Article
Engineering, Chemical
Yunpeng Shen, Ayan Yao, Jinyang Li, Dan Hua, Kok Bing Tan, Guowu Zhan, Xiaoping Rao
Summary: A novel method using sonication-assisted potassium fulvic acid (PFA) was applied to obtain few or monolayer MXene, which was then integrated into commercial P84 polymeric matrices to fabricate mixed matrix membranes (MMMs) for organic solvent nanofiltration (OSN) applications. The resulting MMMs showed improved ethanol permeability without sacrificing BBR rejection, and exhibited excellent OSN performance in other organic solvents. The dispersive MXene has great potential for practical OSN applications. Rating: 9/10
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Engineering, Chemical
Shunli Wang, Xin Wei, Zhenyuan Li, Yiqun Liu, Haitao Wang, Lei Zou, Dongwei Lu, Faheem Hassan Akhtar, Xinbo Wang, Changjiang Wu, Shuangjiang Luo
Summary: COF-based MMMs have been researched to improve gas and liquid separations, including various COF linkages, COF properties, and selection principles. COF fillers are categorized into 2D COFs and 3D COFs based on the geometric symmetry of building blocks and the dimensions of the covalently connected frameworks.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Chemistry, Physical
Zhenzhen Yang, Tongyu Liu, Song Wang, Hao Chen, Xian Suo, Tao Wang, Bishnu Prasad Thapaliya, De-en Jiang, Ilja Popovs, Sheng Dai
Summary: In this study, a robust CTF membrane with ionic functionalities was successfully fabricated using a sol-gel approach promoted by a superacid. The synthetic pathway developed in this work opens new opportunities in membrane design, fabrication, and application, with the PP-CTF membrane showing significant optical absorption behavior change and the capability to act as pH indicators.
CHEMISTRY OF MATERIALS
(2021)
Article
Engineering, Chemical
Rifan Hardian, Abdulaziz Alammar, Tibor Holtzl, Gyorgy Szekely
Summary: Membrane technologies have shown promise as an energy-efficient alternative for separation processes in various industries. This study focuses on the fabrication of oil and solvent-resistant nanofiltration membranes using cellulose and chitosan blends. The membranes exhibited outstanding separation performance and chemical stability, even in harsh solvents. By adjusting the cellulose-chitosan ratio, the molecular sieving properties of the membranes could be fine-tuned. The membranes also showed biodegradation potential, contributing to the sustainable lifecycle of membranes.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Engineering, Chemical
Qing Fang, Qin Liu, Zongli Xie, Matthew R. Hill, Kaisong Zhang
Summary: A high-performance molybdenum sulfide (MoS2)-poly-trimethylsilylpropyne (PTMSP) nanocomposite membrane was prepared on polysulfone (PSf) for efficient organic solvent recovery. The incorporation of 2D MoS2 nanosheets into PTMSP polymer significantly improved permeability by 47% and retained a high retention rate for solute molecules. The membrane exhibited superior mechanical strength, excellent stability, and precise molecular sieving capability.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Engineering, Environmental
Hossein Mahdavi, Milad Karami
Summary: In this study, mixed matrix membranes were fabricated by incorporating amino-functionalized fumed silica nanoparticles into a chloromethylated polysulfone membrane. The effects of NH2-SiO2 loading and annealing process on the physicochemical properties and separation performance of the membranes were investigated. It was found that the prepared membrane with 2 mg loading of amino-functionalized fumed silica exhibited outstanding separation performance, which was further enhanced after annealing for 40 minutes.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Engineering, Chemical
Hukang Guo, Xiaoyi Xu, Jiaqi Li, Weilin Feng, Mengxiao Zhang, Chuanjie Fang, Liping Zhu
Summary: Membrane technology is crucial for efficient and energy-saving molecular separation. However, current membrane materials face a trade-off between permeability and selectivity. This study presents a microporous nanocomposite membrane with multiple transport channels to enhance solvent permeation.
JOURNAL OF MEMBRANE SCIENCE
(2022)
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
Xiao Xu, Daria Nikolaeva, Yusak Hartanto, Patricia Luis
Summary: Pervaporation competes with conventional separation techniques in various organic liquid separation applications. Metal-organic frameworks (MOFs) have shown potential to be valuable materials for the fabrication of high-performance pervaporation membranes, providing unique properties that enhance the performance of pervaporation processes. This paper examines the current design strategies and developments of MOF-based membranes in pervaporation, as well as provides perspectives for future development in this area.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Engineering, Chemical
Chenran Yang, Shuxuan Li, Xinghua Lv, Honghai Li, Lihui Han, Baowei Su
Summary: A novel thin film nanocomposite (TFN) membrane was successfully fabricated for organic solvent nanofiltration, demonstrating high permeance and excellent separation performance, making it suitable for harsh solvent environments.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Engineering, Chemical
Fadhilah Alduraiei, Sushil Kumar, Jiangtao Liu, Suzana P. Nunes, Gyorgy Szekely
Summary: Covalent organic polymers (COPs) with permanent pores are prepared via non-uniform covalent assembly of organic building blocks, making them suitable for diverse applications. In this study, a rapid synthesis route for COP-based composite membranes was demonstrated using interfacial polymerization. The membranes were prepared directly on a polyacrylonitrile substrate and exhibited good hydrophobicity. The obtained solvent-resistant composite membranes showed high toluene permeance and rejection levels for congo red.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Xiansong Shi, Zhipeng Zhang, Congcong Yin, Xin Zhang, Jianghai Long, Zhe Zhang, Yong Wang
Summary: This article introduces the application of three-dimensional covalent organic framework membranes in organic solvent nanofiltration by designing the membranes through moderated interfacial crystallization. The nanoporous supports act as moderators, allowing the crystallization of the membranes to form sub-nanometer channels with high stability and selectivity. Additionally, the membrane demonstrates excellent practicality in purifying active pharmaceutical ingredients.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Biochemistry & Molecular Biology
Anna Kuzminova, Mariia Dmitrenko, Andrey Zolotarev, Aleksandra Korniak, Daria Poloneeva, Artem Selyutin, Alexei Emeline, Alexey Yushkin, Andrew Foster, Peter Budd, Sergey Ermakov
Summary: Novel nanofiltration membranes based on modified polymer PIM-1 and metal-organic frameworks (MOFs) were developed to increase efficiency in removing heavy metal ions and dyes. The membranes showed improved permeability and were capable of removing and concentrating food dyes and heavy metal ions.
Article
Engineering, Chemical
Farzaneh Radmanesh, Gerrald Bargeman, Nieck E. Benes
Summary: In this study, cyclomatrix polyphosphazene membranes were synthesized through interfacial polymerization on alumina or polyacrylonitrile supports. The potential of alumina-supported thin film composite membranes as organic solvent nanofiltration membranes was confirmed. The resulting membranes showed high rejection rates for methylene blue in various solvents. A polyacrylonitrile-supported membrane was also prepared, showing higher permeance and lower rejection due to the presence of pinholes.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Engineering, Chemical
Eric Ziemann, Arindam Kumar Das, Paramita Manna, Revital Sharon-Gojman, Michal Sela-Adler, Charles Linder, Roni Kasher, Roy Bernstein
Summary: This study presents a facile method to fabricate crosslinked polyethersulfone membranes with remarkable stability in organic solvents. The performance of the membranes can be easily adjusted by controlling the polymer fraction. The weeklong filtration experiment highlights the excellent stability of the membranes.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Chemistry, Physical
Zhongjie Cai, Meng Huang, Jiajun Dai, Guowu Zhan, Fu-li Sun, Gui-Lin Zhuang, Yiying Wang, Pan Tian, Bin Chen, Shafqat Ullah, Jiale Huang, Qingbiao Li
Summary: The synthesis of methanol from CO2 hydrogenation using H2 produced from renewable energy sources is a promising method for carbon neutrality. A Pd/In2O3 catalyst with low Pd loading exhibited high methanol yield, showcasing the importance of metal-support interaction and oxygen vacancy for catalytic activity. This study presents a new strategy for preparing Pd/In2O3 nanocatalysts and elucidates the deactivation mechanism of supported catalysts by integrating characterization results with density functional theory calculations.
Article
Chemistry, Physical
Xinxin Zhang, Jiajun Dai, Jiageng Ding, Kok Bing Tan, Guowu Zhan, Jiale Huang, Qingbiao Li
Summary: In this study, a series of Mn-doped La2CuO4 perovskite catalysts with adjustable electronic structure were prepared to explore the effects of catalyst intrinsic electronic structure evolution on molecular oxygen activation. The results showed that LaMn0.5Cu0.5O3 catalyst exhibited the best propylene oxide selectivity at 150 degrees C. Characterization and DFT calculations revealed that the excellent catalytic performance of LaMn0.5Cu0.5O3 could be attributed to the change of molecular oxygen activation sites from oxygen vacancy active sites on La2CuO4 to Cu active sites on LaMn0.5Cu0.5O3, and the synergistic interaction between manganese and copper that affected the electron density on Cu sites and modulated the activated states of surface adsorbed oxygen species. Crystal band theory was also employed to associate the oxygen vacancy density with the Cu valence state.
CATALYSIS SCIENCE & TECHNOLOGY
(2022)
Article
Engineering, Chemical
Dayuan Zheng, Dan Hua, Xi Cheng, Junyang Pan, Abdul-Rauf Ibrahim, Haiming Hua, Peng Zhang, Xingwen Cha, Kaiji Xu, Guowu Zhan
Summary: In this study, thin-film composite membranes consisting of poly(m-phenyleneisophthalamide) substrate and polyamide active layer were constructed using transition metal ion-assisted interfacial polymerization method. These membranes showed improved performance compared to traditional polyamide membranes in organic solvent nanofiltration, with a thinner polyamide layer and higher permeability. The addition of Co2+ ion also enhanced the membranes' tolerance to organic solvents and long-term stability. This research has great potential and sustainability for practical organic solvent nanofiltration applications.
Article
Chemistry, Physical
Liangliang Zhang, Tingjun Fu, Kun Ren, Yating Han, Ran Wang, Guowu Zhan, Zhong Li
Summary: This study proposes a new strategy to control the alkylation depth by regulating the methanol concentration, leading to stable production of light aromatics. By using a dual bed system and introducing part of the methanol, the toluene selectivity is reduced while the xylene and BTX selectivity are improved.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Chemistry, Physical
Bo Jiang, Mingzhen Huang, Dongren Cai, Kok Bing Tan, Guowu Zhan
Summary: In this study, supported Pt/Co3O4 nanocatalysts for CO oxidation were prepared using a biological template method. It was found that base etching of the pollen template favored the deposition of Co(OH)2 and the formation of Co3O4 after calcination. The Pt/bio-Co3O4-BB supported catalyst, prepared through twice base etching treatments, exhibited excellent catalytic activity, converting CO to CO2 at 70°C. The base treatments promoted the formation of oxygen vacancies and increased the Pt0/Pttotal surface ratio, enhancing CO adsorption.
CATALYSIS COMMUNICATIONS
(2023)
Article
Engineering, Chemical
Lu Long, Kaiji Xu, Kok Bing Tan, Dongren Cai, Yucheng Yang, Shu-Feng Zhou, Guowu Zhan
Summary: This study 3D-printed monolithic agitating paddles with different geometries and investigated their effect on the degradation efficiency of organic dyes. The results showed that the 3D-printed grid with higher cell density exhibited better liquid mixing efficiency and catalytic performance.
CHEMICAL ENGINEERING SCIENCE
(2023)
Article
Engineering, Chemical
Yunpeng Shen, Ayan Yao, Jinyang Li, Dan Hua, Kok Bing Tan, Guowu Zhan, Xiaoping Rao
Summary: A novel method using sonication-assisted potassium fulvic acid (PFA) was applied to obtain few or monolayer MXene, which was then integrated into commercial P84 polymeric matrices to fabricate mixed matrix membranes (MMMs) for organic solvent nanofiltration (OSN) applications. The resulting MMMs showed improved ethanol permeability without sacrificing BBR rejection, and exhibited excellent OSN performance in other organic solvents. The dispersive MXene has great potential for practical OSN applications. Rating: 9/10
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Nanoscience & Nanotechnology
Ayan Yao, Dan Hua, Yiping Hong, Junyang Pan, Xi Cheng, Kok Bing Tan, Guowu Zhan
Summary: In this study, sandwich-like TFC OSN membranes were developed using interfacial polymerization on a polyvinylidene fluoride (PVDF) substrate modified with copper-tetrakis(4-carboxyphenyl)porphyrin (Cu-TCPP) nanosheets. The Cu-TCPP nanosheets served as interlayers to enhance the mechanical strength of the membranes while balancing permeability and selectivity. The membranes showed stable performance in ethanol and were suitable for nanofiltration of Rose bengal mixture and lecithin concentration.
ACS APPLIED NANO MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Mingzhen Huang, Siyuan Hu, Dongren Cai, Guowu Zhan
Summary: Using in-situ doping metal-organic frameworks as precursors, highly dispersed polymetallic oxides were prepared. The study synthesized straw-like W/Cu/Ce trimetallic oxides using phosphotungstic ionic liquid@Ce-based metal-organic frameworks absorbing copper acetylacetonate as precursors. The effect of W content on the catalytic activity for CO oxidation was investigated.
MATERIALS TODAY CHEMISTRY
(2023)
Review
Engineering, Environmental
Kok Bing Tan, Kaiji Xu, Dongren Cai, Jiale Huang, Guowu Zhan
Summary: Bifunctional catalysts containing metal/metal oxide and zeolites have attracted significant attention for their ability to convert CO2 or CO into value-added fuels or chemicals. The integration manner and interaction distance between the two components greatly impact productivity. A rational design approach has been proposed to guide catalyst selection and address existing challenges, as well as potential development of trifunctional catalysts. Recent research highlights the importance of rational design for CO and CO2 hydrogenation, enabling sustainable production of value-added products while mitigating global warming.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Junyang Pan, Dan Hua, Yiping Hong, Xi Cheng, Fangsong Guo, Kok Bing Tan, Ziqi Zhong, Guowu Zhan
Summary: A hybrid photocatalytic membrane (g-C3N4/GO/MCE) was designed by a vacuum-filtration-assisted assembling method, which exhibited excellent photocatalytic activity and photocatalysis-filtration performance. It consisted of g-C3N4 nanosheets as a top layer, GO nanosheets as an interlayer, and MCE as a substrate layer. This membrane showed high permeance, solute removal, and stability under visible-light irradiation, making it promising for wastewater treatment and water purification applications.
CHEMICAL ENGINEERING JOURNAL
(2023)
Review
Chemistry, Physical
Dongren Cai, Yanmei Cai, Kok Bing Tan, Guowu Zhan
Summary: This review systematically summarizes the recent experimental and theoretical studies on indium oxide (In2O3)-based catalysts for thermochemical CO2 hydrogenation to methanol. It reveals that the formation of oxygen vacancies on the In2O3 surface can inhibit side reactions and ensure high selectivity. The catalytic mechanism and strategies to improve catalytic performance are comprehensively explored.
Article
Chemistry, Physical
Ziqi Zhong, Guowu Zhan, Borui Du, Xinxin Lu, Zihang Qin, Jingran Xiao
Summary: This study demonstrates that Ti and Pt co-doping can improve the PEC performance of the a-Fe2O3 photoanode. The best performance is achieved by in-situ Ti ex-situ Pt doping. Ti doping in bulk facilitates charge separation while Pt doping on the surface accelerates charge transfer. However, Ti doping on the surface inhibits charge separation and Pt doping in bulk hinders charge separation and transfer. HCl treatment further improves the performance but can induce lattice defects that hinder the charge transport.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Chemistry, Inorganic & Nuclear
Xingwen Cha, Xueying Wang, Mingzhen Huang, Dongren Cai, Kang Sun, Jianchun Jiang, Shu-feng Zhou, Guowu Zhan
Summary: In this study, different elements (Pr, Cu, or N) doped CeO2 supports were synthesized using Ce-based metal-organic frameworks (MOFs) as precursors via calcination treatment. The obtained CeO2 supports were used to load Pt nanoparticles and showed enhanced catalytic activity for CO oxidation compared to undoped catalysts. Density functional theory calculations with on-site Coulomb interaction correction were performed to provide atomic-scale insights, revealing that element-doped catalysts can reduce the adsorption energies of CO and lower reaction energy barriers.
DALTON TRANSACTIONS
(2023)
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)