Article
Chemistry, Physical
Hamouda M. Mousa, Jarah Fares Alenezi, Ibrahim M. A. Mohamed, Ahmed S. Yasin, Abdel-Fatah M. Hashem, Abdalla Abdal-hay
Summary: This study successfully synthesized a semiconductor-semiconductor (S-S) heterojunction film with low bandgap energy, achieving efficient wastewater treatment through photocatalysis. The new material exhibited excellent antibacterial properties and photodegradation effects, showing great potential for application in wastewater treatment.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Environmental Sciences
Manjiri A. Mahadadalkar, NaHyun Park, Mohammad Yusuf, Saravanan Nagappan, Muthuchamy Nallal, Kang Hyun Park
Summary: Water pollution caused by industrial wastewater is a critical environmental problem. Synthetic dyes used in various industries have complex composition, high toxicity, and low biodegradability, causing negative impacts on ecosystems. To address this issue, TiO2 fibers photocatalyst doped with Fe was synthesized using sol-gel and electrospinning techniques for the degradation of dyes. The fabricated fibers showed excellent photocatalytic degradation activity, with 99% degradation of rhodamine B in 120 minutes. The fibers also demonstrated good photocatalytic activity even after 5 cycles of reuse.
Article
Biochemistry & Molecular Biology
Yaser Rasouli, Mohammad Mehdi Parivazh, Mohsen Abbasi, Mohammad Akrami
Summary: In this study, four inexpensive ceramic microfiltration membranes were synthesized and their performance in treating salt-containing wastewater was investigated. The results showed that the permeate flux of the membranes increased significantly at lower salt concentrations, but decreased at higher concentrations. Furthermore, the rejection of ions slightly increased with the increase in salt dosage, while the oil rejection remained relatively constant.
Article
Environmental Sciences
Pooja Kumari, Rajib Saha, Gaurav Saikia, Aditya Bhujel, Mahua Gupta Choudhury, Pravin Jagdale, Samrat Paul
Summary: The use of TiO2 nanoparticles for photocatalysis for the degradation of organic dyes under UV light for wastewater treatment has been widely studied. However, the photocatalytic characteristics of TiO2 nanoparticles are inadequate. In this study, three types of nanoparticles (TiO2, ZrO2, and mixed-phase TiO2-ZrO2) were synthesized and their properties were examined. The results showed that the mixed-phase TiO2-ZrO2 nanoparticles exhibited higher photocatalytic activity for the degradation of Eosin Yellow under visible light compared to TiO2 and ZrO2 nanoparticles.
Article
Engineering, Environmental
Madu Purnima, Kannan Paksirajan, G. Pugazhenthi
Summary: This study developed a tubular ceramic membrane using low-cost clays and a binder for the separation of TiO2 nanoparticles from water. The membrane showed excellent water permeability and separation efficiency, making it suitable for the removal of TiO2.
JOURNAL OF WATER PROCESS ENGINEERING
(2022)
Review
Chemistry, Multidisciplinary
Ethan Dern Huang Kong, Jenny Hui Foong Chau, Chin Wei Lai, Cheng Seong Khe, Gaurav Sharma, Amit Kumar, Suchart Siengchin, Mavinkere Rangappa Sanjay
Summary: Water pollution is a global issue that conventional methods struggle to solve, but photocatalysis, especially with GO/TiO2 composites, shows promising results in wastewater treatment.
Article
Environmental Sciences
Ranjitha K. Hariharalakshmanan, Juan Martinez, Busra Ergul-Yilmaz, Tansel Karabacak
Summary: In this study, ZnO nanostructures were synthesized using a simple and chemical additive-free hot water treatment (HWT) method for the photocatalytic degradation of MB. The effects of ZnO nanostructure load, initial concentration, and pH of MB on photocatalytic degradation were studied. The results showed that the ZnO nanostructures exhibited the best average photocatalytic degradation under UV light at a ZnO nanostructure suspension volume of 25 mL, MB concentration of 1 ppm, and pH of 11. The HWT ZnO nanostructures in both DI-water and hot tap water showed significant photocatalytic activity and have potential for scalable and cost-effective synthesis.
WATER AIR AND SOIL POLLUTION
(2023)
Article
Engineering, Environmental
Leonilde Marchao, Jose R. Fernandes, Ana Sampaio, Jose A. Peres, Pedro B. Tavares, Marco S. Lucas
Summary: The study demonstrates that cultivating microalgae in winery wastewater can effectively increase biomass growth and remove pollutants, with Chlorella vulgaris performing well under mixotrophic conditions. Photocatalytic treatment can efficiently remove COD and polyphenols from wastewater, ensuring compliance with legal standards for release into superficial water courses.
Article
Materials Science, Multidisciplinary
Devagi Kanakaraju, Feniellia Diwvya anak Kutiang, Ying Chin Lim, Pei Sean Goh
Summary: This review primarily discusses and evaluates the recent progress in the modification of Ag/TiO2, focusing on co-doping with non-metals and transition metals and the synthesis strategies for engineering the materials. The effects of doping and co-doping on the induced chemical and physical properties, photocatalytic performance, stability, and recyclability aspects are highlighted. The potential improvement of Ag/TiO2 through the addition of green materials is also examined, and recommendations for further research opportunities, limitations, and challenges are suggested.
APPLIED MATERIALS TODAY
(2022)
Article
Chemistry, Inorganic & Nuclear
Shweta Manchwari, Jaya Khatter, R. P. Chauhan
Summary: This study focuses on the synthesis of TiO2/CdS nanocomposites with different concentrations of precursors and their characterization using various techniques. The results show that TiO2/CdS nanocomposites exhibit excellent photocatalytic performance in the visible range compared to pure TiO2, and they have better degradation efficiency for methylene blue dye compared to rhodamine B dye. The optimum photocatalytic performance is achieved with a 1:1 M ratio of cadmium and sulphur precursors.
INORGANIC CHEMISTRY COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Yaoyao Wu, Xiaotao Chen, Jiachun Cao, Yuqing Zhu, Wenjing Yuan, Zhuofeng Hu, Zhimin Ao, Gary W. Brudvig, Fenghui Tian, Jimmy C. Yu, Chuanhao Li
Summary: A dual-defect heterojunction system of TiO2 hierarchical microspheres with oxygen vacancies modified with ultrathin MoS2-x nanosheets (MoS2-x @TiO2-OV) was designed for degrading pollutants and evolving hydrogen simultaneously with enhanced photocatalytic activity. The catalyst showed superior performance in treating pharmaceutical and coking wastewater, highlighting the crucial role of defect engineering in developing energy-recovering wastewater treatment approaches.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
Article
Chemistry, Physical
Mouheb Sboui, Wenke Niu, Dunzhi Li, Gui Lu, Na Zhou, Kai Zhang, Jia Hong Pan
Summary: A novel conductive membrane of TiO2/PANI/PVDF was synthesized using a phase inversion method with the presence of SDS surfactant. The resulting membrane exhibits high porosity, good mechanical stability, low resistivity, and excellent performance in dye decolorization and water flux.
APPLIED CATALYSIS A-GENERAL
(2022)
Article
Chemistry, Multidisciplinary
Omid Amiri, Haval Aziz Ahmed, Abdulla Ahmed Abdan, Peshawa H. Mahmood, Masoud Salavati-Niasari
Summary: The study demonstrated the significant effect of BaCO3 on piezocatalytic activity, showing a substantial improvement in the degradation efficiency of pollutants. By controlling ultrasonic parameters, it is possible to achieve highly efficient degradation of pollutants under mechanical energy force.
Article
Materials Science, Multidisciplinary
Ni Wang, Hao Zhang, Songyu Liu, Bo Peng, Ziwei Deng
Summary: This study developed a composite PDA-based TiO2 coated mesh with superhydrophobicity and photocatalytic activity, which can effectively separate oils and degrade organic pollutants in wastewater, providing a new approach for wastewater purification.
JOURNAL OF MATERIALS SCIENCE
(2021)
Review
Chemistry, Physical
E. Kweinor Tetteh, S. Rathilal, D. Asante-Sackey, M. Noro Chollom
Summary: Integrated photocatalytic-membrane (IPM) technologies show great potential in removing toxic pollutants from wastewater, but also face challenges;
Based on titanium dioxide, photocatalytic-based membrane technology has significant potential for wastewater reclamation and reuse;
Future focus should be on the development of magnetized TiO2-based membrane technology, as well as conducting life cycle assessment research to promote its large-scale application.
Article
Green & Sustainable Science & Technology
Saly M. Matta, Muaz A. Selam, Husnain Manzoor, Samer Adham, Ho Kyong Shon, Marcelo Castier, Ahmed Abdel-Wahab
Summary: A process simulator has been developed to model and predict the performance of spiral-wound membrane modules in pressure retarded osmosis processes. The simulator allows for the calculation of total permeation and power density by taking into account the driving force profile consistent with flow patterns specific to spiral-wound membranes.
Article
Environmental Sciences
Umakant Badeti, Jiaxi Jiang, Abdulaziz Almuntashiri, Nirenkumar Pathak, Ugyen Dorji, Federico Volpin, Stefano Freguia, Wei Lun Ang, Amit Chanan, Sanjay Kumarasingham, Ho Kyong Shon, Sherub Phuntsho
Summary: This study simulated the impact of urine diversion on a decentralised wastewater treatment plant by using BioWin. The simulation showed that urine diversion can double the treatment capacity of the plant and reduce capital costs. When urine diversion exceeds a certain ratio, the existing treatment process can be replaced by a simpler membrane bioreactor.
Article
Engineering, Chemical
Shanshan Xu, Rongrong He, Shuwei Zhao, Ho Kyong Shon, Tao He
Summary: This study proposes an accurate evaluation method for the rejection of nanofiltration (NF) membranes, which corrects the measurement errors caused by monovalent ions. It promotes fair comparison of NF membrane performance in literature, reliable analysis of separation mechanisms, and precise determination of product purity.
Article
Engineering, Chemical
Sayed Mukit Hossain, Hanwei Yu, Youngwoo Choo, Gayathri Naidu, Dong Suk Han, Ho Kyong Shon
Summary: This study improves the selectivity of lithium ions by modifying the electrode surfaces using the metal-organic framework ZiF-8. The in-situ growth of ZiF-8 on the surface of activated carbon electrodes increases the selectivity of lithium ions compared to bare electrodes.
Review
Environmental Sciences
Anwar Ul Haq Khan, Ravi Naidu, Raja Dharmarajan, Cheng Fang, Hokyong Shon, Zhaomin Dong, Yanju Liu
Summary: This review focuses on the occurrence and interactions of engineered nanoparticles (ENPs) and brominated flame retardants (BFRs) in water systems, as well as the formation of complex compounds in the environment. It summarizes the release of ENPs and BFRs, their key interaction mechanisms, and their influence on the behavior and toxic effects of PBDEs. The study highlights the distinct behavior of mixed compounds (ENPs-BFRs) and emphasizes the importance of understanding the interactions in comprehensive risk assessments.
JOURNAL OF ENVIRONMENTAL SCIENCES
(2023)
Article
Engineering, Chemical
Mohammad Mahbub Kabir, Mst. Mahmoda Akter, Zhenguo Huang, Leonard Tijing, Ho Kyong Shon
Summary: This study comprehensively evaluates the role of water industries in hydrogen production from a circular economy perspective, providing significant insights for future hydrogen energy development.
Article
Chemistry, Multidisciplinary
Tasneem Elmakki, Sifani Zavahir, Umme Hafsa, Leena Al-Sulaiti, Zubair Ahmad, Yuan Chen, Hyunwoong Park, Ho Kyong Shon, Yeek-Chia Ho, Dong Suk Han
Summary: In this study, alpha-LiAlO2 was used as a Li-capturing positive electrode material to recover Li from aqueous Li resources. The material synthesis was cost-effective and low-energy. It showed selective capture of Li+ ions in the concentration range of 100 mM to 25 mM. The system demonstrated the ability to handle complex solutions such as seawater reverse osmosis brine.
Review
Biochemistry & Molecular Biology
Hyeon Tae Kim, Morteza Afsari, Noel Peter B. Tan, Ho Kyong Shon, Leonard D. Tijing
Summary: Thermally localized solar-driven water evaporation (SWE) has been increasingly developed in recent years for cost-efficient freshwater production. Multistage SWE systems, with their simple structure and high solar-to-thermal conversion rates, have attracted much attention. In this study, currently designed multistage SWE devices were reviewed and examined based on their characteristics and performances. The key factors to consider include heat and mass transport, conversion efficiency, water production rate, and kWh/number of stages. These reviewed designs have the potential to be adopted for small-scale solar desalination, providing sufficient freshwater in regions with limited access.
Article
Engineering, Environmental
Sharaniya Roobavannan, Youngwoo Choo, Dai Quyet Truong, Dong Suk Han, Ho Kyong Shon, Gayathri Naidu
Summary: Lithium (Li) is increasing in value due to its use in energy storage devices for electric vehicles. Seawater mining of Li is a sustainable alternative to conventional land mining. In this study, a hybrid nanomaterial, HMO@ZIF, was developed to selectively adsorb Li from seawater. The encapsulation of zeolitic imidazolate frameworks (ZIF) onto hydrogen manganese oxide (HMO) particles led to improved Li uptake through increased surface area, additional functional groups, and zinc ion intercalation.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Chemical
Jiaxi Jiang, Pema Dorji, Umakant Badeti, Weonjung Sohn, Stefano Freguia, Sherub Phuntsho, Ibrahim El Saliby, Ho Kyong Shon
Summary: Human urine is a valuable source of fertilisers, and this study investigated the use of a hybrid MBR and MCDI system for nutrient removal and recovery. The results showed that MCDI effectively removed nitrate, phosphate, and ammonium from the treated urine, and achieved high recovery rates in the concentrated brine. The study further demonstrated the feasibility of using MCDI for nutrient recovery without the need for chemical additives.
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, Environmental
Junghyun Kim, Leonard Tijing, Ho Kyong Shon, Seungkwan Hong
Summary: Membrane distillation (MD) has potential for high salinity treatment and zero liquid discharge (ZLD), but faces challenges in fouling and scaling under high recovery conditions. This study proposes alternating current (AC) operation for electrically conductive membrane distillation (ECMD) to control both cations and anions, increasing water recovery by 27%.
Article
Engineering, Chemical
Mohammad Mahbub Kabir, Golam Md. Sabur, Mst. Mahmoda Akter, Sang Yong Nam, Kwang Seop Im, Leonard Tijing, Ho Kyong Shon
Summary: This paper explores the integration of electrodialysis (ED) technology in the water industries (WIN) for sustainable desalination, resource, and energy recovery. The authors provide a comprehensive analysis of recent advancements and conduct a techno-economic and environmental sustainability analysis. They also discuss the use of ED for energy recovery and assess scaling-up issues based on recent scientific findings. The study offers novel insights for the development of a sustainable closed-loop economy in the water industries.
Article
Engineering, Chemical
Weonjung Sohn, Jiaxi Jiang, Sherub Phuntsho, Ho Kyong Shon
Summary: This study demonstrates that incorporating biofilm carriers and powdered activated carbon in a membrane bioreactor enhances nitrification rates and reduces hydraulic retention time, resulting in higher energy efficiency and decreased footprint.
Article
Engineering, Chemical
M. S. Sajna, Tasneem Elmakki, Kira Schipper, Seungwon Ihm, Youngwook Yoo, Byungsung Park, Hyunwoong Park, Ho Kyong Shon, Dong Suk Han
Summary: This review paper explores the potential of seawater desalination plants to address the increasing demand for water, energy, mineral resources, and foods, particularly in resource-scarce regions. By utilizing seawater and integrating renewable energy sources, these plants can contribute significantly to sustainable development and promote a circular economy.
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.
