Article
Engineering, Chemical
Mehdi Sedighi, Mohammad Mahdi Behvand Usefi, Ahmad Fauzi Ismail, Mostafa Ghasemi
Summary: Electrodialysis is a membrane separation method that utilizes an electrical potential difference to separate ions in aqueous solutions. It is used in various industries for water desalination, regeneration, and other applications. The process involves ion exchange membranes, electrodes, and spacers to achieve selective mass transport and create a potential difference. This study discusses different aspects of electrodialysis, including its application, structure, membrane types, electrode materials, spacers, and application in wastewater treatment.
Article
Engineering, Chemical
Francesco Deboli, Bart Van der Bruggen, Mateusz L. Donten
Summary: This work presents a versatile chemistry platform for the fabrication of hierarchical cation and anion exchange membranes (hCEMs and hAEMs) with tuneable transport properties. The hierarchical ion exchange membranes were made by coating and UV crosslinking an acrylic ionomer on top of a PVC-SiO2 porous substrate. The properties and performance of the membranes were found to be dependent on the coating crosslinking density, with higher crosslinking density resulting in better selectivity and performance.
Article
Engineering, Chemical
Feng-rui Li, Yu-xiang Jia, Rui-qing Guo, Meng Wang
Summary: By preparing the composite AEM, the trade-off between the acid-blocking performance and membrane conductivity of traditional AEM has been successfully resolved, with the composite AEM showing excellent acid-blocking performance and acceptable membrane resistance.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Engineering, Chemical
Yakubu A. Jarma, Ezgi Cermikli, Deniz Ipekci, Esra Altiok, Nalan Kabay
Summary: Two electrodialysis (ED) stacks with different membranes were compared for simultaneous separation and recovery of boron and lithium. The results indicated that under certain operational parameters, the best separation efficiency was achieved at 20 V electrical potential.
Article
Engineering, Chemical
Joonhyeon Kim, Sangha Kim, Rhokyun Kwak
Summary: This study investigates the effects of non-conductive pattern structures on ion transport through ion exchange membranes in electrodialysis (ED). The study identifies two factors, electric view factor and vortex intensity, that control conductive/convective ion transports. Experimental results on a two-dimensional ED platform show that these factors play a significant role in determining current, ion conduction, and salt removal performance.
Article
Nanoscience & Nanotechnology
Devon Powers, Abhishek N. Mondal, Zezhou Yang, Ryszard Wycisk, Eric Kreidler, Peter N. Pintauro
Summary: Freestanding bipolar membranes with an extended-area water splitting junction were fabricated using electrospinning. The best membranes utilized a graphene oxide catalyst and exhibited a low trans-membrane voltage drop, as well as stable water splitting operation for a long period of time.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Engineering, Environmental
Amit K. Thakur, Mahdi Malmali
Summary: Polymeric cation exchange membranes have attracted attention for their selective ion transport properties. Key factors for developing these membranes include permselectivity, ionic conductivity, stability, and mechanical strength. Recent research has focused on designing membranes with various chemical structures and functionalities.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Engineering, Chemical
Yue Mao, Xu Zhang, Wending Zhu, Zhiqi Bao, Xianglu Zhang, Guanping Jin, Yang Zhang, Yahua Liu, Xiaozhao Han
Summary: In this study, an electrodialysis (ED)-based integrated process was proposed to separate Li+ from a mixed solution of LiCl and NH4Cl and simultaneously generate a concentrated LiOH solution. The process involves bipolar membrane electrodialysis (BMED) to convert the mixed solution into an alkali solution, ammonia removal with direct air stripping (AR-DAS) to remove ammonia, and conventional electrodialysis (CED) to concentrate the LiOH solution. The experimental results confirmed the effectiveness of the ED-based integrated process in separating Li+ and NH4+ mixed salt solutions.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Engineering, Chemical
Guochi Liu, Dushuai Wu, George Chen, Ronald Halim, Jie Liu, Huining Deng
Summary: In this study, an environmentally friendly electro-electrodialysis process was used to convert potassium tartrate to tartaric acid without additional waste salt generation. Two-chamber and three-chamber configurations were compared in terms of conversion ratio and energy consumption. The key factor affecting acidification in the two-chamber process was the competitive migration of ions, while the selective transport of ions influenced the three-chamber process significantly, producing higher concentration of pure tartaric acid solution.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Engineering, Chemical
Arturo Ortega, Luis F. Arenas, Joep J. H. Pijpers, Diana L. Vicencio, Juan C. Martinez, Francisca A. Rodriguez, Eligio P. Rivero
Summary: Research on flow batteries based on water dissociation and acid-base neutralization reactions at bipolar membranes aims for low-cost and environmentally friendly technology, but high round-trip efficiency remains a challenge. This study investigates critical factors using fundamental models in a laboratory scale acid-base flow battery, incorporating transport mechanisms and modeling charging and discharging processes. Model parameters are well-established, predicting current-potential behavior closely matching experimental data and providing insights for future full-scale modeling of acid-base flow batteries.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Engineering, Chemical
T. Leon, J. Lopez, R. Torres, J. Grau, L. Jofre, J. -L. Cortina
Summary: Electrodialysis is a separation process using an electric field for selective ion transport. Modeling and research on transport phenomena are critical for advancing the technology. This work aims to provide a better understanding of species transport in ED through computational modeling and analysis of concentration profiles and fluxes.
Article
Nanoscience & Nanotechnology
Ryan Kingsbury, Maruti Hegde, Jingbo Wang, Ahmet Kusoglu, Wei You, Orlando Coronell
Summary: In this study, we successfully synthesized a series of anion exchange membranes containing non-covalent cross-links formed by a hydrogen bond donor and acceptor. These monomers act synergistically to improve both membrane permselectivity and conductivity, and can be used to tune these properties relatively independently of each other, escaping the tradeoff observed in conventional membranes.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Analytical
Junsu Jang, Minsung Kim, Joonghan Shin, Daejong Yang, Minseok Kim, Bumjoo Kim
Summary: This study experimentally demonstrates the mass transport effects of partially masked ion-exchange membranes in microfluidic electrodialysis systems. Different masking membranes were prepared by depositing non-conductive films on parts of the membranes. The results show that overlapped masking membranes exhibit better electrical conductance and current/energy efficiency, while a reduction in the unit length of unmasked ion-exchange membranes enhances overall mass transport.
Article
Engineering, Chemical
Francesco Deboli, Bart Van der Bruggen, Mateusz L. Donten
Summary: The study fabricated hierarchical cation exchange membranes using blade coating and UV crosslinking techniques, demonstrating their potential for desalination. The simple and cost-effective manufacturing process resulted in membranes with performance comparable to state-of-the-art materials, indicating promising industrial applications.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Engineering, Environmental
Xi Wang, Xiaoyu Zhou, Shuang Ma, Zhe Wang, Erqiang Wang, Zengxi Li
Summary: White carbon black (WCB) is an important silica product widely used in industries. However, the production of WCB using the precipitation method generates a large amount of wastewater containing sodium sulfate and silica. This study explores the use of electrodialysis (ED) as a treatment method for WCB wastewater. The results demonstrate that ED is an effective, low energy-cost, and reliable process for treating WCB wastewater.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Biotechnology & Applied Microbiology
Kibaek Lee, Kwang-Ho Choo, How Yong Ng, Chung-Hak Lee
Article
Engineering, Environmental
Sang Hyun Lee, Hosung Lee, Chang Hyun Nahm, Joowan Lim, Sojin Min, Dowon Chae, Kibaek Lee, Kwang-Ho Choo, Chung-Hak Lee, Pyung-Kyu Park
JOURNAL OF ENVIRONMENTAL ENGINEERING
(2020)
Article
Environmental Sciences
Hyeona Park, Naresh Mameda, Chi-Wang Li, Hye Won Jeong, Hyunwoong Park, Kwang-Ho Choo
Summary: Metal oxide anode electrocatalysts are crucial for effective removal of contaminants and enhancing electrode durability. RuOx-TiO2 composite electrodes showed improved lifetime with higher Ru mole fractions. The 0.8RuO(x)-0.2TiO(2) electrode demonstrated the longest lifespan after 7 hours of calcination, indicating stable Ru oxide structure and lower charge transfer resistance.
Review
Chemistry, Applied
Jessa Marie J. Millanar-Marfa, Laura Borea, Fabiano Castrogiovanni, Shadi Wajih Hasan, Kwang-Ho Choo, Gregory V. Korshin, Mark Daniel G. de Luna, Florencio C. Ballesteros, Vincenzo Belgiorno, Vincenzo Naddeo
Summary: The paper aims to provide a comprehensive review on SFDM applications to both aerobic and anaerobic bioreactors, bridging the gap between previous reviews and current studies. It presents the historical development of DMs since the 1960s, with specific attention given to DM formation mechanisms, impacts of design, and operational factors on DM formation and performances.
SEPARATION AND PURIFICATION REVIEWS
(2022)
Article
Engineering, Chemical
Syed Salman Ali Shah, Luigi De Simone, Giuseppe Bruno, Hyeona Park, Kibaek Lee, Massimiliano Fabbricino, Irini Angelidaki, Kwang-Ho Choo
Summary: Membrane fouling is a major challenge in MBRs for wastewater treatment, and this study found that disturbance and solid retention time (SRT) significantly affect the antifouling efficacy of quorum-quenching (QQ) MBRs. The study demonstrates that a long SRT with QQ can effectively reduce membrane fouling, emphasizing the importance of microbial community diversity in MBR behavior.
Article
Environmental Sciences
Hye J. Kang, Jeongeem Ahn, Hyeona Park, Kwang-Ho Choo
Summary: UV irradiation and BAC were found to be effective in removing nitrosamines from water intended for consumption, with UV photolysis requiring high doses and potential desorption issues with BAC. Combined treatments using UV and BAC processes offer promising alternative strategies for eliminating nitrosamines when treating water for human consumption.
Review
Environmental Sciences
Andreas N. Angelakis, Mohammad Valipour, Kwang-Ho Choo, Abdelkader T. Ahmed, Alper Baba, Rohitashw Kumar, Gurpal S. Toor, Zhiwei Wang
Summary: Water is a vital resource for civilization, with freshwater being scarce and in need of conservation. The development and application of desalination technology are crucial for addressing global water scarcity issues.
Article
Engineering, Chemical
Syed Salman Ali Shah, Kibeak Lee, Hyeona Park, Kwang-Ho Choo
Summary: The study introduces anti-biofouling membranes fabricated through the immobilization of quorum quenching bacterial strains, which can inhibit biofilm growth and delay membrane fouling while reducing water permeability.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Environmental Sciences
Natacha Martin, Vinh Ya, Vincenzo Naddeo, Kwang-Ho Choo, Chi-Wang Li
Summary: Alkaline chlorination is an efficient method for cyanide (CN-) removal from wastewater, using iron salts to precipitate Prussian Blue (PB) or Turnbull's Blue (TB) for cost-effective recovery. pH and dissolved oxygen levels significantly impact the precipitation of PB and TB, with CN- removal efficiency increasing linearly with increasing Fe:CN- molar ratios. A polishing treatment with H2O2 oxidation can lower residual CN- concentrations to meet discharge limits.
Article
Chemistry, Multidisciplinary
Kibaek Lee, Chung-Hak Lee, Kwang-Ho Choo
Summary: Autoinducer-2 (AI-2) is a common quorum sensing signal used by bacteria to coordinate group behaviors when cell density is high. Existing methods for AI-2 determination are complex and costly. A new, easily applicable method using primary derivatization with DAN and HPLC with a UV detector showed effective detection of AI-2 levels in various environmental samples.
APPLIED SCIENCES-BASEL
(2021)
Article
Engineering, Environmental
Neh Nyong Shu, Hyeona Park, Syed Salman Ali Shah, Naresh Mameda, Hyun Jin Yoo, Junhong Min, Irini Angelidaki, Kwang-Ho Choo
Summary: In membrane bioreactors (MBRs), N-acyl homoserine lactones (AHLs)-related quorum sensing (QS) is identified as a major cause of biofouling during wastewater treatment. This study investigates the direct injection of unentrapped Rhodococcus sp. BH4 strains into a probiotic QQ MBR, and finds that it effectively mitigates biofouling but leads to increased fouling rates when injection is halted. The QQ bacteria degrade AHLs, inhibit soluble carbohydrates and protein generation, and increase cell-bound extracellular polymeric substance concentrations. They also impact the bacterial abundance and microbial composition.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Environmental Sciences
Supaporn Phanwilai, Pongsak (Lek) Noophan, Chi-Wang Li, Kwang-Ho Choo
Summary: A longer HRT and SRT are suggested for higher N removal efficiency at low COD:TN ratio and low DO level. However, short HRT and typical SRT can achieve nitrogen removal at high DO level. Microbial analysis shows higher abundance of AOA under low DO conditions.
Article
Biochemistry & Molecular Biology
Kibaek Lee, Syed Salman Ali Shah, Hyeona Park, Chung-Hak Lee, Kwang-Ho Choo
Summary: A double-layered membrane containing a QQ bacterium (BH4 strain) has been developed, which effectively inhibits biofilm formation, biopolymer accumulation, and signal molecule concentration on the membrane surface.
Article
Engineering, Chemical
Hyeona Park, Syed Salman Ali Shah, Gregory Korshin, Irini Angelidaki, Kwang-Ho Choo
Summary: This study investigates the impact of sunlight irradiation on membrane fouling, biopolymers, signal molecules, and microbial communities in MBRs. The results show that sunlight can degrade signal molecules that induce membrane biofouling. Sunlight exposure also leads to changes in microbial behavior and community composition in MBRs.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Engineering, Environmental
Kibaek Lee, Yeong-Jun Park, Tahir Iqbal, Hyeona Park, Yeongyun Jung, Jae-Ho Shin, Kwang-Ho Choo
Summary: Quorum quenching (QQ) has been successful in preventing biofouling in membrane bioreactors (MBRs) using isolated QQ bacterial strains. However, the effect of QQ on the microbial population is still not fully understood. This study analyzed the microbial population in MBRs over an extended period under different conditions and found that QQ treatment did not significantly affect the structure and diversity of the microbial community. The research also provided insights into the role of bacterial QQ in reducing MBR biofouling and its underlying mechanisms.
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.
