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Article

The Research on H2O Adsorption Characteristics of Lunar Regolith Simulants: Implications for the Development and Utilization of Lunar Water Resources

by
Yanan Zhang
1,2,3,
Ziheng Liu
1,2,4,*,
Rongji Li
1,2,
Xinyu Huang
1,2,3,
Jiannan Li
1,2,
Ye Tian
5,
Junyue Tang
4,
Fei Su
1,2 and
Huaiyu He
1,2,3
1
Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China
2
Institutes of Earth Science, Chinese Academy of Sciences, Beijing 100029, China
3
College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
4
Department of Mechatronic Engineering, Harbin Institute of Technology, Harbin 150001, China
5
Light Industry College, Harbin University of Commerce, Harbin 150001, China
*
Author to whom correspondence should be addressed.
Water 2025, 17(18), 2777; https://doi.org/10.3390/w17182777
Submission received: 13 August 2025 / Revised: 16 September 2025 / Accepted: 17 September 2025 / Published: 19 September 2025
(This article belongs to the Section Hydrogeology)

Abstract

This study prepared an adsorption-based water-containing lunar regolith simulant under low-temperature conditions to investigate H2O behavior in simulated lunar environments. Experiments established that water binds to regolith particles via adsorption rather than existing in liquid/solid states, with critical initial pressure thresholds identified at various temperatures to ensure pure adsorption conditions. Crucially, coexisting substances extend H2O preservation to −100 °C, suggesting substantial water retention in lunar polar regolith even under extreme cold. Sublimation modeling further revealed phase transition boundaries, indicating water ice likely persists in both permanently shadowed regions and illuminated polar areas. These findings provide fundamental insights into: adsorption-driven enrichment/preservation mechanisms of lunar water, thermodynamic stability thresholds at ultralow temperatures, and water ice distribution patterns across lunar polar terrains. The data advance understanding of lunar water’s stability and extractability, offering critical scientific support for future in situ resource utilization and sustained lunar exploration.
Keywords: lunar polar regolith simulant; water; adsorption characteristics; phase transition lunar polar regolith simulant; water; adsorption characteristics; phase transition

Share and Cite

MDPI and ACS Style

Zhang, Y.; Liu, Z.; Li, R.; Huang, X.; Li, J.; Tian, Y.; Tang, J.; Su, F.; He, H. The Research on H2O Adsorption Characteristics of Lunar Regolith Simulants: Implications for the Development and Utilization of Lunar Water Resources. Water 2025, 17, 2777. https://doi.org/10.3390/w17182777

AMA Style

Zhang Y, Liu Z, Li R, Huang X, Li J, Tian Y, Tang J, Su F, He H. The Research on H2O Adsorption Characteristics of Lunar Regolith Simulants: Implications for the Development and Utilization of Lunar Water Resources. Water. 2025; 17(18):2777. https://doi.org/10.3390/w17182777

Chicago/Turabian Style

Zhang, Yanan, Ziheng Liu, Rongji Li, Xinyu Huang, Jiannan Li, Ye Tian, Junyue Tang, Fei Su, and Huaiyu He. 2025. "The Research on H2O Adsorption Characteristics of Lunar Regolith Simulants: Implications for the Development and Utilization of Lunar Water Resources" Water 17, no. 18: 2777. https://doi.org/10.3390/w17182777

APA Style

Zhang, Y., Liu, Z., Li, R., Huang, X., Li, J., Tian, Y., Tang, J., Su, F., & He, H. (2025). The Research on H2O Adsorption Characteristics of Lunar Regolith Simulants: Implications for the Development and Utilization of Lunar Water Resources. Water, 17(18), 2777. https://doi.org/10.3390/w17182777

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