Article
Biotechnology & Applied Microbiology
Leland M. Vane
Summary: This study investigates the impact of variable membrane permeabilities on predictions of PV/VP system performance. The results show that the variable permeabilities of the membranes significantly alter the required membrane area for water removal from ethanol by PV and the transfer of ethanol to the permeate stream.
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
(2022)
Article
Engineering, Chemical
Yeon-Gyu Lim, Ji-Woong Kim, Chul-U Bak, Young-Deuk Kim
Summary: This study investigated the dehydration performance of vapor permeation (VP) and pervaporation (PV) processes using tubular NaA zeolite membranes experimentally and theoretically. The effects of key operating conditions on the performance of each process were studied, and mathematical models were developed to investigate the separation behavior. The study also proposed and evaluated an integrated system for the purification of volatile organic compounds (VOCs).
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Engineering, Chemical
Fateme Banihashemi, Jerry Y. S. Lin
Summary: This study investigates the influence of xylene activity on the vapor and liquid permeation/separation performance of b-oriented MFI zeolite membranes. The results showed that the permeance and separation factor increase with temperature, but decrease with increasing xylene activity. B-oriented MFI zeolite membranes exhibit better vapor permeation/separation performance compared to randomly oriented membranes, and show less negative effect of xylene activity on separation factor. However, both types of membranes show poor separation factor when operated in the pervaporation mode.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Engineering, Chemical
Norihiro Moriyama, Hiroki Nagasawa, Masakoto Kanezashi, Toshinori Tsuru
Summary: In this study, the relationship among reverse osmosis, pervaporation, and vapor permeation for molecular separation via membranes was formulated and verified through experiments. The model also successfully predicted the permeance of water, methanol, and hydrogen under different pressure levels by considering the effect of concentration in the membrane pores.
CHEMICAL ENGINEERING SCIENCE
(2022)
Article
Biotechnology & Applied Microbiology
Leland Vane, Franklin Alvarez, Vasudevan Namboodiri, Michael Abar
Summary: This study evaluated the performance of commercial-grade CHA and T-type membranes, as well as NaA zeolite membrane, for the dehydration of ethanol. The CHA sample exhibited the highest water permeance and selectivity, while the NaA membrane had slightly lower performance and the T-type membrane had the lowest permeance and selectivity. Performance declined over time, particularly for the NaA membrane. The results of this study are important for the design of solvent dehydration systems.
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
(2022)
Article
Engineering, Chemical
Atsushi Matsuoka, Akihito Otani, Eiji Kamio, Hideto Matsuyama
Summary: Amino acid ionic liquids are used as a CO2 carrier in facilitated transport membranes due to their high CO2 permselectivity, but estimating membrane performance is challenging because of viscosity changes. Investigating potential models to accurately estimate the CO2 permeability of these membranes through simulations can enhance prediction accuracy.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
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)
Article
Engineering, Chemical
Norihiro Moriyama, Hiroki Nagasawa, Masakoto Kanezashi, Toshinori Tsuru
Summary: Subnanoporous organosilica membranes outperform nanoporous membranes in steam recovery at high temperatures, exhibiting higher water permeance, H₂O/N₂ permeance ratio, and maximum water flux. They also demonstrate similar high levels of water permeance for various binary steam/non-condensable gas mixtures.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Review
Environmental Sciences
Dan Ren, Shuping Ren, Yakai Lin, Jianhong Xu, Xiaolin Wang
Summary: Applications of solute purification, solvent recovery, and solvent separation in organic solvents are expanding in chemical industries, pharmaceuticals, and food processing. Membrane separation technology offers fast and efficient separations. Novel materials and preparation methods have enabled the development of organic solvent resistant membranes.
Article
Engineering, Chemical
Jin Du, Shuwei Liang, Meidi Wang, Yuhan Wang, Tianpei Yi, Zhiming Zhang, Fusheng Pan, Zhongyi Jiang
Summary: Cu-TAPB-COF nanosheets were synthesized and introduced into Pebax®2533 matrix to construct facilitated transport membranes for toluene/n-heptane mixtures. The Cu-TAPB-COF nanosheets provided continuous low mass transfer resistance channels and uniformly distributed facilitated transport sites. The resulting membrane exhibited higher adsorption selectivity and lower swelling degree compared with pure Pebax membrane. It showed high pervaporation separation performance for the toluene/n-heptane mixture.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Review
Biochemistry & Molecular Biology
Priyanka Goyal, Subramanian Sundarrajan, Seeram Ramakrishna
Summary: This paper discusses the importance of pervaporation in solvent separation and dehydration, introducing polymer membranes based on PDMS and the role of MOFs such as ZIF in enhancing pervaporation performance. A review of the performance and research methods of ZIF-PDMS membranes is provided, along with suggestions for future research directions.
Article
Engineering, Chemical
Ralph Rolly Gonzales, Noriaki Kato, Hiroki Awaji, Hideto Matsuyama
Summary: In this study, crosslinked polydimethylsiloxane (PDMS) composite membranes were developed for organic solvent separation. The influence of PDMS molecular weight and crosslinking on membrane properties and performance was tested, and it was found that membranes prepared with lower molecular weights of PDMS showed lower permeability and higher separation coefficient. A correlation was observed between the separation coefficient and the difference of chi parameters between alcohol/PDMS and hexane/PDMS.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Engineering, Environmental
Tim Croes, Abhishek Dutta, Robin De Bie, Korneel Van Aelst, Bert Sels, Bart Van der Bruggen
Summary: Organic solvent nanofiltration membranes were used to fractionate birch derived RCF lignin oil. The silicon-based membranes from Borsig and Evonik showed the best performance in separating lignin into different functional fractions, with monomer separation factors up to 7.4 and a permeate fraction with 88% phenolic monomer purity. Furthermore, batch diafiltration and two-stage filtration increased the separation factor to 25.4 and the monomer purity of the permeate to 95%.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Chemical
Rafael C. A. Amarante, Adam A. Donaldson
Summary: Experimental results showed that higher feed composition and temperatures lead to higher ethanol fluxes, but increasing ethanol feed concentration has an inversely proportional effect on selectivity and separation factor.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Engineering, Chemical
Keizo Nakagawa, Shintaro Araya, Kai Ushio, Misato Kunimatsu, Tomohisa Yoshioka, Takuji Shintani, Eiji Kamio, Kuo-Lun Tung, Hideto Matsuyama
Summary: Two-dimensional (2D) laminar membranes are being studied for organic solvent nanofiltration, but controlling interlayer spacing and stable solvent permeation remain challenges. In this study, GO membranes with TEOA crosslinker were found to effectively suppress swelling and the affinity between TEOA and solvents correlated with interlayer spacing, indicating the importance of crosslinker-solvent affinity in controlling membrane performance.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Engineering, Chemical
Huimin Chen, Yangyang Mao, Binyu Mo, Yang Pan, Rong Xu, Wenqi Ji, Guining Chen, Gongping Liu, Wanqin Jin
Summary: A novel design of omniphobic membrane was developed to alleviate wetting phenomenon in membrane distillation process caused by low surface energy contaminants. The membrane was fabricated by plasma treatment and fluoroalkyl grafting of graphene oxide (GO) laminates, resulting in the creation of in-plane nanopores and active sites for fluoroalkyl grafting. The resultant omniphobic membrane exhibited high water flux (approximately 35 kg m-2 h-1) and impressive salt rejection (99.9% for 35 g L-1 NaCl solution with 0.2-0.4 mM sodium dodecyl sulfate) during over 450 hours of direct contact membrane distillation process at 60 degrees C. This work provides a facile strategy to develop high-flux and wetting-resistance materials for membrane distillation.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Engineering, Chemical
Xi Chen, Nana Wang, Guining Chen, Zhenggang Wang, Gongping Liu, Rongfei Zhou, Wanqin Jin
Summary: Mixed-matrix formulation is a promising method to improve the performance of polymer membranes with the incorporation of fillers. In this work, the effect of filler structural integrity on the separation performance of mixed-matrix membranes was explored. Different sizes of SAPO-34 zeolite fillers were incorporated into 6FDA-DAM polyimide and it was found that the micron as-synthesized and submicron as-synthesized fillers enhanced CO2/CH4 separation, while the submicron ground filler decreased CO2 permeability. The balance between structural integrity and crystal size of the filler is crucial for high-performing mixed-matrix membranes.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Engineering, Chemical
Jiangying Liu, Yang Pan, Jingyi Xu, Zhenggang Wang, Haipeng Zhu, Gongping Liu, Jing Zhong, Wanqin Jin
Summary: To achieve high separation efficacy of carbon dioxide, Pebax-based membranes have attracted intensive interest. An amphipathic copolymer polydimethylsiloxane(PDMS)-block-polyethylene oxide(PEO) was introduced into the intermediate layer to tune the interfacial adhesion, enabling fabrication of ultra-thin Pebax composite membrane. The strategy of using the amphipathic copolymer as an intermediate layer enhanced the composite membrane integrity and simplified the plasma pre-treatment, showing great potential in developing highly permeable membrane for efficient CO2 capture.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Engineering, Chemical
Quan Liu, Xian Wang, Yanan Guo, Gongping Liu, Kai-Ge Zhou
Summary: Graphene-based membranes with tunable apertures and functional groups have shown potential in ethanol/water separation. Pristine graphene exhibits reverse-selective behavior due to preferential adsorption for ethanol. Ethanol-permselective process is initiated by ethanol-enriched and water-barren pores. In contrast, hydroxylated graphene membranes prefer water molecules due to molecular sieving and functional-group attraction. The study provides insights into the reverse-selective mechanism of porous graphene membranes and a new avenue for efficient biofuel production.
FRONTIERS OF CHEMICAL SCIENCE AND ENGINEERING
(2023)
Article
Chemistry, Physical
Guozhen Liu, Yanan Guo, Cailing Chen, Yong Lu, Guining Chen, Gongping Liu, Yu Han, Wanqin Jin, Nanping Xu
Summary: A high-probability theoretical coordination strategy is proposed and demonstrated to eliminate lattice defects in metal-organic framework (MOF) membranes. This strategy increases the ratio of ligands to metal clusters, enabling the creation of high-connectivity MOF membranes with angstrom-sized lattice apertures. The resulting membranes exhibit high and stable separation performance for gases, water desalination, and an organic solvent azeotrope.
Article
Engineering, Chemical
Guozhen Liu, Renhao Li, Xi Chen, Long Cheng, Yu Liu, Gongping Liu, Wanqin Jin
Summary: Carbon molecular sieve (CMS) membranes derived from 6FDA-DAM polyimide exhibit improved gas separation efficiency with increasing pyrolysis temperature, leading to densification of the pore structure and enhanced size-sieving effect. Membranes pyrolyzed at higher temperatures are more susceptible to physical aging, but pre-aging treatment can improve and stabilize gas separation performance beyond the upper limit of polymeric membranes. The gas permeation behavior of CMS membranes is dominated by diffusion, making tailoring of gas permeation and physical aging a viable approach to tune their gas transport properties.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Engineering, Chemical
Quan Liu, Minggong Chen, Longlong Sun, Gongping Liu, Rong Xu
Summary: The study investigates the effect of pore density (PPI) on the separations of water/ethanol and methanol/ethanol mixtures through graphene oxide (GO) membranes. It is found that the fluxes of water and methanol linearly increase with PPI due to enhanced diffusivity and reduced permeation barrier. However, large PPIs sacrifice separation factors. The study provides a theoretical basis for designing high-performance GO membranes for ethanol dehydration and methanol recovery.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Multidisciplinary Sciences
Kecheng Guan, Yanan Guo, Zhan Li, Yuandong Jia, Qin Shen, Keizo Nakagawa, Tomohisa Yoshioka, Gongping Liu, Wanqin Jin, Hideto Matsuyama
Summary: In this study, a robust interlayer channel is developed to exclude salt solutes by balancing associated chemistry and confinement stability. Divergent deformation behaviors of membrane nanochannels under different conditions are revealed, and the deformation constraint effectively provides rapid deformation recovery and excellent ion exclusion performance under variable pressure conditions.
NATURE COMMUNICATIONS
(2023)
Article
Biotechnology & Applied Microbiology
Song Liu, Guozhen Liu, Guining Chen, Gongping Liu, Wanqin Jin
Summary: This review article mainly introduces the great potential of 2D material membranes in molecular separation and the challenges and opportunities in their scale-up fabrication. The scalable fabrication methods and their pros and cons are critically reviewed, and the separation performance of large-area 2D material membranes is summarized. Finally, perspectives on the scale-up fabrication of 2D material membranes are provided to the readers.
CURRENT OPINION IN CHEMICAL ENGINEERING
(2023)
Article
Engineering, Chemical
Haonan Yang, Guining Chen, Long Cheng, Yun Liu, Yaxiong Cheng, Huijun Yao, Yu Liu, Gongping Liu, Wanqin Jin
Summary: Graphene oxide (GO) has been recognized as an ideal building block for separation membranes due to its unique laminar structures and tunable physicochemical properties. In this study, swift heavy ion irradiation was used to enhance the gas permeation properties of GO membranes by creating through transport channels. The irradiation process induced disorder regions and nanopores in the laminates, and promoted cross-linking between oxygen-containing groups of GO, resulting in reduced interlayer spacing and enhanced molecular sieving capabilities. The irradiated GO membranes exhibited a significant improvement in hydrogen permeance, surpassing the upper-bound of H2/CO2 performance. This work demonstrates the feasibility of using heavy ion irradiation to create and tune interlayer channels.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Nanoscience & Nanotechnology
Rong Xu, Shixin Cheng, Xu Cheng, Lv Qi, Jing Zhong, Gongping Liu, Meina Huang, Priyanka Wasnik, Qinglong Jiang
Summary: A new strategy is proposed to enhance the performance of hybrid organosilica membranes by in situ carboxyl functionalization. The introduced carboxyl functionalities result in a compact pore structure and improved water affinity, leading to an increased membrane permeability without compromising water/salt selectivity in reverse osmosis. The carboxyl functionalized organosilica membrane also demonstrates high durability during continuous reverse osmosis desalination, showing great potential for environmental and industrial applications as an efficient and robust molecular separation membrane.
ADVANCED COMPOSITES AND HYBRID MATERIALS
(2023)
Review
Chemistry, Multidisciplinary
Guining Chen, Guozhen Liu, Yang Pan, Gongping Liu, Xuehong Gu, Wanqin Jin, Nanping Xu
Summary: This article provides a brief overview of the importance and fabrication approaches of zeolites and metal-organic frameworks (MOFs) as adsorbents and membranes. It explores the separation mechanisms based on pore sizes and the chemical properties of nanochannels and emphasizes the judicious selection and design of zeolites and MOFs for gas separation purposes. Additionally, it discusses the feasibility of zeolites and MOFs for gas separation from adsorption to membrane separation and addresses the challenges and perspectives of this cutting-edge area.
CHEMICAL SOCIETY REVIEWS
(2023)
Article
Chemistry, Multidisciplinary
Guozhen Liu, Zhenggang Wang, Cailing Chen, Jiahui Li, Guangyuan Zhou, Wenqi Ji, Gongping Liu, Wanqin Jin
Summary: Well-intergrown polycrystalline UiO-66 membranes were successfully synthesized under mild synthesis conditions, showing great potential for intensification of esterification reaction with fast water selective transport channels and high solvent dehydration performance.
CHEMICAL COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Yuefeng Duan, Yuhang Huang, Chongqing Wang, Qian Wang, Kai Ge, Zhiyong Lu, Huijie Wang, Jingui Duan, Junfeng Bai, Wanqin Jin
Summary: Researchers have finely tuned a new family of MOFs with carboxylic pincers to separate ethylene and acetylene efficiently, achieving high selectivity and purity of the products. This work provides a novel approach for designing high-performance MOFs by selectively binding small molecular clusters.
Article
Engineering, Chemical
Jiahui Li, Jiali Yu, Guining Chen, Haipeng Zhu, Guozhen Liu, Ying Xie, Gongping Liu, Wanqin Jin
Summary: This review provides a comprehensive overview of the stability considerations associated with MFI zeolite-based membranes. The mechanisms for insufficient stability, strategies to enhance stability, and potential opportunities and challenges are discussed.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
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)