Article
Engineering, Chemical
Bin Lin, Luuk C. Rietveld, Lu Yao, Sebastiaan G. J. Heijman
Summary: This study demonstrates that Fenton cleaning in ceramic nanofiltration can effectively remove cake layer fouling on the membrane, but has limited efficacy in removing adsorptive fouling. The findings provide new insights into the evaluation and optimization of oxidative cleaning in ceramic NF for water treatment.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Engineering, Environmental
Liuqing Yang, Ximeng Zhang, Jalal Rahmatinejad, Bahareh Raisi, Zhibin Ye
Summary: Zwitterionic loose nanofiltration (Z-NF) membranes with enhanced hydrophilicity and fouling-resistant ability were successfully fabricated by rapid co-deposition of dopamine and diamine-zwitterion (Z-DNMA) via covalent bonds. The identified optimum membrane (Z-NF3) exhibited high pure water permeability and high rejections to organic dyes, as well as superior fouling-resistant performance.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Article
Environmental Sciences
Mengjiao Yan, Xue Shen, Baoyu Gao, Kangying Guo, Qinyan Yue
Summary: The study investigated the impact of three Al species coagulants and their composites on the UF process for NOM pollution. Al-a was found to be effective in mitigating membrane fouling, while waters with higher SUVA values resulted in more severe fouling, which could be alleviated through pretreatment.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Engineering, Environmental
Jiayu Chen, Juxian Chen, Xi Yue, Haixiang Li, Marc Russenberger, Lijie Zhou, Wei-Qin Zhuang
Summary: Cake layer formation is a crucial factor in fouling of anaerobic membrane bioreactors (AnMBRs). This study found that there is a discrepancy in cake layer formation triggered by different pore sizes of the AnMBR. Membranes with larger pore sizes had a longer weak rise in transmembrane pressure during cake layer formation.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Article
Engineering, Environmental
S. B. Mahat, R. Omar, H. Che Man, A. I. Md Idris, S. M. Mustapa Kamal, L. C. Abdullah, C. Shreeshivadasan
Summary: The study investigated the treatment of high-strength wastewater using a dynamic membrane in an anaerobic digester. By analyzing the protein to polysaccharide ratio and cake layer thickness, it was found that the development of the cake layer strongly influenced the treatment performance of the system, with the protein content being a main contributor to membrane fouling.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Engineering, Chemical
Hyunsu Lee, Sung-Ju Im, Hyeonho Lee, Chang-Min Kim, Am Jang
Summary: The study found that calcium ions aggravate organic fouling and ion exchange plays a crucial role in the cleaning mechanism of salt cleaning and osmotic backwash. Osmotic backwash demonstrates higher cleaning efficiency compared to salt cleaning, mainly due to the synergistic effect of backwash flux and ion exchange in removing fouling structure on the membrane surface.
Article
Environmental Sciences
Asif Matin, Shehzada Muhammad Sajid Jillani, Umair Baig, I. Ihsanullah, Khalid Alhooshani
Summary: Trace organic compounds from effluent streams can contaminate groundwater sources as they are not completely removed by conventional purification techniques. In this study, we investigated the removal efficiency and rejection mechanisms of three common pharmaceutically active compounds using different surface characteristics of commercial nanofiltration and reverse osmosis membranes. The results showed that RO membranes exhibited near-complete removal of all compounds, while the retention capabilities of NF membranes varied depending on the characteristics of the compounds, membranes, and feed solution.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Environmental Sciences
Chongbin Wang, Hongchao Wang, Yongsheng Li, Yuanyuan Feng, Kun Zhang, Sijie Fan, Li Cao
Summary: Constructing a composite nanofiltration membrane with good chlorine resistance and antifouling properties was achieved using interfacial polymerization and host-guest interaction. The optimized membrane showed minimal changes in water flux and rejection under chlorine environment, and displayed lower water flux loss in antifouling test compared to the original membrane. The contaminants on the membrane surface could be easily removed by water washing under UV light irradiation, and the antifouling membrane could be regenerated by immersing it in fresh azobenzene labeled zwitterions solution.
Review
Environmental Sciences
Ziyan Zhang, Kaiming Fan, Yanling Liu, Shengji Xia
Summary: This review systematically summarizes the research progress of polyester and polyester-amide nanofiltration membranes, including the synthesis strategies, property tuning mechanisms, and application advantages. Current challenges and future development directions are also proposed. This review provides guidance for designing high-performance polyester and polyester-amide membranes, thereby further enhancing the efficacy of nanofiltration.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Engineering, Environmental
Jinlong Wang, Heng Liang, Xiaobin Tang, Zhendong Gan, Guibai Li
Summary: The use of cation exchange membrane (CEM) electrolysis can alleviate fouling effects in nanofiltration (NF) processes, improving membrane permeability and stability. It effectively removes divalent cations, reducing scaling potential and enhancing the quality of organic indicators in NF membrane permeate. This chemical-free approach shows promise for urban water treatment and water reclamation by providing guidance on NF membrane fouling.
Article
Environmental Sciences
Rajneesh Kumar Gautam, Tuhin Kamilya, Saumya Verma, Shobha Muthukumaran, Veeriah Jegatheesan, Dimuth Navaratna
Summary: The mathematical model developed for submerged aerobic membrane bioreactors was successfully applied to elucidate the membrane cake-layer fouling mechanisms in a submerged anaerobic membrane bioreactor due to bound extracellular polymeric substances (eEPS). The study systematically investigated key design parameters and the impact of organic loading rate (OLR) on SAnMBR operation.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Biochemistry & Molecular Biology
Zoulkifli Amadou-Yacouba, Julie Mendret, Geoffroy Lesage, Francois Zaviska, Stephan Brosillon
Summary: This study investigates the impact of pre-ozonation of real MBR effluent on nanofiltration performances. The results show that ozonation has a low effect on organic carbon mineralization, but it effectively degrades specific organic matter fractions. Pre-ozonation has a beneficial effect in reducing membrane fouling and flux decrease. This study suggests that partial mineralization of organic matter through ozonation can be beneficial in reducing inorganic scaling and severe NF membrane fouling.
Article
Environmental Sciences
Abdullah Kizilet, Adem Yurtsever, Kevser Cirik, Ozer Cinar
Summary: Dynamic membranes are gaining attention as an alternative to conventional membranes due to their higher fluxes and lower fouling rates. Factors such as pore size, structure, and operating conditions affect the performance of dynamic membranes. This study focused on cake formation rates under different conditions and found that increasing fouling rates were related to decreased air sparging rates and higher food to microorganism ratios. The study also showed that the most stable operation was achieved with the 30 μm dynamic membrane, demonstrating its potential as an alternative to membrane bioreactors.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Engineering, Chemical
Bin Lin, Sebastiaan G. J. Heijman, Ran Shang, Luuk C. Rietveld
Summary: This study proposed a novel method for cleaning ceramic nanofiltration membranes, achieving high flux recovery through oxalic acid-aided Fenton process.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Engineering, Chemical
Zhewei Zhang, S. Shardul Wadekar, R. Omkar Lokare, D. Radisav Vidic
Summary: The impact of calcium scaling is affected by both feed salinity and separation driving force, and is much less severe in thermal than pressure driven membrane processes.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Engineering, Environmental
K. V. Plakas, A. A. Georgiadis, A. J. Karabelas
WATER SCIENCE AND TECHNOLOGY
(2016)
Article
Engineering, Environmental
Konstantinos V. Plakas, Vasilis C. Sarasidis, Sotiris I. Patsios, Dimitra A. Lambropoulou, Anastasios J. Karabelas
CHEMICAL ENGINEERING JOURNAL
(2016)
Article
Engineering, Environmental
Konstantinos V. Plakas, Stella D. Sklari, Dimitrios A. Yiankakis, Georgios Th Sideropoulos, Vassilis T. Zaspalis, Anastasios J. Karabelas
Article
Chemistry, Physical
Irene Salmeron, Konstantinos V. Plakas, Ignasi Sires, Isabel Oller, Manuel I. Maldonado, Anastasios J. Karabelas, Sixto Malato
APPLIED CATALYSIS B-ENVIRONMENTAL
(2019)
Article
Environmental Sciences
Konstantinos V. Plakas, Athina Taxintari, Anastasios J. Karabelas
Article
Engineering, Environmental
K. Plakas, A. Mantza, S. D. Sklari, V. T. Zaspalis, A. J. Karabelas
CHEMICAL ENGINEERING JOURNAL
(2019)
Article
Environmental Sciences
B. S. Tawabini, K. V. Plakas, M. Fraim, E. Safi, T. Oyehan, A. J. Karabelas
Article
Engineering, Environmental
Bassam S. Tawabini, Konstantinos Plakas, Anastasios J. Karabelas
JOURNAL OF WATER PROCESS ENGINEERING
(2020)
Article
Environmental Sciences
I Salmeron, I Oller, K. Plakas, S. Malato
Summary: The autopsy of carbon-PTFE cathodes in a plate-and-frame cell with a Nb-BDD anode revealed a significant decrease in H2O2 electrogeneration, hindering the efficient performance of Fenton-like processes. The study found that the first cathode suffered surface degradation, while the second cathode had iron oxide inlays due to the decomposition of Fe3+:EDDS and iron precipitation at neutral pH.
Article
Environmental Sciences
P. N. Petsi, V. C. Sarasidis, K. V. Plakas, A. J. Karabelas
Summary: The study examined the potential of Photocatalytic Membrane Reactor (PMR) technology for nitrate removal from drinking water with organic electron donors. Formic acid was found to be the most effective hole scavenger, followed by acetic acid and humic acid. The PMR system showed superior performance in nitrate reduction and total organic carbon percentage removal. Further research is needed to optimize the process for improved efficiency.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2021)
Article
Engineering, Marine
Vasileios Takavakoglou, Apostolos Georgiadis, Eleanna Pana, Pantazis E. Georgiou, Dimitrios K. Karpouzos, Konstantinos V. Plakas
Summary: The study found that the environmental impacts of floating wetlands in marine water pollution control mainly come from the stage of raw materials production and acquisition, while economic performance indicators suggest that floating wetlands may be a viable investment with potential positive socioeconomic impacts. However, there are still challenges to consider for the operational application of such systems at full-scale in marine environments.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2021)
Review
Energy & Fuels
Dimitrios Koutsonikolas, George Karagiannakis, Konstantinos Plakas, Vasileios Chatzis, George Skevis, Paola Giudicianni, Davide Amato, Pino Sabia, Nikolaos Boukis, Katharina Stoll
Summary: Phytoremediation is an emerging concept for restoring contaminated soil using resilient plants. The contaminated biomass can be converted to energy carriers/chemicals through thermochemical processes such as Supercritical Water Gasification and Fast Pyrolysis. Purification technologies, including membrane gas absorption, electrooxidation/electrocoagulation, and microfiltration, are crucial for the successful integration of these conversion processes. Challenges, risks, and suitable strategies for implementing these purification technologies in the context of biomass-to-energy conversion are discussed.
Article
Green & Sustainable Science & Technology
Alexia Voutetaki, Konstantinos V. Plakas, Athanasios I. Papadopoulos, Dimitrios Bollas, Symeon Parcharidis, Panos Seferlis
Summary: Electrodialysis is a promising technique for the separation of important ions in industrial effluents. However, there is limited research on the simultaneous removal of lead and sulfate ions. This study investigates the removal of lead and sulfate ions at industrially relevant concentrations using a pilot-scale electrodialysis setup. The optimized conditions for sulfate ion removal were applied for simultaneous removal of lead and sulfate ions, achieving high removal rates with an energy consumption of 7 kWh/m3.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Engineering, Environmental
V. C. Sarasidis, K. V. Plakas, A. J. Karabelas
CHEMICAL ENGINEERING JOURNAL
(2017)
Article
Environmental Sciences
K. Plakas, A. J. Karabelas
GLOBAL NEST JOURNAL
(2016)
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)