chemical nature showed that all tested solvents had an extraction efficiency of more than 80% for pH < 5. Four solvents were selected for use in the hollow fiber membrane contactor, and the volatile solvents showed higher mass transfer coefficients compared to non-volatile solvents. The extraction efficiency was intensified by increasing the initial concentration of sinapic acid and the feed-to-solvent ratio. CPME was found to have optimal recovery efficiency at a phase ratio of 8:1, yielding 0.9 g of sinapic acid per liter of CPME used.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Takahiro Sakamoto, Takafumi Hanada, Hayate Sato, Mayu Kamisono, Masahiro Goto
Summary: The emergence of the battery society has led to a high demand for battery metals, resulting in a strain on their supply. This study introduces a novel technique using a hydrophobic deep eutectic solvent (DES) for leaching and recovering battery metals from low-grade nickel laterite ores. The DES enables selective leaching and recovery of the metals, offering a promising pathway for the extraction of critical battery metals.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Rongrong He, Jiarui Chen, Chunyao Zhang, Dan Lu, Lin Zhang, Tao He
Summary: Researcher has developed a method to quantify the charge density in nanofiltration (NF) membrane separation layer and applied it in NF membranes that can separate Mg2+ and Li+. The results showed that overcompensated amine groups played a major role, and there was a linear relationship between charge density and coating bi-layers or PAH layers.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Zhijian Zhang, Min Chen, Zhe Lin, Zhichao Yang, Yafeng Du, Zhihui Chen, Zhenhao Yang, Kongyin Zhao, Ligang Lin
Summary: Membrane technology plays an important role in molecular/ion separation processes, but faces challenges such as membrane fouling. This study introduces a new ion-crosslinking method to fabricate copper alginate hydrogel membranes with improved mechanical strength and antimicrobial capabilities. The membranes exhibit excellent separation performance and enhanced long-term molecule/ion separation through improved anti-swelling properties. Molecular dynamics simulations and life cycle analysis highlight the pore structure and environmental friendliness of the hydrogel membranes. These findings provide valuable insights for developing sustainable hydrogel membranes with stable performance and high separation efficiency.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Dongmei Liu, Aiying Guo, Yanling Qi, Zhixin Ji, Hongjuan Li, Zhiwei Zhang, Xinyue Zhang, Kunze Wu, Aijun Cai
Summary: In this study, a stable magnetic Mg/Mn-layered double oxide-doped biochar composite (MgMnLDO-MBC) was prepared and successfully used for the removal of antibiotics and bacteria from wastewater. The composite exhibited enhanced surface areas, adsorption sites, and free radicals, leading to improved catalytic activity. The effects of different factors on the removal efficiency were evaluated, and the composite showed good reusability.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Feng Wang, Zhaoyong Bian, Yaru Zhang, Wenchao Yu, Qiang Zhang, Hui Wang
Summary: In this study, a nanofibrous layered structure of Ff-Ti3C2Tx-Co3O4 was prepared by self-assembling nanofibrous Co3O4 with lamellar fluorine-free MXene (Ff-Ti3C2Tx). The Ff-Ti3C2Tx-Co3O4 exhibited excellent catalytic activity for degradation, resistant to ionic interference, and maintained high removal efficiency of sulfamethoxazole (SMX) in municipal wastewater. The rapid SMX degradation involved fast electron transfer in redox cycles with PMS and the generation of 1O2 via PMS ->center dot O2 -> 1O2. This work provides new insights into antibiotic degradation mechanisms and electron transfer based on PMS activation.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Weipeng He, Jiacheng Luo, Yujie Wu, Tianhao Luo, Chen Tang
Summary: This study comparatively evaluated the role of cationic, anionic, and nonionic polyacrylamides (PAMs) in ballasted flocculation of clay suspensions under different aluminum sulfate (AS) coagulant dosages. The selection of PAMs and AS dosage had a significant influence on the size and shear resistance of ballasted floc aggregates.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Lixian Wang, Lizhi Zhao, Didi Si, Zhixin Li, Huiqin An, Hui Ye, Qingping Xin, Hong Li, Yuzhong Zhang
Summary: Metalloporphyrin-based nanozymes integrated with poly (vinylidene fluoride) membrane show high catalytic activity and reusability for the decolorization of Congo Red dye in continuous flow process.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Yongfei Ma, Chenyu Zeng, Yongzhen Ding, Jiayi Tang, Ondrej Masek, Zhikang Deng, Rui Mu, Zulin Zhang
Summary: In this study, sludge-derived biochar (SBC) was functionalized with various iron salts to enhance its adsorption ability for sulfamethoxazole (SMX) and magnetic collection performance. Ball milling was further employed to treat the optimal iron salt functionalized SBC (MSBC), resulting in ball milled SBC (BMSBC) with improved adsorption performance for SMX. The dominant driving mechanism for SMX adsorption onto BMSBC was confirmed to be multiple physicochemical forces, including 7C-7C conjugation, pore filling, H-bonding, Fe-O complexation, and electrostatic interactions. BMSBC exhibited favorable adsorption ability for SMX in actual waters and could be easily collected within 1 min due to its magnetic sensitivity.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Jinglin Tan, Xiaohui Mao, Wenjihao Hu, Hongbo Zeng
Summary: This study investigates the influence of PDMS chain architectures on surface properties and reveals that PDMS coatings with looped structures exhibit superior hydrophobicity, self-cleaning, and water sliding compared to coatings with linear structures. Additionally, both looped and linear PDMS coated stainless steel mesh/polyester fibers show efficient separation of oil/water mixture.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Wei-Liang Chen, Chih-Chia Cheng, Chien-Hsing Lu, Jem-Kun Chen
Summary: This study designs a novel sandwich-structured capacitor that reduces the absorption time of pollutants using dielectrophoresis force. By coating graphene oxide on polystyrene microspheres as adsorbents and encapsulating them within the capacitor, the adsorption rate is significantly enhanced. Additionally, frequency manipulation allows for the recycling of adsorbents and concentration of dyes, minimizing secondary pollution.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)