Article
Environmental Sciences
Punika Maneewan, Warayuth Sajomsang, Sudkanueng Singto, Jenyuk Lohwacharin, Benjaporn Boonchayaanant Suwannasilp
Summary: This study modified the surface of PVDF ultrafiltration membranes with tannic acid (TA) and Cu (II) to reduce membrane fouling in AnMBRs, showing that modifying membranes with a certain antibacterial property could improve performance and reduce irreversible fouling.
ENVIRONMENTAL POLLUTION
(2021)
Article
Engineering, Chemical
Qunhui Hu, Yongjie Yuan, Zhonghuan Wu, Hongwei Lu, Nanwen Li, Hailiang Zhang
Summary: This study developed surface modified TFC RO membranes and investigated the effect of different types of ionic groups on membrane fouling and scaling performances. The modified membranes showed improved hydrophilicity and changed zeta potential compared to the pristine membrane. The research provides insights for the development of anti-fouling and anti-scaling membranes.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Biochemistry & Molecular Biology
Mohammad T. Alresheedi
Summary: Humic, protein, and polysaccharide substances are important foulants in membrane systems, but little attention has been paid to the fouling and cleaning behavior of proteins with inorganic colloids in UF membranes. This study found that the combination of bovine serum albumin (BSA) and sodium alginate (SA) with silicon dioxide (SiO2) and a-aluminum oxide (Al2O3) caused higher irreversibility in membrane fouling. The fouling mechanism shifted from cake filtration to complete pore blocking when the combined organics and inorganics were present in water.
Article
Engineering, Chemical
Nan Li, Tian-Jiao Lou, Wenyi Wang, Min Li, Zhi-Xian Yang, Ru-Yu Chang, Jianxin Li, Hong-Zhang Geng
Summary: The appearance of composite membranes offers a new approach for reducing membrane fouling. In this study, polyaniline (PANI) and Ti3C2Tx (MXene) were combined using electrostatic assembly to create a conductive network and adjust the distance between MXene layers. The resulting MXene-PANI/PES membrane exhibited significantly improved permeation flux and retention rates compared to a regular PES membrane, while also demonstrating enhanced conductivity and anti-fouling capabilities.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Engineering, Chemical
Min Hu, Lina Zhao, Ningbo Yu, Ziqi Tian, Zhonglong Yin, Zhen Yang, Weiben Yang, Nigel J. D. Graham
Summary: The study introduced a strategy for fouling mitigation in ultrafiltration (UF) water treatment by applying an ultra-low concentration of moderately-hydrophobic chitosan (MHC) and using a mildly elevated backwash temperature. The MHC-based UF system showed superior performance under optimal conditions, reducing reversible fouling by approximately 55% and irreversible fouling by about 80%, while also improving effluent quality. The additional cost of MHC dosing and backwash water heating was estimated to be low, making the MHC-based process a potential feasible and cost-effective approach for UF fouling control.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Green & Sustainable Science & Technology
Esperanza M. Garcia-Castello, Antonio D. Rodriguez-Lopez, Sergio Barredo-Damas, Alicia Iborra-Clar, Jairo Pascual-Garrido, Maria Isabel Iborra-Clar
Summary: Consumers are increasingly aware of the importance of incorporating functional and nutritional foods into their diet, leading to a higher demand for protein and peptide-rich food extracts. Soy protein and its derivatives are particularly emphasized in this trend. Ultrafiltration membranes are used for protein fractionation and concentration, but membrane fouling remains a key limitation caused by the accumulation of macromolecules near the membrane surface.
Article
Polymer Science
Tatiana Plisko, Katsiaryna Burts, Anastasia Penkova, Mariia Dmitrenko, Anna Kuzminova, Sergey Ermakov, Alexandr Bildyukevich
Summary: Membrane fouling is a serious issue in membrane technology that can be reduced by the technique of membrane modification through the addition of hydrophilic polymers or polyelectrolytes. This study systematically investigated the effect of different molecular weights of polyacrylic acid (PAA) on the structure and properties of polysulfone membranes. It was found that higher molecular weight PAA resulted in membranes with smaller pore size, higher hydrophilicity, and better antifouling performance. The addition of PAA also led to a decrease in water contact angle and an increase in rejection for humic acid solutions.
Article
Engineering, Environmental
Eunjoo Koh, Nahyun Cho, Hee Min Park, Yong Taek Lee
Summary: In this study, chemically modified polyvinylidene fluoride (PVDF) hollow fiber membranes with anionic-hydrophilic and hydrophobic materials exhibited excellent properties for separating bacteria and particles. The modified membranes showed high fouling resistance and a higher protein recovery ratio compared to the pristine membrane. The developed membranes can be applied in biopharmaceutical production and removal of proteins, retro viruses, and bacteria.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Article
Engineering, Chemical
Tianyu Liu, Dandan Chen, Ya Cao, Feng Yang, Jinyao Chen, Jian Kang, Ruizhang Xu, Ming Xiang
Summary: A new kind of anti-fouling ultrafiltration composite membrane was fabricated in this research, showing superior fouling resistance and permeability for long-term operation. Results demonstrated that the composite membrane performed better in retaining BSA compared to conventional polysulfone membranes.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Environmental Sciences
Xianghao Meng, Duoji Luosang, Shujuan Meng, Rui Wang, Wenhong Fan, Dawei Liang, Xiaohu Li, Qian Zhao, Linyan Yang
Summary: The spatial configuration of polysaccharide foulant is significant in membrane fouling, controlling the resistance of gel layer formed on the membrane. Polysaccharides with different properties show distinct fouling mechanisms in accordance with Hermia's models. Cations may change the interaction of polysaccharide foulant, leading to structural changes in the gel layer.
Article
Environmental Sciences
Jinchuan Lian, Xiaoxiang Cheng, Xuewu Zhu, Xinsheng Luo, Jingtao Xu, Fengxun Tan, Daoji Wu, Heng Liang
Summary: In this study, ferrate (Fe(VI)) and calcium sulfite (CaSO3) were combined to improve ultrafiltration (UF) performance in surface water treatment. The combination of Fe(VI) and CaSO3 generated various active species, effectively eliminating fluorescent components. Dissolved organic carbon and UV254 were significantly reduced with Fe(VI)/CaSO3 = 0.05/0.15 mM. After UF, the removal rate for these parameters were further improved. The UF stage also resulted in reduced fouling and improved membrane performance.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Engineering, Chemical
Yahan Ye, Qing Han, Chen Zhao, Wei Ke, Minghui Qiu, Xianfu Chen, Yiqun Fan
Summary: In this study, a negative ZrO2 tubular ceramic membrane was modified by grafting polyacrylic acid (PAA) to mitigate protein fouling. The modified membrane showed higher stable normalized flux and flux recovery ratio, indicating improved protein-resistant and easy-cleaning performance.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Environmental Sciences
Zhihong Wang, Zekun Wu, Xujun Zhi, Tianfu Tu, Jinxu Nie, Xing Du, Yunlong Luo
Summary: This study evaluated a modified attapulgite-based adsorbent for dyeing wastewater treatment, which showed improved hydrophobicity and increased specific surface area after modification. When applied to the adsorption of Congo red solution, the adsorbent demonstrated high efficiency of 97.6% at a dosage of 0.5 g/L. Additionally, the combination of adsorption and ultrafiltration achieved 99% Congo red removal and reduced membrane fouling.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Polymer Science
Iva Curic, Davor Dolar, Josip Horvat, Katia Grgic
Summary: The influence of textile wastewater secondary effluent on the characteristics of ultrafiltration membranes was investigated, showing changes in membrane properties and the formation of fouling layers, with larger pore size membranes exhibiting a greater decrease in permeate flux during treatment.
Article
Engineering, Chemical
Yian Chen, Jie Zhang, Yoram Cohen
Summary: Surface modification of polysulfone membranes via acrylic acid grafting and air plasma treatment enhances fouling resistance and allows for performance tuning. Air plasma treatment increases surface hydrophilicity, while tethered acrylic acid chains decrease fouling resistance and enable adjustment of molecular weight cutoff and hydraulic permeability. The approach proves to be effective in reducing fouling and adjusting performance of ultrafiltration membranes.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Polymer Science
Alexandra S. M. Wittmar, Marcus Ropertz, Michael Braun, Ulrich Hagemann, Corina Andronescu, Mathias Ulbricht
Summary: Carbon-based electrocatalysts for oxygen reduction reaction (ORR) are prepared using a two-step thermal treatment process. The nitrogen content in the catalyst can be increased by blending cellulose with chitosan. The optimized thermal treatment and pyrolysis conditions result in a catalyst with high ORR activity.
Article
Chemistry, Multidisciplinary
Md. Akhtarul Islam, Mathias Ulbricht
Summary: This study applies the Hagen-Poiseuille equation to experimental flow data of various gases through capillaries and porous media. By treating gas viscosity as an adjustable parameter, the study finds an unambiguous relationship between gas viscosity, average pressure, and capillary diameter at a constant temperature. Additionally, a universal linear relation exists for different gases between the parameter Pav*D and μ/M-0.5 (where M is molecular mass) when Pav*D < 0.01. This new interpretation of gas viscosity avoids the differentiation of flow regimes and has potential applications in fields such as microfluidic systems and pore size analysis of filters and membranes.
Article
Engineering, Environmental
Rawan Abu Alwan, Botagoz Zhuman, Mahendra Kumar, Hassan A. Arafat, Inas AlNashef
Summary: This study synthesized novel mussel-inspired polydopamine nanoparticles functionalized with ionic liquid (PDA-IL) and used them as an efficient adsorbent for the removal of anionic dyes from aqueous solutions. The PDA-IL showed a high adsorption capacity, fast kinetics, excellent selectivity, and high regeneration efficiency. Characterization results confirmed the formation of nano-sized PDA-IL particles with a polycrystalline structure.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Baiwen Ma, Mathias Ulbricht, Chengzhi Hu, Hongwei Fan, Xu Wang, Yi-Rong Pan, Seyed Saeid Hosseini, Stefan Panglisch, Bart Van der Bruggen, Zhiwei Wang
Summary: Membrane science and technology is rapidly growing worldwide, offering high separation efficiency with low energy consumption. While most research focuses on membrane fabrication and modification to enhance properties and performance, less attention has been given to membrane life cycle management, particularly at the end of service. This study highlights the importance of life cycle assessment (LCA) and specifically discusses membrane recycling to achieve green development and sustainability goals.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Review
Polymer Science
Amir Hossein Mostafavi, Ajay Kumar Mishra, Fausto Gallucci, Jong Hak Kim, Mathias Ulbricht, Anna Maria Coclite, Seyed Saeid Hosseini
Summary: This review introduces various promising chemical and physical surface modification techniques for tailoring the characteristics of thin films and membranes. It focuses on the application of chemical vapor deposition (CVD) techniques and discusses the impact of process parameters on the quality and properties of deposition. The review highlights the significance of CVD-based membranes and thin films for industrial applications.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Engineering, Chemical
Lukas Fischer, Sven Soren Hartmann, Artjom Maljusch, Christian Daeschlein, Oleg Prymak, Mathias Ulbricht
Summary: We fabricated dense anion-exchange membranes and rationally controlled the nanostructure by designing fabrication conditions and adding ionic liquid. We optimized the macroscopic properties and ion transport rates by tailoring the solidified membranes through heat or solvent annealing.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Engineering, Chemical
Duc Hoa Tran, Mathias Ulbricht
Summary: Research and development towards sustainable chemistry involves the development of new materials and exploration of new fabrication methods. In this study, composite membranes made from biodegradable cellulose were fabricated using a simple and scalable process. The use of dimethylsulfoxide as impregnation liquid improved the membrane separation performance and lamination strength. The thickness of the barrier layer could be reduced to a few micrometers, and the membrane performance could be adjusted by varying the cellulose concentration and co-solvent fraction. The cellulose-cellulose composite membranes showed potential as a sustainable alternative material for various separations.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Engineering, Chemical
Zhijun Ren, Siyang Wang, Qiuwen Wang, Longyi Lv, Dongyu Xu, Yilin Dong, Jinlong Han, Mathias Ulbricht, Li Sun, Xiaoyang Liu
Summary: Moderate KMnO4/Fe(II) pre-oxidation is a promising technique to alleviate membrane fouling and minimize environmental risks caused by the breakage of algae cells. This study investigates the performances of various components and their influences on fouling characteristics.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Engineering, Environmental
Siqi Wu, Baiwen Ma, Chengzhi Hu, Xin Hua, Hongwei Fan, Mathias Ulbricht, Jiuhui Qu
Summary: Coagulation pretreatment can improve the efficiency of membrane filtration. By regulating the 3D structure of the cake layer and the water channel characteristics, the optimization of membrane filtration can be achieved.
Editorial Material
Engineering, Environmental
Carolin Seller, Laura Varga, Elizabeth Borgardts, Bernadette Vogler, Elisabeth Janssen, Heinz Singer, Kathrin Fenner, Mark Honti
Summary: Identifying the biotransformation potential of chemicals in the aquatic environment is crucial for predicting their fate and managing their hazards. This study compared laboratory simulation studies with field measurements of compound loads in the Rhine river basin and found some differences in absolute values, but reasonable agreement in relative rankings and persistence categories between the two approaches.
Article
Marine & Freshwater Biology
Mariana de Almeida Torres, Martin R. Jones, Colette vom Berg, Ernani Pinto, Elisabeth M. -L. Janssen
Summary: Cyanobacterial blooms have a global impact on aquatic ecosystems, and their toxins, such as microcystins (MC), are a major concern. However, the ecotoxicological risks, especially non-lethal effects, associated with other co-produced secondary metabolites, remain largely unknown. In this study, we assessed the effects of cyanobacterial extracts from two Brazilian Microcystis strains on the survival, morphological alterations, swimming behavior, and cardiovascular functions of zebrafish. We found that only one strain produced MCs, and we identified other co-produced cyanopeptides using LC-HRMS/MS analysis even in the non-producer strain. Both cyanobacterial extracts caused acute toxicity in zebrafish, with varying severity. Additional decreased locomotor activity and specific adverse effects in zebrafish were observed in response to cyanobacterial metabolites other than MCs. These results highlight the need to further investigate the lethal and sublethal effects of cyanobacterial metabolites, other than MCs, and understand their underlying mechanisms of toxicity. Considering the mixture toxicity of co-produced metabolites is crucial for the ecotoxicological risk assessment of cyanobacterial bloom events, as it allows better prediction of adverse outcomes in fish and other organisms.
AQUATIC TOXICOLOGY
(2023)
Article
Engineering, Environmental
Fatema Khamis, Hanaa M. Hegab, Fawzi Banat, Hassan A. Arafat, Shadi W. Hasan
Summary: A novel pH-responsive adsorptive membrane was developed by incorporating modified mangrove particles into polylactic acid membranes. The addition of these particles significantly improved the membrane's water permeability and rejection efficiency, making it a promising candidate for wastewater treatment applications.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Nanoscience & Nanotechnology
Lukas Fischer, S. Amir H. Hesaraki, Anna Volz, Mathias Ulbricht
Summary: Porous nanocomposite membranes decorated with high loadings of nickel nanoparticles were successfully fabricated using chelating additives. These additives reduced nickel agglomeration and promoted particle presentation on the membrane surface, resulting in increased water permeance and porosity compared to membranes without additives. Incorporating the hydrophobic additive Fumion allowed for tuning of membrane hydrophobicity. The same nickel nanoparticles showed improved H-2 generation rate and higher p-NP turnover frequencies when presented in membranes with higher water contact angles and additive-directed particle presentation.
ACS APPLIED NANO MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Alexandra S. M. Wittmar, Thaarmikaa Vigneswaran, Nikola Rankovic, Ulrich Hagemann, Nils Hartmann, Ricardo Martinez-Hincapie, Viktor Colic, Mathias Ulbricht
Summary: Nitrogen-containing porous carbons with suitable structures and nitrogen content were prepared by pyrolysis of chitosan-coffee blends under nitrogen atmosphere and using KOH for surface activation. The fraction of chitosan in the precursor influenced the porous structure and electrochemical activity of the carbon materials. Nitrogen species derived from chitosan play an important role, with catalysts having higher pyridinic nitrogen content showing the highest faradaic efficiency. The synthesized materials showed comparable performance to commercially available carbons obtained from less renewable precursors.
Review
Materials Science, Multidisciplinary
Seunghyun Hong, Faisal Al Marzooqi, Jehad K. El-Demellawi, Noora Al Marzooqi, Hassan A. Arafat, Husam N. Alshareef
Summary: Due to the global lack of clean water, it is important to develop new technologies for separating pollutants from raw water. Synthetic polymer membranes have been widely used in liquid separation processes due to their selectivity and conductivity. However, the trade-off between selectivity and permeability remains a challenge. Recently, MXene-based membranes have gained attention for their ion-selective separation properties and applications in water purification. This article reviews recent progress, challenges, and future directions in MXene-based membranes.
ACS MATERIALS LETTERS
(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)