Article
Engineering, Chemical
Pradeep K. Prajapati, Rajaram K. Nagarale, Puyam S. Singh
Summary: This study demonstrates the effective oxygen transport by covalently bonded Cobalt Phthalocyanine complex anchored on multi walled carbon nanotube, leading to high oxygen permeance and selectivity in the PDMS hollow fiber membranes. The functionalized MWCNT was thoroughly characterized, confirming successful immobilization of the complex. The membranes showed exceptional oxygen transport properties, suggesting their best utility in selective oxygen concentration for practical applications.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Engineering, Chemical
Baek-Gyu Im, Lijo Francis, Ravichandran Santosh, Woo-Seung Kim, Noreddine Ghaffour, Young-Deuk Kim
Summary: This study employed commercially available polypropylene hollow fiber membranes for air gap and water gap membrane distillation processes. The performance of the polypropylene membranes was compared with that of in-house fabricated microporous polyvinylidene fluoride membranes. The results demonstrated that the polypropylene hollow fiber membranes exhibited good performance in AGMD and WGMD processes, achieving high permeation flux under specific operating conditions.
Article
Engineering, Chemical
Xiao Wang, Khaled bin Bandar, Michael D. Wales, Palitha Jayaweera, Radwan A. Alrasheed, Saad A. Aljlil, Indira Jayaweera
Summary: In this study, PBI ultrafiltration hollow-fiber membranes with a pore size of 21-25nm were successfully fabricated, showing good anti-fouling performance in filtration tests.
DESALINATION AND WATER TREATMENT
(2021)
Article
Polymer Science
Jinhu Jiang, Caiyun Lu, Shiyu Shen, Qifan Deng, Bei Wang, Chunyin Shen, Yanli Wang, Liang Zhan, Gance Dai
Summary: Polyether sulfone hollow fiber membrane was prepared using nonsolvent-induced phase separation process. The air gap environment played a crucial role in the formation of membrane structure. The humidity of the air gap affected the surface pore formation and the overall structure of the membrane.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Engineering, Chemical
Shaozhe Zhang, Xiaolong Lu, Ziqiang Liu, Ronghua Ma, Kai Ren, Jie Gu
Summary: The feed flow state has a significant impact on temperature polarization, concentration polarization, and membrane fouling in membrane distillation. In this study, a novel braided structure for AGMD was proposed, which effectively improves the feed flow state. Comparative experiments showed that the braided module outperformed the parallel module in terms of flux, gained output ratio, concentration polarization coefficient, and membrane fouling.
Article
Engineering, Environmental
Qingwen Qin, Juan Li, Hui Jia, Jie Wang
Summary: This study investigates the adverse effects of air resistance on membrane flux in water treatment with membrane filtration process. A new in-situ monitoring method, ultrasonic phased array, is used to investigate the distribution of released air and a strategy to mitigate the air resistance is proposed. The results show that the optimal operation can reduce the air resistance in the variable membrane filtration mode in water treatment.
Article
Materials Science, Ceramics
O. A. Bragina, A. P. Nemudry
Summary: SrFe0.95Mo0.05O3-delta (SFM5) perovskite hollow fiber (HF) membranes with a finger-like structure were fabricated using a phase inversion technique. The oxygen flux through SFM5 hollow fiber membrane was evaluated and reached 0.64 mu mol/cm2 *s at T = 880 degrees C, which is 5 times higher than that of a disk SFM5 membrane (0.12 mu mol/ cm2 *s). A further increase in oxygen fluxes was attained by Ag deposition on the inner surface of SFM5 hollow fiber membrane. The oxygen flux of SFM5 HF membranes is governed by surface-exchange reactions on the permeate side. The equilibrium 3 -delta -lg pO2 -T diagrams showed that doping of SF by molybdenum leads to a broadening of the cubic perovskite phase stability region.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Chemistry, Multidisciplinary
Sie Hao Ding, Pei Ching Oh, Asif Jamil
Summary: In this study, PVDF HFMs were prepared by manipulating air gap intervals during spinning. The results showed that increasing the air gap distance can reduce inner lumen defects, improve CO2 gas permeance and CO2/CH4 ideal selectivity. Therefore, varying the air gap distance is considered a practical approach for better gas separation performance.
KOREAN JOURNAL OF CHEMICAL ENGINEERING
(2022)
Article
Engineering, Chemical
Peng Du, Jieyu Song, Xuerui Wang, Yuting Zhang, Jixian Xie, Gang Liu, Yongli Liu, Zhenwei Wang, Zhou Hong, Xuehong Gu
Summary: Efficient hydrogen separation is crucial from the cracked tail gas of ethylene plant. DD3R zeolite membranes were developed for this purpose, showing high selectivity and stability under harsh conditions. The efficient scale-up synthesis method led to the production of high-quality membranes suitable for industrial applications.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Biochemistry & Molecular Biology
Hazirah Syahirah Zakria, Mohd Hafiz Dzarfan Othman, Siti Hamimah Sheikh Abdul Kadir, Roziana Kamaludin, Asim Jilani, Muhammad Firdaus Omar, Suriani Abu Bakar, Juhana Jaafar, Mukhlis A. Rahman, Huda Abdullah, Mohd Hafiz Puteh, Oulavanh Sinsamphanh, Muhammad Ayub
Summary: The use of triethyl phosphate and polyethylene glycol in the fabrication of PVDF hollow fiber membrane can enhance mechanical properties and surface hydrophilicity, increase porosity and water flux, and create a more environmentally friendly membrane for sustainable use.
Article
Engineering, Environmental
Yue Guan, Chenchen Zhang, Zhihui Liu, Liang Zhang, Jianqiang Meng
Summary: In this work, a polybenzimidazole (PBI) hollow fiber loose nanofiltration membrane (HFLNM) was prepared and used for dye and salt separation. The membrane exhibited good heat resistance, acid resistance, and solvent resistance. By adjusting the air gap distance, the optimized membrane showed outstanding water flux, low salt rejection, and excellent dye rejection. Hence, PBI HFLNM has a good application prospect in the field of dye/salt separation in harsh environments.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Engineering, Environmental
S. A. Mousavi, Z. Arab Aboosadi, A. Mansourizadeh, B. Honarvar
Summary: The study used a dip-coating method to improve the surface hydrophobicity of polyetherimide (PEI) hollow fiber membrane, and applied an air gap membrane distillation (AGMD) process for treating methylene blue (MB) solution. The modified PEI-Zonyl membrane exhibited good membrane separation performance, making it a promising alternative for treating dyeing wastewaters.
WATER SCIENCE AND TECHNOLOGY
(2021)
Article
Energy & Fuels
Weichao Yan, Xiangzhao Meng, Xin Cui, Yilin Liu, Qian Chen, Liwen Jin
Summary: This study aims to develop accurate and rapid performance prediction models for the proposed hollow fiber membrane-based evaporative cooler (HFMEC). Five accurate and practical empirical equations were derived using experimental and simulated data. These equations can be used for parameter sensitivity analysis and multi-objective optimization. A case study demonstrated the ability of these equations to conveniently make performance predictions, aiding in optimization and design.
Article
Thermodynamics
Weichao Yan, Xin Cui, Xiangzhao Meng, Chuanjun Yang, Yilin Liu, Hui An, Liwen Jin
Summary: The hollow fiber membrane-integrated evaporative cooler (MEC) is a promising strategy for space air conditioning. This study developed a numerical model to investigate the influence of fiber specifications and flow configuration on its performance. The results showed that a reasonable fiber specification required a packing fraction of 0.1 and a slightly longer length, while the flow configuration of air via shell-side and water through tube-side was more energy efficient for the MEC.
Article
Energy & Fuels
Pavel Bulejko
Summary: This study analyzed the energy requirements for drawing air through a hollow-fiber membrane (HFM) during air filtration, comparing different parameters of HFMs in terms of air flowrate and dust loading rate. The results showed that smaller diameter HFMs had significantly higher energy consumption to operate the blower, and the energy consumption trend during dust loading depended on the inner fiber diameter.
Article
Environmental Sciences
Turker Turken, Reyhan Sengur-Tasdemir, Gulsum Melike Urper-Bayram, Oguz Gunes, Esra Ates-Genceli, Volodymyr V. Tarabara, Ismail Koyuncu
Summary: The study found that the optimum permeability and BSA rejection were achieved when the molecular weight of the PVP was 40 kDa. However, increasing the advancing speed resulted in a thinner membrane wall, which increased the likelihood of irreversible fouling.
ENVIRONMENTAL TECHNOLOGY
(2021)
Article
Chemistry, Physical
Xunhao Wang, Reyhan Sengur-Tasdemir, Ismail Koyuncu, Volodymyr V. Tarabara
Summary: The study reveals that drying of lip balms increases surface hydrophobicity, leading to enhanced virus adhesion. Through experiments and calculations, it is found that hydrophilic colloids may attach to lip balm surfaces under conditions of saliva ionic strength.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Article
Engineering, Ocean
Umit Karadogan, Sevde Korkut, Gokhan Cevikbilen, Berrak Teymur, Ismail Koyuncu
Summary: This study introduces a methodology to prevent excessive and misuse of polymers in dewatering applications by using various measurements and analyses. By selecting appropriate types and dosages of polymers, the research successfully increased the flocculation size and settlement rate, ultimately achieving water quality standards suitable for discharge into marine environments.
MARINE GEORESOURCES & GEOTECHNOLOGY
(2021)
Article
Engineering, Environmental
Basak Keskin, Turkan Ormanci-Acar, Turker Turken, Derya Y. Imer, Ismail Koyuncu
WATER SCIENCE AND TECHNOLOGY
(2020)
Review
Environmental Sciences
Mehmet Emin Pasaoglu, Ismail Koyuncu
Summary: Engineered composites commonly use fibrous reinforcing materials such as carbon fiber and glass fiber, but there is growing interest in biobased materials like plant fibers. Nanocelluloses, projected to be cheaper and potentially produce in great quantities, have garnered particular interest recently.
Article
Engineering, Environmental
Basak Keskin, Meltem Agtas, Turkan Ormanci-Acar, Turker Turken, Derya Y. Imer, Serkan Unal, Yusuf Z. Menceloglu, Tugba Ucar-Demir, Ismail Koyuncu
Summary: In this study, UF flat sheet membranes were manufactured by wet phase inversion with two different halloysite nanotubes sizes and five ratios. Various characterization methods and synthetic dye waters were used for performance tests. The results showed that UF membranes containing 1.88% w/w ratio of HNT exhibited the best water permeability and dye performance.
WATER SCIENCE AND TECHNOLOGY
(2021)
Article
Engineering, Environmental
Bahriye Eryildiz, Ayse Yuksekdag, Sevde Korkut, Bihter Zeytuncu, Mehmet Emin Pasaoglu, Ismail Koyuncu
JOURNAL OF WATER PROCESS ENGINEERING
(2020)
Article
Materials Science, Multidisciplinary
Mohammad Reza Ganjali, Alireza Badiei, Arash Mouradzadegun, Vahid Vatanpour, Seyed Soroush Mousavi Khadem, M. Tajammal Munir, Sajjad Habibzadeh, Mohammad Reza Saeb, Ismail Koyuncu
MATERIALS TODAY COMMUNICATIONS
(2020)
Article
Environmental Sciences
Meltem Agtas, Ozgun Yilmaz, Mehmet Dilaver, Kadir Alp, Ismail Koyuncu
Summary: This study focused on the treatment of caustic-containing textile wastewater and the reuse potential of obtained caustic chemicals using a pilot-scale ceramic membrane system. Results showed that the overall average removal efficiencies for ultrafiltration + nanofiltration cycles were 67% for total organic carbon, 71% for chemical oxygen demand, 42% for total hardness, and 92% for color.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Biotechnology & Applied Microbiology
Onur Isik, Merdan Batyrow, Amr Mustafa Abdelrahman, Irem Orman, Hale Ozgun, Mustafa Evren Ersahin, Mehmet Emin Pasaoglu, Ibrahim Demir, Ismail Koyuncu
Summary: The study investigated the effect of sludge concentration on the performance of an aerobic dynamic membrane bioreactor (DMBR). It was found that selecting the optimum sludge concentration is crucial for achieving a homogeneous and stable dynamic membrane (DM) layer in DMBRs. Higher sludge concentration resulted in a larger particle size distribution in the permeate, increased transmembrane pressure, and rapid clogging.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2021)
Article
Biotechnology & Applied Microbiology
Bahriye Eryildiz, Ayse Yuksekdag, Sevde Korkut, Ismail Koyuncu
Summary: This study investigated the removal performance of boron from real wastewater using an air gap membrane distillation system, considering the impact of boron concentration, membrane pore size, and membrane material. The results showed that boron removal efficiency was above 99% in all conditions, with decreased permeate water flux as boron concentration in feed wastewater increased. Increasing membrane pore size enhanced permeate flux, with polypropylene membranes exhibiting the highest flux in AGMD tests.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2021)
Article
Materials Science, Paper & Wood
Mehmet Emin Pasaoglu, Ismail Koyuncu
Summary: The study fabricated tubular nanofiber PRO membranes using electrospinning technique, where the addition of CNCs increased the mechanical strength in PAN membranes and achieved higher PRO water flux.
Article
Environmental Sciences
Ayse Yuksekdag, Borte Kose-Mutlu, Beril Tanc Kaya, Mustafa Kumral, Mark R. Wiesner, Ismail Koyuncu
Summary: This paper reviews the potential and types of rare earth elements in 32 different secondary sources in Turkey. It was found that combustion residues and e-waste contain the highest concentrations of rare earth elements among all types of waste/wastewater.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Environmental Sciences
H. Ozgun, B. Cicekalan, Y. Akdag, I Koyuncu, I Ozturk
Summary: This study analyzed the real capital and operation and maintenance expenditures of 16 full-scale WWTPs in Istanbul to calculate unit capital and operation and maintenance costs, and investigated the impacts of treatment level and capacity on costs. The results demonstrated that the level of treatment considerably affected the costs of WWTPs.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Engineering, Chemical
Arvin Sohrabi, Mousa Meratizaman, Shuli Liu
Summary: This paper simulates and discusses possible solutions to improve the economic and technical performances of a battery-less renewable energy-powered BWRO system under real climate conditions. The study finds that the photovoltaic-based system performs better in terms of specific energy consumption and unused energy ratio.
Article
Engineering, Chemical
Chunlan Pan, Xiaoyin Hu, Vishal Goyal, Theyab R. Alsenani, Salem Alkhalaf, Tamim Alkhalifah, Fahad Alturise, Hamad Almujibah, H. Elhosiny Ali
Summary: This paper introduces a novel waste heat recovery method using the hot flue gas from a ship's engine to produce liquefied hydrogen while meeting the ship's air-conditioning requirement. A comprehensive feasibility assessment is conducted and an artificial neural network with a multiobjective grey wolf optimization method is used for optimization. The findings indicate the highest mean sensitivity index of the flash temperature and the best optimization scenario for exergy efficiency, CO2 emission reduction, and liquefied hydrogen cost.
Article
Engineering, Chemical
Daniele Chinello, Jan Post, Louis C. P. M. de Smet
Summary: In this study, PVDF-based anion-exchange membranes were designed to selectively separate nitrate from chloride. Experimental data showed that increasing the concentration of PVDF enhanced nitrate transport but also increased the membrane electrical resistance. The selectivity of nitrate was found to be independent of the membrane thickness and mainly driven by the increased affinity between the anion and the membrane.
Article
Engineering, Chemical
Umar Noor, Muhammad Fayyaz Farid, Ammara Sharif, Amna Saleem, Zubair Nabi, Muhammad Furqan Mughal, Kiran Abbas, Toheed Ahmed
Summary: Global water scarcity is increasing, and water desalination is an important solution. Multifunctional advanced materials, such as membrane materials and solar-driven desalination, play a crucial role in water desalination. Additionally, these materials can be used for water purification, wastewater treatment, and pollutant elimination.
Article
Engineering, Chemical
Emrah Gumus
Summary: With growing global concerns about climate change and environmental impacts, the use of nuclear energy in naval vessels offers a cleaner and more efficient solution to reduce emissions and address water and energy supply challenges. This study explores a novel system that combines a nuclear-driven supercritical carbon dioxide power cycle with reverse osmosis cogeneration to meet the water and electricity demands in maritime operations, enhancing the sustainability, efficiency, and self-sufficiency of naval vessels. The results indicate that the system has the potential to be a viable and effective solution for naval operations.
Article
Engineering, Chemical
Dao Thi Thanh Huyen, Saikat Sinha Ray, Young -Nam Kwon
Summary: This study focuses on the modification of a commercially available polyamide thin-film composite membrane with a zwitterionic material to enhance its fouling resistance. The modified membrane shows improved salt rejection and reduced permeability compared to the pristine membrane. Fouling tests demonstrate that the modified membrane has a lower fouling ratio and higher recovery ratio. The enhanced antifouling characteristics are attributed to the improved hydrophilicity resulting from the zwitterionic brushes and the salting-in effect.
Article
Engineering, Chemical
Niklas Koeller, Lukas Mankertz, Selina Finger, Christian J. Linnartz, Matthias Wessling
Summary: This study presents a methodology to scale up Flow-electrode Capacitive Deionization (FCDI) technology from lab-scale to pilot-scale systems. By increasing membrane area and using a stacking approach, the FCDI modules were successfully scaled up and achieved a salt transfer rate comparable to lab-scale systems. This provides a foundation for future assessments of energy demand and economics.
Article
Engineering, Chemical
Mona Gulied, Sifani Zavahir, Tasneem Elmakki, Hyunwoong Park, Guillermo Hijos Gago, Ho Kyong Shon, Dong Suk Han
Summary: This study introduces a novel hybrid system that combines direct contact membrane distillation (DCMD) and electrically switched ion exchange (ESIX) to facilitate seawater reverse osmosis (SWRO) brine enrichment and selective lithium recovery.
Article
Engineering, Chemical
Zhiqiang Zhang, Ruifeng Deng, Jiao Zhang, Lu She, Guangfeng Wei, Renyong Jia, Pengyu Xiang, Siqing Xia
Summary: A transmembrane electro-chemisorption system with authigenic acid and base was developed for enhancing ammonia recovery from strong ammonia wastewater. The system efficiently transformed ammonium into free ammonia, which was then adsorbed and recovered through transmembrane chemisorption. This system yielded pure (NH4)2SO4 product and produced valuable byproducts of pure hydrogen and oxygen. Higher applied voltage resulted in better ammonia recovery.
Article
Engineering, Chemical
Alena Popova, Sandrine Boivin, Takuji Shintani, Takahiro Fujioka
Summary: This study aimed to produce a high-integrity RO membrane by forming a polyamide skin layer on a TE support layer, in order to enhance the integrity of the membrane and improve the microbiological safety of potable water reuse.
Article
Engineering, Chemical
Sanjana Yagnambhatt, Saber Khanmohammadi, Jonathan Maisonneuve
Summary: This study investigates the concept of using heat to enhance reverse osmosis (RO) desalination. The effect of temperature on water permeate flux, specific energy, permeate quality, and applied operating pressures is evaluated using an analytical model. The results suggest that under specific conditions, the tradeoff between savings in mechanical pump work and thermal energy input in thermally-enhanced RO can be favorable, leading to overall energy savings.
Article
Engineering, Chemical
Jiangju Si, Chenrui Xue, Shun Li, Linchao Yang, Weiwei Li, Jie Yang, Jihong Lan, Ningbo Sun
Summary: To meet the huge demand for lithium resources, there is an urgent need to develop a new efficient technology for lithium recovery from salt-lake brines. In this study, a selective membrane capacitive deionization system is reported, which achieves high lithium recovery capacity and rate through the use of materials with efficient intercalated pseudo-capacitance and a high specific area porous carbon. The use of a modified thin-coated membrane allows for selective Li+ recovery, and adjusting the concentrations of Li+ and Mg2+ in the feed solution enables higher Li+/Mg2+ selectivity.
Article
Engineering, Chemical
Mohamed R. Salem, R. Y. Sakr, Ghazy M. R. Assassa, Omar A. Aly
Summary: This research proposes a new method of using wasted thermal energies as an additional heating source for solar still distillation units (SSDUs) to increase productivity and reduce pollution and global warming. By testing two SSDUs, the study shows that heating airflow can raise temperatures, enhance freshwater production, and improve system thermal efficiency.
Article
Engineering, Chemical
Qimeng Sun, Miao Sun, Linyan Yang, Yuan Gao, Xinghai Zhou, Lihua Lyu, Chunyan Wei
Summary: This study presents an innovative design and fabrication of a fabric-based conical roll (FCR) evaporator, which enables low-temperature evaporation and achieves high evaporation efficiency with excellent thermal management ability. The evaporator has demonstrated advanced light-harvesting capability and can produce freshwater that meets drinking water standards, showing great potential for applications in desalination and sewage treatment.
Article
Engineering, Chemical
Yidong Zhang, Wangfang Deng, Meiyan Wu, Chao Liu, Guang Yu, Qiu Cui, Pedram Fatehi, Chunlin Xu, Bin Li
Summary: In this study, a novel polydopamine-functionalized lignin-containing pulp foam evaporator with high-efficiency desalination and multi-contaminant adsorption capabilities was designed. The foam evaporator showed excellent light absorption, water absorption, thermal conductivity, and chelation abilities, allowing for solar evaporation and contaminant adsorption synergistically. It also exhibited potential applications in metal ion concentration and contaminated seawater treatments, and demonstrated superior biodegradability compared to poly-styrene foam. This foam material holds promise for developing multifunctional photo-thermal systems for solar-driven water purification.