This themed issue endeavours to address the critical knowledge gap surrounding physical–chemical coupling, a domain that intersects various traditional disciplines such as Hydrogeology, Geochemistry, Geomechanics, Geomicrobiology, and Mineralogy. This gap poses a significant obstacle in tackling contemporary risks in geoenvironmental engineering, including challenges related to geo-energy, waste geological disposal, landfill management, CCS (Carbon Capture and Storage), and chemical soil stabilization and biogeotechnics.
In this issue, our contributors have delved into pioneering theories that underpin physical–chemical coupling processes. One notable paper focuses on the development of a novel mixture coupling theory, rooted in non-equilibrium thermodynamics, which serves as the foundational framework for multiphysics coupling. Specifically, it explores chemical transport in dual porous media (Wang et al., 2024). Another paper investigates the impact of gas transport, as exemplified by the Mont Terri hydrogen transfer experiment, shedding light on gas transfer dynamics between boreholes and claystone formations (Damiani et al., 2024).
Moreover, the issue presents research findings with practical implications for environmental geotechnics. For instance, Abdulnabi et al. (2024) offer a comprehensive geotechnical and geochemical characterization of two diamond ore tailings, contributing valuable insights into waste management practices. Omotoso (2024) introduces a population growth model to predict fine tailings settlement in pit lakes, providing essential guidance for effective lake management strategies.
Biobased materials have emerged as a promising avenue in the realm of physical–chemical coupling. Three papers in this issue explore the application of biobased additives in environmental geotechnics. Orlandi et al. (2024) investigate the impact of different bio-based additives on the expansiveness of Argentinian natural clayey soil (CR-clay). Qiu et al. (2024) describe a new bacterial strain for the solidification and stabilization of municipal solid waste incineration fly ash, Sousa et al. (2024) investigate the effect of precipitation patterns of enzyme-induced calcite on the compressive strength of treated sand.
In conclusion, this themed issue presents a diverse array of research contributions that collectively advance our understanding of physical–chemical coupling in environmental geotechnics. From theoretical frameworks to practical applications, the papers featured in this issue offer valuable insights and solutions to address pressing environmental challenges. We hope that this collection inspires further research and collaboration in this vital area of study.
