Effect of Water Quality Produced at Each Stage of the Seawater Desalination Process on Hydrogen Production in Water Electrolysis
Source abstract
Abstract
Hydrogen production via water electrolysis using desalinated seawater offers a sustainable energy solution and has attracted considerable attention in recent years. However, its efficiency depends heavily on the quality of water. Many studies have not explored the relationship between treated water quality and hydrogen generation efficiency at each stage of the seawater desalination process. This study examines a three-step seawater desalination process comprising softening with ballasted flocculation (SBF) as a pretreatment, reverse osmosis (RO) as the main desalination step, and ion exchange as a polishing step to provide high-quality water for electrolysis. Water from each purification stage was supplied to the electrolyzer to compare the impact on water quality and hydrogen generation efficiency. The SBF process removed magnesium (Mg) and calcium (Ca) from seawater, as well as turbidity and bacteria, but hydrogen production via water electrolysis continued for no more than 10 h. However, when feeding RO water and RO water processed by ion exchange after the SBF process, hydrogen was generated stably and continuously for 70 h, achieving high efficiency comparable to that of commercial pure water. High production of green hydrogen by water electrolysis is possible through RO seawater desalination combined with SBF pretreatment.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Anaerobic Digestion and Biogas Production · Hybrid Renewable Energy Systems · Membrane Separation Technologies
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Interdisciplinary Graduate School of Agriculture and Engineering, University of Miyazaki, 1-1 Gakuen Kibanadai-nishi, Miyazaki 889-2192, Japan
Graduate School of Engineering, University of Miyazaki, 1-1 Gakuen Kibanadai-nishi, Miyazaki 889-2192, Japan
Faculty of Science and Engineering, Chuo University, 1-13-27 Kasuga, Bunkyo-ku, Tokyo 112-8551, Japan
Faculty of Engineering, University of Miyazaki, 1-1 Gakuen Kibanadai-nishi, Miyazaki 889-2192, Japan
GX Research Center, University of Miyazaki, 1-1 Gakuen Kibanadai-nishi, Miyazaki 889-2192, Japan
References (55)
Show source-provided references
1. Hydrogen Production by Traditional and Novel Alkaline Water Electrolysis on Nickel or Iron Based Electrocatalysts10.1039/D3CC00996C ↗
2. Recent Advances in Hydrogen Production through Proton Exchange Membrane Water Electrolysis—A Review10.1039/D3SE00336A ↗
3. Design and Performance Analyses of Graphene-Nano Plasmonic Devices for Wireless Gas Sensor Applications10.1016/j.ijhydene.2022.12.123 ↗
4. Tailored Water–Surface Interactions on Cobalt Oxide for Stable Proton-Exchange-Membrane Water Electrolysis10.1038/s41929-025-01476-6 ↗
5. Hydrogen and Fuel Cell Strategy Council (2019). The Strategic Road Map for Hydrogen and Fuel Cell.
6. U.S. Geological Survey (2026, January 27). How Much Water Is There on Earth?, Available online: https://www.usgs.gov/water-science-school/science/how-much-water-there-earth.
7. Chougradi, A., Zaviska, F., Abed, A., Harmand, J., Jellal, J.-E., and Heran, M. (2021). Batch Reverse Osmosis Desalination Modeling under a Time-Dependent Pressure Profile. Membranes, 11.10.3390/membranes11030173 ↗
8. Current Trends and Future Prospects in the Design of Seawater Reverse Osmosis Desalination Technology
9. Water Electrolysis for Hydrogen Production: From Hybrid Systems to Self-Powered/Catalyzed Devices10.1039/D3EE02467A ↗
10. Gao, L., Yoshikawa, S., Iseri, Y., Fujimori, S., and Kanae, S. (2017). An Economic Assessment of the Global Potential for Seawater Desalination to 2050. Water, 9.10.3390/w9100763 ↗
11. Effects of Membrane Fouling and Scaling on Boron Rejection by Nanofiltration and Reverse Osmosis Membranes10.1016/j.desal.2011.06.019 ↗
12. Fouling Investigation of a Full-Scale Seawater Reverse Osmosis Desalination (SWRO) Plant on the Red Sea: Membrane Autopsy and Pretreatment Efficiency10.1016/j.desal.2020.114536 ↗
13. Dextran Fouling of Polyethersulfone Ultrafiltration Membranes—Causes, Extent and Consequences10.1016/j.memsci.2007.03.027 ↗
14. Biofouling in Forward Osmosis Systems: An Experimental and Numerical Study10.1016/j.watres.2016.09.031 ↗
15. Miyakawa, H., Maghram Al Shaiae, M., Green, T.N., Ito, Y., Sugawara, Y., Onishi, M., Fusaoka, Y., Farooque Ayumantakath, M., and Saleh Al Amoudi, A. (2021). Reliable Sea Water Ro Operation with High Water Recovery and No-Chlorine/No-Sbs Dosing in Arabian Gulf, Saudi Arabia. Membranes, 11.10.3390/membranes11020141 ↗
16. Morphometric Characterization of Calcium Sulfate Dihydrate (Gypsum) Scale on Reverse Osmosis Membranes10.1016/j.memsci.2004.12.023 ↗
17. Fouling of Reverse Osmosis and Nanofiltration Membranes by Humic Acid—Effects of Solution Composition and Hydrodynamic Conditions10.1016/j.memsci.2006.12.017 ↗
18. Ling, B., Xie, P., Ladner, D., and Battiato, I. (2021). Dynamic Modeling of Fouling in Reverse Osmosis Membranes. Membranes, 11.10.3390/membranes11050349 ↗
19. Tools for Membrane Autopsies and Antifouling Strategies in Seawater Feeds: A Review10.1016/j.desal.2005.01.013 ↗
20. State-of-the-Art of Reverse Osmosis Desalination Pretreatment10.1016/j.desal.2014.10.039 ↗
21. Pre-Treatment Strategies for Seawater Desalination by Reverse Osmosis System10.1016/j.desal.2008.09.010 ↗
22. Diphenolic Schiff Bases as Corrosion Inhibitors for Aluminium in 0.1 M HCl: Potentiodynamic Polarisation and EQCM Investigations10.1016/j.corsci.2011.07.018 ↗
23. Mono- and Dicationic Benzothiazolic Quaternary Ammonium Bromides as Mild Steel Corrosion Inhibitors. Part II: Electrochemical Impedance and Polarisation Resistance Results10.1016/j.corsci.2011.01.055 ↗
24. Impact of Coagulation Conditions on the In-Line Coagulation/UF Process for Drinking Water Production10.1016/S0011-9164(02)00582-9 ↗
25. Study on Different Ultrafiltration-Based Hybrid Pretreatment Systems for Reverse Osmosis Desalination10.1016/j.desal.2015.05.020 ↗
26. Design Features of a 20 Migd SWRO Desalination Plant, Al Jubail, Saudi Arabia10.1016/S0011-9164(98)00068-X ↗
27. Comparative Study of the Synergistic Effect of ATMP and DTPMPA on CaSO4 Scale Inhibition and Evaluation of Induction Time Effect10.1016/j.jwpe.2017.11.013 ↗
28. Yoshimura, R., Wai, S., Ota, Y., Nishioka, K., and Suzuki, Y. (2022). Effects of Artificial River Water on PEM Water Electrolysis Performance. Catalysts, 12.10.3390/catal12090934 ↗
29. Precipitation Softening: A Pretreatment Process for Seawater Desalination10.1007/s11356-013-2237-1 ↗
30. Reverse Osmosis Membrane-Based Pretreatment for the Quantification of N-Nitrosodimethylamine Concentrations in High-Matrix Water Samples10.1039/D3EW00222E ↗
31. (2026, January 27). ACTIFLO® Softening. Available online: https://www.veoliawatertech.com/en/technologies/actiflo-softening.
32. Industrial Waste Waters Re-Use: Application of 3FM® High Speed Filtration and High Rate Softening as Pre-Treatment of Wastewaters from the High Water Consuming Pulp&Paper Sector10.2175/193864711802765345 ↗
33. Development of Softening and Ballasted Flocculation as a Pretreatment Process for Seawater Desalination through a Reverse Osmosis Membrane10.1038/s41545-023-00226-0 ↗
34. Tailor-Made High-Performance Reverse Osmosis Membranes by Surface Fixation of Hydrophilic Macromolecules for Wastewater Treatment10.1039/C9RA02240F ↗
35. Treatment of Nanofiltration and Reverse Osmosis Concentrates: Comparison of Precipitative Softening, Coagulation, and Anion Exchange10.1016/j.watres.2011.06.035 ↗
36. Highly Efficient Water Desalination by Capacitive Deionization on Biomass-Derived Porous Carbon Nanoflakes10.1016/j.seppur.2020.117771 ↗
37. Optimum Conditions for High-Speed Solid–Liquid Separation by Ballasted Flocculation10.2166/wst.2023.204 ↗
38. A Comprehensive Review on PEM Water Electrolysis10.1016/j.ijhydene.2013.01.151 ↗
39. Optimization of Porous Current Collectors for PEM Water Electrolysers10.1016/j.ijhydene.2008.11.056 ↗
40. State of Understanding of Nafion10.1021/cr0207123 ↗
41. Measurement of the Protonic and Electronic Conductivities of PEM Water Electrolyzer Electrodes10.1021/acsami.0c12111 ↗
42. Technical Review and Evaluation of the Economics of Water Desalination: Current and Future Challenges for Better Water Supply Sustainability10.1016/j.desal.2012.10.015 ↗
43. Performance Recovery of Proton Exchange Membrane Electrolyzer Degraded by Metal Cations Contamination10.1016/j.ijhydene.2023.12.049 ↗
44. Reverse Osmosis Desalination: Water Sources, Technology, and Today’s Challenges10.1016/j.watres.2009.03.010 ↗
45. Thymine-Mediated Electrochemical Aptasensor for Sensitive and Simultaneous Detection of Hg2+ and CH3Hg+ in Fish Samples10.1016/j.electacta.2023.142406 ↗
46. Direct Seawater Electrolysis for Green Hydrogen Production: Electrode Designs, Cell Configurations, and System Integrations10.1039/D5EE01093D ↗
47. Surface and Interfacial Engineering of Electrocatalysts for Seawater Electrolysis10.1021/acs.accounts.5c00812 ↗
48. Pretreatment Processes for Seawater Reverse Osmosis Desalination Systems—A Review10.1016/j.jwpe.2019.100926 ↗
49. Trickling Filters for Upgrading Low Technology Wastewater Plants for Nitrogen Removal10.2166/wst.2004.0801 ↗
50. Fifteen Years of R&D Program in Seawater Desalination at KISR Part I. Pretreatment Technologies for RO Systems10.1016/S0011-9164(01)00146-1 ↗
51. A Short Review on Reverse Osmosis Pretreatment Technologies10.1016/j.desal.2014.09.017 ↗
52. Sustainable Seawater Reverse Osmosis Desalination as Green Desalination in the 21st Century
53. Effects of Finite Flux and Flushing Efficacy on Specific Energy Consumption in Semi-Batch and Batch Reverse Osmosis Processes10.1016/j.desal.2020.114646 ↗
54. Mesoporous LaFeO3 Perovskite as an Efficient and Cost-Effective Oxygen Reduction Reaction Catalyst in an Air Cathode Microbial Fuel Cell10.1016/j.ijhydene.2023.01.123 ↗
55. Comparative Assessment of Ion-Exchange/Reverse Osmosis and Ultrafiltration/Reverse Osmosis for Seawater Desalination: Environmental, Economic, and Operational Perspectives10.1007/s11356-024-35447-4 ↗