Review
Engineering, Chemical
Ting Xiao, Zehua Zhu, Lucheng Li, Jingxin Shi, Zhenxuan Li, Xiaojun Zuo
Summary: This review analyzes and compares the membrane fouling and cleaning strategies in MF/UF and DM systems, discussing the influence of factors such as membrane pore size, material, reactor configuration, and hydrophobicity on membrane fouling. Different cleaning strategies are summarized and implications for sustainable development in water and wastewater treatment are presented. This review attempts to bridge the connections between MF/UF and DM, providing new insights for fouling control and improved efficiency.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Engineering, Environmental
Zhan Wang, Yangyang Guo, Zhaoyu Qiao
Summary: Understanding the hydraulic cleaning mechanism of membrane fouled with activated sludge and establishing a flux predictive model can effectively improve cleaning efficiency in MBR. The proposed model, which considers various mechanisms, showed better accuracy and performance compared to other models when applied to different types of fouled membranes.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Engineering, Chemical
Jiachen Mo, Tao Lin, Wei Liu, Zhengbin Zhang, Yong Yan
Summary: This study discussed the causes of membrane pollution and evaluated the purification effects of sodium hypochlorite, different aeration methods, and different dosages of ozone as cleaning agents on ceramic membranes. Results showed that ozone micro-nano-bubbles (O3-MNBs) had excellent cleaning efficiency, achieving a 100% flux recovery rate in a short time. O3-MNBs not only significantly improved cleaning efficiency but also reduced the negative environmental impact of chemical agents.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Environmental Sciences
Alejandro Caballero, Pablo Caballero, Federico Leon, Bruno Rodriguez-Morgado, Luis Martin, Juan Parrado, Jenifer Vaswani, Alejandro Ramos-Martin
Summary: The study demonstrates a new technology that converts problematic cheese whey into valuable products, achieving zero waste through membrane separation, and obtaining products with commercial utility.
Article
Biotechnology & Applied Microbiology
Santhana Krishnan, Mohd Nasrullah, Hesam Kamyab, Noor Suzana, Mimi Sakinah Ab Munaim, Zularisam Ab Wahid, Ismat H. Ali, Reza Salehi, Sumate Chaiprapat
Summary: This study focuses on the separation of xylose reductase (XR) enzyme using a cross-flow ultrafiltration (UF) membrane and investigates the effect of operating parameters and membrane cleaning techniques on the separation performance. The research findings indicate that increasing transmembrane pressure improves the separation efficiency but also leads to fouling and polarization. On the other hand, increasing cross-flow velocity is more effective in fouling control. Moreover, cleaning the membrane surface with an alkaline solution containing 0.1 M sodium hydroxide effectively removes foulants and increases flux recovery.
BIOPROCESS AND BIOSYSTEMS ENGINEERING
(2022)
Article
Chemistry, Multidisciplinary
Jiaqi Ding, Haoliang Xiao, Xiaolong Huang, Yujia Zou, Zhimin Ye, Songlin Wang, Pengchao Xie, Yongsheng Chen, Jun Ma
Summary: This study proposes a novel heat-activated peroxydisulfate (heat/PDS) process for cleaning membrane fouling caused by humic acid (HA). The combination of heat and PDS can achieve almost 100% recovery of permeate flux by changing the HA structure and enhancing foulant detachment from membranes. The properties of treated membranes are characterized, and the results demonstrate the effective removal of reversible and irreversible foulants by heat/PDS cleaning. The heat/PDS method shows comparable performance to NaClO in membrane cleaning and provides high performance in removing fouling caused by different substances, suggesting its potential as an alternative for practical membrane cleaning.
CHINESE CHEMICAL LETTERS
(2023)
Article
Environmental Sciences
Hojung Rho, Sangwon Kim, Jaegwan Shin, Jaeweon Cho, Yong-Gu Lee, Kangmin Chon
Summary: The cleaning efficiencies of fouled multibore ultrafiltration membrane (UFMB) were investigated using two different cleaning solutions. The results showed that the type of cleaning agent played a critical role in the cleaning efficiency. Cleaning sequence 1 (CS-1) was more effective in extracting the foulants on the UFMB surfaces compared to cleaning sequence 2 (CS-2). Overall, the study demonstrated that the cleaning sequence strategy significantly influenced the restoration of UFMB performance.
Article
Food Science & Technology
Mustafa Satouf
Summary: The objective of this study is to evaluate the effect of adding two types of cheese whey on the properties of Syrian bread. The addition of 25% whey or 50% whey concentrate improved dough stability and resulted in higher protein content. The sensory analysis showed that the bread with whey had the highest overall acceptability scores.
JOURNAL OF FOOD SCIENCE AND TECHNOLOGY-MYSORE
(2023)
Article
Engineering, Environmental
Shihao Zhou, Junwen Zhu, Zunrui Wang, Zhen Yang, Weiben Yang, Zhonglong Yin
Summary: A novel anodic membrane has been developed for the coupling of electro-oxidation and membrane filtration process in municipal wastewater reclamation. This membrane demonstrates excellent anti-fouling and self-cleaning abilities, efficient removal of antibiotics and bactericidal efficiency without the need for chemical reagents. It also presents excellent stability, separation performance and low energy consumption, providing a promising solution for wastewater reclamation.
Article
Engineering, Chemical
Marie Enfrin, Cyril Hachemi, L. Damien Callahan, Judy Lee, F. Ludovic Dum
Summary: This study investigated the fouling of ultrafiltration membranes by a mixed system of poly(ethylene terephthalate) nanofibres and organic contaminants commonly found in textile industry effluents before developing mitigation strategies based on periodic gas scouring. Organic contaminants were found to induce a significant decline in water flux across the membranes, while the presence of pure fibres contributed to a smaller permeation loss. Although periodic gas scouring was not efficient in removing organic contaminants from the pores, it successfully removed a significant portion of nanofibres from the membrane surface.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Engineering, Chemical
Patrick Dutournie, Liva Dzene, Arnaud Ponche, T. Jean Daou, Sebastien Deon
Summary: This study investigates the specific interactions between titania membrane and fluoride anions during ultrafiltration operation. Numerical investigations show that at low concentrations, the transmission of fluoride-based salts decreases due to a modification of the electric charge of the membrane surface caused by fluoride ions. This modification can be explained by the substitution of oxygen atom with a fluoride ion.
Article
Engineering, Chemical
Mohamed Aslam, Filicia Wicaksana, Mohammed Farid, Anthony Wong, William B. Krantz
Summary: In this study, a transient back-pressure (water hammer) was applied to mitigate fouling in ultrafiltration of whey proteins. The water hammer effect was effective in reducing membrane fouling, with up to 84% flux enhancement achievable depending on operating conditions. However, the effectiveness of water hammer decreased at high transmembrane pressures and high feed concentrations where fouling was more severe.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Review
Engineering, Environmental
Christian D. Peters, Tony Rantissi, Vitaly Gitis, Nicholas P. Hankins
Summary: Natural organic matter (NOM) is a common issue in water treatment systems, which can be removed through early-stage membrane processes like ultrafiltration (UF) but may lead to UF membrane fouling. Recent studies have focused on enhancing NOM retention and mitigating membrane fouling in UF systems. Multi-process solutions are considered the most promising approach for addressing these challenges.
JOURNAL OF WATER PROCESS ENGINEERING
(2021)
Article
Biochemistry & Molecular Biology
Zeyuan Gao, Qiuying Chen, Xiaolan Song, Jingwei Wang, Weiwei Cai
Summary: This study investigates the microbial responses to different types of chemical cleaning agents in an ultrafiltration system, filling a knowledge gap in this field. The results show that certain cleaning agents can affect the microbial properties and attachment on the membrane surface.
Article
Engineering, Chemical
Mengying Yang, Pejman Hadi, Xuechen Yin, Jason Yu, Xiangyu Huang, Hongyang Ma, Harold Walker, Benjamin S. Hsiao
Summary: A unique class of low fouling nanocellulose-enabled thin film nanofibrous composite ultrafiltration membranes were fabricated, showing excellent permeation flux, high rejection ratio, and good antifouling tendency against bovine serum albumin. The use of charged CNF as a barrier layer demonstrated practicality in antifouling ultrafiltration membranes for wastewater treatment, outperforming commercial PVDF UF membranes.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Materials Science, Ceramics
Maria-Jose Sanchez-Rivera, Maria Jose Orts, Valentin Perez-Herranz, Sergio Mestre
Summary: Tin oxide is a widely studied semiconductor material with high conductivity and corrosion resistance. This research investigates the sintering behavior of SnO2-based powder with the addition of Li2CO3 as a sintering aid. The study analyzes the effects of the amount of sintering aid and thermal treatment parameters on densification.
BOLETIN DE LA SOCIEDAD ESPANOLA DE CERAMICA Y VIDRIO
(2023)
Article
Engineering, Environmental
Magdalena Cifuentes-Cabezas, Claudia F. Galinha, Joao G. Crespo, Maria Cinta Vincent-Vela, Jose Antonio Mendoza-Roca, Silvia Alvarez-Blanco
Summary: The presented work aims to solve the problem of large volumes of oil mill wastewater and proposes nanofiltration as a possible second stage treatment. Different membranes were tested and it was found that the NF270 membrane under specific conditions showed the best concentration of phenolic compounds with high permeate flux and low fouling. Furthermore, spectroscopic techniques were used to study membrane fouling and effectiveness of cleaning protocols.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Environmental Sciences
C. Domingo-Torner, M. Garcia-Gabaldon, M. C. Marti-Calatayud, S. Mestre, V. perez-Herranz
Summary: Advanced Oxidation Processes are efficient for removing organic pollutants from wastewaters. This study characterized a ceramic electrode with a photocatalytic layer, BiFeO3, and tested it for norfloxacin oxidation with and without light. The electrode's photoactivity was significantly enhanced by BiFeO3, resulting in higher mineralization of norfloxacin under light conditions. The oxidation pathway of norfloxacin was proposed based on analysis of oxidation byproducts. The study also analyzed reactor performance indicators and showed that lower current densities and light improved current efficiency and energy consumption.
Article
Engineering, Chemical
Carmen M. Sanchez-Arevalo, Tim Croes, Bart Van der Bruggen, Maria Cinta Vincent-Vela, Silvia Alvarez-Blanco
Summary: Organic-solvent nanofiltration (OSN) has been used to purify and fractionate phenolic compounds in wet olive pomace. Nine commercial OSN membranes were tested, and DuraMem (R) 500, NFX, and NF270 membranes showed satisfactory permeate flux values. Contact angle measurements and AFM analysis provided insight into the interaction between the ethanol/water solution and the membranes. Liquid chromatography coupled to mass spectrometry and/or refractive index detector confirmed low rejection of the target phenolic compounds (less than 10% for hydroxytyrosol) and high rejection of undesired compounds.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Environmental Sciences
Eduardo Henrique Rotta, Manuel Cesar Marti-Calatayud, Valentin Perez-Herranz, Andrea Moura Bernardes
Summary: Electrodialysis is an innovative technique for phosphates recovery from municipal wastewater. This study investigated the dependency of chemical reactions during ion transport on initial pH and concentration using a heterogeneous anion-exchange membrane. The results showed that different pH and concentration conditions affected the system's characteristics, leading to variations in limiting current density and the appearance of Gerischer arcs in electrochemical impedance spectroscopy spectra. The obtained findings are expected to contribute to the utilization of electrodialysis in phosphates recovery under various environmental conditions.
Article
Biochemistry & Molecular Biology
Carmen M. Sanchez-Arevalo, Ane Perez Garcia-Serrano, Maria Cinta Vincent-Vela, Silvia Alvarez-Blanco
Summary: Despite concerns about the environmental impact of wet olive pomace, it actually contains valuable phenolic compounds that can be recovered. This study proposes an integrated process involving ultrasound-assisted extraction, followed by filtration. Different commercial membranes were tested, and satisfactory results were obtained with the UP005 membrane, which provided efficient purification and high permeate flux. Finally, a nanofiltration process using the NF270 membrane achieved the concentration of the purified polyphenols.
Article
Food Science & Technology
Magdalena Cifuentes-Cabezas, Jose Luis Bohorquez-Zurita, Sandra Gil-Herrero, Maria Cinta Vincent-Vela, Jose Antonio Mendoza-Roca, Silvia Alvarez-Blanco
Summary: This study focused on the effect of transmembrane pressure and cross flow velocity on the permeate flux of different ultrafiltration membranes for the treatment of olive mill wastewater. Semi-empirical models, statistical methods, and machine learning techniques were used. The series resistance model and combined model accurately represented the experimental data, indicating the contributions of cake layer formation and pore blockage to membrane fouling. Inorganic membranes showed a higher tendency for irreversible fouling. Response surface methodology and artificial neural networks were effective in analyzing the significant variables and their impacts. The study provides a better understanding of the data modeling of different ultrafiltration membranes for olive mill wastewater treatment.
FOOD AND BIOPROCESS TECHNOLOGY
(2023)
Article
Biotechnology & Applied Microbiology
Magdalena Cifuentes-Cabezas, Alessio Pavani, Maria Cinta Vincent-Vela, Jose Antonio Mendoza-Roca, Silvia Alvarez-Blanco
Summary: The olive industry generates a large volume of oil mill wastewater (OMW) and table olive wastewater (TOW), which have high concentrations of organic matter, phenolic compounds, and conductivity. Proper management of these wastewaters is crucial due to their toxic impacts on the environment. Forward osmosis (FO) process was tested to concentrate phenolic compounds for recovery, and two membranes (OsmoF2OTM and HFFO.6) were evaluated. Both membranes demonstrated effective concentration of phenolic compounds with acceptable volume reduction. FO shows promise for concentrating phenolic compounds from OOWW and diluting FTOP simultaneously.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2023)
Article
Biochemistry & Molecular Biology
Kayo Santana Barros, Monica Carvalheira, Bruno Costa Marreiros, Maria Ascensao M. Reis, Joao Goulao Crespo, Valentin Perez-Herranz, Svetlozar Velizarov
Summary: For the production of polyhydroxyalkanoates (PHA) using nitrogen-rich feedstocks, the typical strategy of restricting cell growth by nitrogen limitation is not applicable. In this study, Donnan dialysis was evaluated as an alternative method to remove excess nitrogen ions by separating ammonium ions from volatile fatty acids in the media. The use of Fumasep and Ralex membranes showed better performance in terms of ammonium extraction compared to Ionsep.
Article
Biochemistry & Molecular Biology
Lorena Hernandez-Perez, Manuel Cesar Marti-Calatayud, Maria Teresa Montanes, Valentin Perez-Herranz
Summary: The use of electrodialysis (ED) has expanded in recent years with the investigation of new modes of operation. Overlimiting currents in ED involve electroconvection and the generation of vortices, which enhance the mixing process and improve ion transport across membranes. This study applies frequency analysis to investigate the interaction of different parameters on the development of electroconvection near anion-exchange membranes, providing insights for the development of ED systems with desired electroconvection. Chronopotentiometric curves and Fast Fourier Transform analysis are used to study transmembrane voltage oscillations. The results show diverse behaviors depending on forced convection level and current density, and the synergistic effect of forced convection and overlimiting currents increases signal amplitude, particularly at frequencies around 0.1 Hz. Fast Fourier Transform analysis identifies the conditions that lead to a transition between stable and chaotic electroconvection modes in a given system.
Article
Biochemistry & Molecular Biology
Magdalena Cifuentes-Cabezas, Silvia Alvarez-Blanco, Jose Antonio Mendoza-Roca, Maria Cinta Vincent-Vela, Jose M. Gozalvez-Zafrilla
Summary: Understanding the dynamics of agent interaction is crucial for the operation and design of industrial wastewater management processes. This study developed a theoretical model to predict water flux in two different membranes using a sodium chloride solution as the draw solution. The model considered the contribution of organic compounds to osmotic pressure, as well as the membrane characteristics and module geometry. The results showed variations in flux prediction based on the membrane type, feed solution, and draw solution, with a greater influence of phenolic compounds observed in the cellulose triacetate membrane.
Article
Engineering, Environmental
L. Hernandez-Perez, J. Carrillo-Abad, E. M. Ortega, V Perez-Herranz, M. T. Montanes, M. C. Marti-Calatayud
Summary: Antimony is commonly found as an impurity in wastewaters generated in copper metallurgy. This study investigated the recovery of antimony from these wastewaters using voltammetric and electrodeposition tests. The results showed that the deposition of antimony is a mass transfer-controlled process and that an increase in hydrochloric acid concentration improves the deposition of antimony. The use of a rotating disk electrode also enhanced the current density and rate of antimony deposition.
JOURNAL OF ENVIRONMENTAL CHEMICAL 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)
