Article
Engineering, Environmental
Kezhong Wang, Yunfeng Chao, Zhiqi Chen, Sepidar Sayyar, Caiyun Wang, Gordon Wallace
Summary: A facile coaxial wet-spinning method was used to continuously produce hollow graphene fibers with high conductivity and flexibility. The resulting fibers exhibited outstanding electrochemical and mechanical properties, making them promising candidates for use in wearable supercapacitors and electronics.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Dawei Ji, Yifei Gao, Wanning Wang, Haowei Feng, Kaikai Chen, Changfa Xiao
Summary: Poly(vinylidene fluoride) (PVDF) hollow fiber membranes were prepared through melt spinning method with CaCl2 and PEG as composite pore forming agents. The addition of PEG effectively improved the membrane's pore structure and permeation performance, while reducing the water contact angle and liquid entry pressure. The membranes also exhibited good oil/water separation performance.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Polymer Science
Yasser A. Shalabi, Garba O. Yahaya, Seung-Hak Choi, Abdulkarim Alsamah, Ali Hayek
Summary: Researchers are investigating the potential of using polymeric membranes to remove acid gases from natural gas, in order to reduce energy consumption and carbon emissions. Placing a polymeric membrane unit upstream of the amine scrubbing column can reduce energy consumption during the regeneration process. The preparation of hollow fiber polymeric membranes is crucial for industrial implementation in natural gas processing.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Panpan Niu, Hui Mao, Khak Ho Lim, Qingyue Wang, Wen-Jun Wang, Xuan Yang
Summary: Through a specially designed coaxial wet-spinning process, hollow fibers made of cellulose nanofibrils (CNFs) with a tunable diameter and length similar to cotton fibers were prepared. These hollow fibers exhibit superior mechanical properties and 10 times higher water absorption compared to lyocell fibers. This study provides insights into the hierarchical design of natural materials and the assembly of nanoscale building blocks.
Article
Chemistry, Physical
E. Ashley Morris, Ruben Sarabia-Riquelme, Nik Hochstrasser, Jordan Burgess, Anne E. Oberlink, David L. Eaton, Matthew C. Weisenberger
Summary: The study reports on the early development of polyacrylonitrile-derived structural hollow carbon fibers with reduced wall thickness to achieve complete and homogeneous oxidation, thereby avoiding the skin-core structure often observed in commercial carbon fibers. The specific strength and specific modulus of hollow carbon fibers approached the levels of commercial carbon fibers.
Article
Engineering, Environmental
Xianfeng Liu, Zhong Liu, Xueyan Wang, Yuan Gao, Jun Zhang, Tingting Fan, Xin Ning, Seeram Ramakrishna, Yun-Ze Long
Summary: In this study, a robust superhydrophobic nickel hydroxide modified polyacrylonitrile sponge was developed for efficient oil-water separation. The sponge exhibited a distinctive hierarchically layered structure, excellent separation efficiency, and mechanical elasticity. It could efficiently separate both oil-water mixtures and emulsions and showed strong acid/alkali resistance.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Materials Science, Textiles
Rebecca Ruckdashel, Eunkyoung Shim
Summary: This study explores how the geometry of a die influences the dimensions and hollowness of hollow fibers. The results show that die wall thickness has the largest impact on the fiber dimensions and hollowness.
FIBERS AND POLYMERS
(2022)
Article
Polymer Science
Soon-Chien Lu, Thakorn Wichidit, Thanitporn Narkkun, Kuo-Lun Tung, Kajornsak Faungnawakij, Chalida Klaysom
Summary: Aminosilane functionalization is used to improve the dispersion and adhesion of nano-sized zeolite Y (ZeY) particles in polyether block amide (Pebax). The addition of 5 wt.% of aminosilane-modified zeolite Y (Mo-ZeY) enhances the gas permeability and CO2/CH4 separation factor of Pebax mixed matrix composite hollow fiber membranes by over 100% and 35% respectively.
Article
Materials Science, Textiles
Hongbin Li, Wenying Shi, Haixia Zhang, Xiaohong Qin
Summary: This study fabricated PPTA/PVDF hollow fiber blend membranes with enhanced hydrophilicity and mechanical strength through the dry-wet spinning technique. The effects of spinning conditions on the structure and properties of the membranes, including separation properties, surface hydrophilicity, and mechanical properties, were investigated. Different spinning conditions resulted in improvements in surface hydrophilicity and tensile properties of the blend membranes compared to pure PVDF membranes.
JOURNAL OF INDUSTRIAL TEXTILES
(2021)
Article
Chemistry, Physical
Zhigang Jia, Cong Han, Lianyong Wu, Daqin Zhang, Min Li
Summary: Silicate is a fundamental constituent of minerals with interesting properties. In this study, hollow nickel silicate fibers were synthesized using cotton fiber as a versatile biotemplate. The fibers exhibited rich hydroxyl groups and mesoporous structures, and showed excellent adsorption performance for methylene blue and congo red dyes. Furthermore, the fibers selectively adsorbed anionic dyes containing N group from mixed anionic pollutant solutions.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Biochemistry & Molecular Biology
Yu-Ting Lin, Ming-Yen Wey, Hui-Hsin Tseng
Summary: This study reported the fabrication of MMHFM by incorporating alumina particles into a PEI polymer matrix and investigated its gas separation performance. The synthesized membrane exhibited remarkable hydrogen permeance and high separation factors, making it a promising candidate for hydrogen separation based on comparisons with other reported studies.
Article
Engineering, Chemical
Heseong An, Wonho Jung, Ju Ho Shin, Min Chang Shin, Jung Hoon Park, Jinwon Lee, Jong Suk Lee
Summary: We developed mixed matrix hollow fiber membranes (MMHFMs) for CO2 separation using a dip coating process. By using a γ-alumina interlayer and a co-solvent, we achieved a thin defect-free selective layer with superior CO2 separation performance. The introduced TAZIF-8 MMHFM can improve the total energy demand for post-combustion CO2 capture in a dual-stage membrane process. Our study provides significant progress toward industrial application.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Engineering, Chemical
Dinglei Zhong, Jiemei Zhou, Yong Wang
Summary: The novel selective swelling strategy has been extended to the preparation of HFMs for the first time, allowing for tunable wall thicknesses, pore sizes and good separation performances. HFMs exhibit advantages in water permeance and tensile strength, and their performances can be further enhanced by optimizing hollow fiber geometries and pore structures.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Polymer Science
Shahidah Zakariya, Yin Fong Yeong, Norwahyu Jusoh, Lian See Tan
Summary: In this study, composite membranes composed of NH2-MIL-125(Ti)/PEBAX coated on PDMS/PSf were prepared and their gas separation performance for high CO2 feed gas was investigated. The results showed that the CO2 concentration and feed gas pressure significantly influenced the permeance and selectivity of the membranes.
Article
Engineering, Chemical
Peng Ge, Zhen Lin, Jiarui Yang, Chuan Hu, Qinglin Liu, Qiugen Zhang
Summary: This article presents a facile strategy to fabricate polyethylenimine-grafted polyethersulfone hollow fiber membranes (PSF-PEI HFMs) for efficient dye separation. Unlike traditional interfacial polymerization, these HFMs were directly prepared via quaternization of PEI with brominated polyethersulfone UF HFMs. The PSF-PEI HFMs exhibit ultra-high water permeance and outstanding rejection for dyes, while maintaining low rejections for inorganic salts. Additionally, they show excellent stability and antifouling abilities, making them highly promising for industrial applications in fast dye separation.
JOURNAL OF MEMBRANE SCIENCE
(2023)
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
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, Multidisciplinary
Erna Yuliwaty, Ahmad Fauzi Ismail, Goh Pei Sean, Sri Martini
Summary: A PVDF-based mixed matrix membrane (PVDF- MMM) has been developed for POME treatment. Addition of TiO2 particles increased the hydrophilicity of the membranes. The air gap length influenced the membrane pore size and surface roughness. Aeration improved the turbulence and flux, reducing membrane fouling. The PVDF-based MMM demonstrated good performance for POME treatment.
JURNAL TEKNOLOGI-SCIENCES & ENGINEERING
(2022)
Article
Chemistry, Multidisciplinary
Zahra Samavati, Alireza Samavati, Ahmad Fauzi Ismail, Tohid N. Borhani, Mohammad Velashjerdi, B. Ghasem Eisaabadi, Amir Rostami, Mohd Hafiz Dzarfan Othman, Asmahani Awang
Summary: The study found that using vertically oriented zinc oxide nanorods as photo-anodes significantly improves the photovoltaic efficiency of organic solar cells, including increasing the open-circuit voltage and conversion performance. Additionally, the vertical nanorod structure facilitates electron mobility and oxygen reduction electro-catalytic action, reducing charge-transfer resistance and improving cell performance. This research contributes to sustainable electricity generation by reducing the reliance on non-renewable energy sources.
JOURNAL OF NANOSTRUCTURE IN CHEMISTRY
(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)