Review
Chemistry, Physical
Angela Malara, Antonio Fotia, Emilia Paone, Giulia Serrano
Summary: Contamination by heavy metals is a major environmental concern due to its toxicity and persistence, necessitating the development of efficient analysis methods. Combining electrospun nanofibers with sensitive electrochemical techniques is a novel solution for detecting trace concentrations of heavy metals, providing a promising approach for future research and challenges.
Article
Chemistry, Applied
Yusof A. Y. A. Mohammed, Fuqiu Ma, Lijia Liu, Chunhong Zhang, Hongxing Dong, Qiang Wang
Summary: This study demonstrated the fabrication of a novel composite PVDF/AOPAN using electrospinning technique, which showed excellent adsorption capability for lead, copper, and nickel removal. Additionally, the adsorbent displayed fast kinetics, reaching equilibrium in a short period of time, and exhibited high removal rates even at high metal ion concentrations. The results suggest that PVDF/AOPAN is an effective adsorbent for trace amounts of Pb(II), Cu(II), and Ni(II) removal.
JOURNAL OF POROUS MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Abdeldjalil Moktar, Mortada Daaou, Abdelaziz Bendraoua, Amine Morsli
Summary: The study revealed that the asphaltene/chitosan composite beads had higher adsorption capacity for metal ions compared to asphaltene alone, with a maximum adsorption capacity of 60-80 mg.g(-1). The adsorption capacity followed the order of Cu(II) > Mn(II) > Zn(II), and the adsorption process was best described by pseudo-second-order kinetics.
MATERIALS TODAY COMMUNICATIONS
(2022)
Article
Polymer Science
Tianbiao Wei, Shanqing Huang, Qingyuan Hu, Jue Wang, Zhongzhong Huo, Tongyang Zhu, Chi Wu, Hao Chen
Summary: In this study, a thermoresponsive hybrid hydrogel was synthesized by incorporating a reconstituted lead-binding peptide into the network of poly(N-isopropylacrylamide). The hydrogel showed high selectivity for Pb(II) and could reversibly adsorb and release lead ions. This material has promising applications in environmental remediation.
Article
Polymer Science
Kayee Chan, Kohki Morikawa, Nobuyuki Shibata, Anatoly Zinchenko
Summary: DNA-chitosan hydrogel exhibits efficient adsorption of heavy metal ions and dyes, as well as pharmaceuticals under certain conditions. The hydrogel's multitarget adsorption characteristics make it promising for environmental cleaning applications.
Article
Biochemistry & Molecular Biology
Norhazirah Rosli, Wan Zaireen Nisa Yahya, Mohd Dzul Hakim Wirzal
Summary: Nanostructure adsorbents, specifically nanofiber membranes made of chitosan/PVA blend, were successfully synthesized through electrospinning and functionalization methods to act as potential bio-sorbents for heavy metal ions removal. The synthesized adsorbent showed excellent performance in removing Pb(II) ions from pure heavy metal ions solutions, with a high adsorption capacity and compatibility with the Freundlich isotherm and pseudo-second-order kinetic models.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2022)
Article
Green & Sustainable Science & Technology
Hao Ai, Dan Lei, Menglian Wu, Shasha Li, Kaifeng Du
Summary: Designing and tuning the porous structure of adsorbents is crucial for enhancing adsorptive performance. In this study, a magnetic-induced copolymerization method was used to create an aligned porous structure in the poly(SPS-co.-CTS) monolith. By aligning the macropores, the monolith exhibited low back pressure, low mass transfer resistance, and high adsorptive capacity. The surface hydrophilicity was further improved by introducing activated chitosan onto the porous surface. Detailed physical characterizations revealed the aligned macropores with a center at 5.18 μm, specific surface area of 54 m2 g-1, and large porosity. Batch adsorption experiments confirmed the applicability of the monolith for the removal of Cu2+ and Co2+ ions in wastewater. The results demonstrate that the aligned porous poly(SPS-co.-CTS) monolith shows great potential for wastewater remediation.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Engineering, Environmental
Atefeh Mousavi Anjeh, Seyed Reza Nabavi
Summary: In this study, CS/PA6 composite nanofibers were prepared by electrospinning and the addition of GO improved the performance of the composite nanofibers. The results showed that the addition of GO led to the formation of a spider-web-like structure and improved the Young's modulus and thermal degradation resistance of the nanofibers. Furthermore, the prepared composite nanofibers exhibited good adsorption capacity for lead ions.
JOURNAL OF POLYMERS AND THE ENVIRONMENT
(2022)
Article
Engineering, Chemical
Ranran Wang, Bin Xu, Yun Chen, Xiaoshuang Yin, Ying Liu, Wenzhong Yang
Summary: In this study, rGO/NCDs composites were successfully synthesized for optimizing the preparation process of CDI electrode, exhibiting excellent electrochemical properties and superhydrophilic property. The CDI tests showed that the electrosorption capacity of rGO/25%NCDs electrode was higher, indicating a good removal effect on Pb2+ pollutants.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Chemistry, Applied
Jawza Sh Alnawmasi
Summary: In this study, an ion-imprinting technique was employed to create a lead ion-imprinted sorbent using a derivative of amino-thiol chitosan (Pb-ATCS). The synthetic steps involved amidizing chitosan with 3-Nitro-4-sulfanylbenzoic acid (NSB) units, selectively reducing the -NO2- residues to -NH2, and cross-linking with epichlorohydrin. The resulting sorbent showed a high affinity for Pb (II) ions and a maximum capacity of approximately 300 mg/g.
CARBOHYDRATE POLYMERS
(2023)
Article
Engineering, Environmental
Mostafa R. Abukhadra, Merna Mostafa, May N. Bin Jumah, Nora Al-Khalawi, Reem Saleh Alruhaimi, Yasser F. Salama, Ahmed A. Allam
Summary: In this study, a chitosan/zeolite-A hybrid structure was synthesized and characterized as an effective adsorbent for Cd (II) and As (V) ions. The kinetic and equilibrium studies revealed different adsorption mechanisms for Cd (II) and As (V) ions, with the composite showing promising potential for multiple cycles of decontamination processes.
JOURNAL OF POLYMERS AND THE ENVIRONMENT
(2022)
Article
Engineering, Environmental
Hui Qiu, Wenxiang Ni, Luyang Yang, Qingrui Zhang
Summary: This study investigated the adsorption capabilities of two natural polyphenol-based adsorbents for Pb(II), with TA-Fe-12 showing superior adsorption capacity and selectivity. XPS and FTIR analyses revealed the exceptional adsorption ability of TA-Fe-12 due to strong coordination between Pb(II) and the groups of TA.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Physical
Fatma Dhaouadi, Lotfi Sellaoui, Sonia Taamalli, Florent Louis, Abderrahman El Bakali, Tito Roberto Sant'anna Cadaval Junior, Adrian Bonilla-Petriciolet, Jorge Luiz Marques Junior, Andrei ValleraoIgansi, Tuanny Santos Frantz, Sabrina Frantz Lutke, Guilherme Luiz Dotto, Luiz Antonio De Almeida Pinto, Abdelmottaleb Ben Lamine
Summary: The adsorption mechanism of Fe3+, Al3+, and Cu2+ ions on chitosan films was studied using a heterogeneous monolayer model with two types of binding site at varying temperatures and pH levels. The theoretical results suggested a multi-ionic adsorption process with different contributions from amino and hydroxyl groups, resulting in a wide range of adsorption capacities at saturation. The removal mechanism for Al3+ and Cu2+ ions was found to be exothermic, while the adsorption of Fe3+ ions was endothermic.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Polymer Science
Yiming Zheng, Huihuang Ma, Jie Wang, Chuanjie Fan
Summary: In this study, a composite nanofiber membrane composed of graphene oxide, carboxymethyl chitosan, and polyvinyl alcohol was successfully prepared. The water resistance of the membrane was improved by cross-linking with glutaraldehyde. The membrane showed promising adsorption performance for heavy metals, making it a potential candidate for applications in heavy metal adsorption.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Review
Chemistry, Applied
Mohammad Nazmus Sakib, Abul K. Mallik, Mohammed Mizanur Rahman
Summary: Water pollution is a growing concern due to industrialization and human activities. The use of electrospun nanofibers is increasing rapidly, especially chitosan-based nanofibers, which offer advantages like non-toxicity, biocompatibility, and cost-effectiveness. While chitosan-based nanofibers have been widely used in various biomedical applications, their potential as adsorbents for heavy metals, dyes, and other pollutants is still relatively new and unexplored.
CARBOHYDRATE POLYMER TECHNOLOGIES AND APPLICATIONS
(2021)
Article
Biochemistry & Molecular Biology
Katerina Stepankova, Kadir Ozaltin, Jana Pelkova, Hana Pistekova, Ilkay Karakurt, Simona Kacerova, Marian Lehocky, Petr Humpolicek, Alenka Vesel, Miran Mozetic
Summary: Surface coatings of furcellaran on PET films can significantly improve cell proliferation, especially for embryonic stem cells, thus showing potential for biomedical applications.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Biochemistry & Molecular Biology
Ilkay Karakurt, Kadir Ozaltin, Hana Pistekova, Daniela Vesela, Jonas Michael-Lindhard, Petr Humpolicek, Miran Mozetic, Marian Lehocky
Summary: Over half of the hospital-associated infections worldwide are caused by bacteria cells adhering to biomedical devices and implants. This study focuses on modifying biomaterial surfaces to develop antibacterial properties. By using chitosan and chondroitin sulfate as coating materials on polylactic acid surfaces, the researchers observed improved activity against bacteria strains as well as increased drug loading and release efficiency. Their findings highlight the potential of these coatings in preventing infections and enhancing the effectiveness of drug delivery systems.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Biophysics
Martin Kral, Marcela Dendisova, Pavel Matejka, Jan Svoboda, Ognen Pop-Georgievski
Summary: Polydopamine (PDA) is widely used for protective adhesive layers in biomedical and tribological applications. This study investigates the binding mechanism of PDA to substrates and the influence of deposition time on molecular structure by preparing PDA layers with different deposition times.
COLLOIDS AND SURFACES B-BIOINTERFACES
(2023)
Article
Materials Science, Biomaterials
Rimeh Ismail, Ivana Sedenkova, Jan Svoboda, Miroslava Lukesova, Zuzana Walterova, Elena Tomsik
Summary: A new synthetic method for preparing a sensing layer using PANI films as an ion-to-electron transducer was presented. The sensors showed appropriate reproducibility and rapid response to Fe2+ or Fe3+ ions, even at 37 degrees C. The in situ deposition of chelating agents during acid-assisted polymerization exhibited faster response compared to layer-by-layer deposition. PMeOx/X-1-PANI@FTO and PMeOx/Z(1)-PANI@FTO sensors demonstrated rapid response and are considered promising detection layers for Fe2+ or Fe3+ ions. This system is expected to contribute to the development of advanced bio-sensors for potentiometric detection of iron.
JOURNAL OF MATERIALS CHEMISTRY B
(2023)
Article
Chemistry, Multidisciplinary
Anita Bialkowska, Beata Krzykowska, Iwona Zarzyka, Mohamed Bakar, Vladimir Sedlarik, Miroslava Kovarova, Anna Czerniecka-Kubicka
Summary: This paper presents an attempt to improve the properties of poly(3-hydroxybutyrate) (P3HB) by adding linear aliphatic polyurethane (PU400) and organomodified montmorillonite (MMT)-(Cloisite((R))30B). The hybrid nanobiocomposites were analyzed for their nanostructure, morphology, mechanical properties, and thermal properties. The addition of Cloisite((R))30B and aliphatic polyurethane to the P3HB matrix resulted in a decrease in the degree of crystallinity, an increase in the amorphous phase contents, and improved thermal stability. The best mechanical properties were observed in hybrid nanobiocomposites containing 10 wt.% of aliphatic polyurethane and 1 wt.% of Cloisite((R))30B.
Article
Polymer Science
Jan Svoboda, Niccolo Lusiani, Radoslava Sivkova, Ognen Pop-Georgievski, Ondrej Sedlacek
Summary: This study compares the antifouling properties of water-soluble poly(2-oxazoline) (PAOx) and poly(2-oxazine) (PAOzi) brushes grafted to gold surfaces. The results show that all polymer-modified surfaces have better antifouling properties than bare gold surfaces and analogous PEG coatings. The study suggests that the resistance to protein fouling comes from both surface hydrophilicity and the molecular structural flexibility of the polymer brushes.
MACROMOLECULAR RAPID COMMUNICATIONS
(2023)
Article
Polymer Science
Jaroslav Cisar, Petra Drohsler, Martina Pummerova, Vladimir Sedlarik, David Skoda
Summary: This manuscript presents a comprehensive study on the application of composite materials based on PLA in various fields, especially in food packaging. The research focuses on the preparation of the composite with suitable thermal stability for hot food packaging under semi-industrial conditions. The effects of composition, annealing process, and post-production thermal annealing on the properties of the composite were investigated.
Article
Chemistry, Applied
Radoslava Sivkova, Jan Svoboda, Jiri Panek, Dietmar Appelhans, Ognen Pop-Georgievski
Summary: In this study, a method for initiating atom-transfer radical polymerization of active esters and post-polymerization modification was presented. The obtained active ester brushes showed complete conversion under amidation conditions with various primary amines. The effectiveness of the amidation reaction was studied using various techniques, and the resulting polymer brushes containing fluorophores were analyzed using fluorescent microscopy.
PROGRESS IN ORGANIC COATINGS
(2023)
Article
Chemistry, Multidisciplinary
Paul D. Topham, Raymond J. Boucher, Taihyun Chang, Miroslava Duskova Smrckova, Wesley S. Farrell, Jiasong He, Michael Hess, Wenbing Hu, Helena J. Hutchins-Crawford, Daniel J. Keddie, Peter E. Mallon, Jan Merna, Natalie Stingelin, Adriana Sturcova, Jiri Vohlidal
Summary: In order to supplement the series of Brief Guides issued by International Union of Pure and Applied Chemistry (IUPAC), the first Brief Guide to Polymer Characterization is introduced here. This article serves as a concise overview of characterization methods for polymer science beginners, students, non-specialists, as well as a useful manual for researchers and technicians. Unlike simple low molar mass chemical substances, polymers are composed of non-identical macromolecules that differ from each other mainly in terms of size, shape, and sometimes the arrangement or positioning of atoms within macromolecules. Due to their distinct properties, polymer characterization relies on specialized equipment and techniques. This Brief Guide specifically focuses on the structural characterization of polymers, aiming to provide readers with an initial understanding of commonly used techniques for analyzing these structural aspects.
PURE AND APPLIED CHEMISTRY
(2023)
Article
Chemistry, Organic
Radek Coufal, Zdenek Tosner, Dusan Drahonovsky, Jiri Vohlidal
Summary: In this study, the formation of hemiacetals from pyrazine trifluoromethylketone and four simple alcohols was investigated using quantum chemical calculations and NMR spectroscopy. The energetics of four different mechanistic pathways were computed and compared with kinetic and thermodynamic measurements. The results suggest that hemiacetal formation is facilitated by an assisted proton transfer process through a pseudo eight-membered transition state, which agrees well with experimental observations. Additionally, a newly proposed mechanistic pathway involving a five-membered transition state leading to zwitterionic intermediates was discussed. Direct proton transfer via a pseudo four-membered transition state was found to be energetically unfavorable compared to other pathways. Moreover, it was revealed that the H-transfer process in the formation of hemiacetals cannot be adequately explained by water and alcohol molecules using six-membered transition states.
ORGANIC & BIOMOLECULAR CHEMISTRY
(2023)
Article
Chemistry, Applied
Lucie Havelkova, Bogdana Bashta, Michaela Vankova, Jiri Zednik, Jiri Brus, Jan Svoboda, Alice Vagenknechtova, Jan Sedlacek
Summary: An atom-economic one-step chain-growth coordination homopolymerization providing high yields of functionalized hyper-cross-linked polyacetylenes with a permanent micro/mesoporous texture and a BET area of up to 1062 m2/g is reported. The homopolymerization is highly compatible with the heteroatom groups of the monomers and allows the preparation of well-defined porous networks with a wide spectrum of univalent groups.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Engineering, Environmental
Muhammad Yasir, Hassan Ali, Milan Masar, Fahanwi Asabuwa Ngwabebhoh, Mukarram Zubair, Tomas Sopik, Michal Machovsky, Ivo Kuritka, Vladimir Sedlarik
Summary: Novel PU nanofibers incorporating TiO2/Nd nanoparticles were fabricated by electrospinning for photocatalytic degradation of estriol hormone. These nanofibers showed high porosity and uniform mesh-like structure, with better performance under UV light compared to visible light, fitting well with the pseudo-first-order kinetic model.
JOURNAL OF WATER PROCESS ENGINEERING
(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)
