In order to solve present and future water concerns, this Collection brings together interdisciplinary research centered on technology innovation and sustainable engineering solutions. Recognizing the essential role of water in public health, industrial development, environmental protection, and energy systems, it places an emphasis on the development of cutting-edge technologies for enhancing water quality, treatment efficiency, resource recovery, and sustainable water usage.

Emerging water treatment and remediation technologies, such as sophisticated materials, adsorption procedures, membrane systems, wastewater treatment, desalination, pollutant monitoring, and circular water management techniques, are given special consideration. The collection also examines the expanding relationship between energy and water systems, emphasizing resource recovery, decentralized treatment systems, energy-efficient treatment technologies, and innovations that support sustainable energy development and water security at the same time.

This Collection aims to promote high-impact research that integrates fundamental science, applied engineering, and technological innovation to develop resilient and sustainable solutions for future water and energy challenges.

Keywords: Sustainable materials, water contamination; advanced water treatment; integrated water management; adsorption process.

This Collection supports and amplifies research related to SDG 6.

This Collection aims to provide a comprehensive platform for showcasing interdisciplinary research related to the appraisal and management of water resources.

The energy sector relies heavily on water resources, using substantial amounts to meet our energy needs. The sustainability of water resources should be both quantitative and qualitative, preserving their thermal and chemical characteristics before and after energetic use. One of the key focuses of the collection is the sustainable use of water as a geothermal source of energy for space heating and cooling, electricity production, as well as a underground thermal energy storage systems.

With growing global water scarcity and increasing demand for reliable water sources, many research efforts are addressing water shortages and helping to secure our energy needs through sustainable ideas, which contribute against energy poverty in remote areas. Additionally, the focus includes considering water resources for multiple purposes that complement the use of water for energy purposes, making them versatile and usable in various contexts of energetic use of waters.

Through interdisciplinary research spanning engineering, hydrogeology, hydrology, thermodynamics, materials science, environmental analysis, economic evaluation and social aspects, this Collection seeks to foster effective and scalable solutions. These diverse fields contribute to understanding the complex interactions between water use and energy production, ultimately aiming to supply decision-makers with the data and frameworks necessary for shaping sustainable water use practices that promote sustainable development, resilience, synergy, and beyond.

Expected contributions may cover recent developments aimed at a more conscious and sustainable use and management of water resources for energetic purposes. This includes applications in industry, water consumption, health, space heating and cooling, as well as thermal energy production (e.g., open loop systems) and storage (e.g., ATES, aquifer thermal energy storage).

Keywords: Sustainable water use; Water resources; Energy sector; Geothermal waters; Geothermal energy; Geothermal heating and cooling; Thermal energy storage; Aquifer Thermal Energy Storage; Interactions between water use and energy production; Open loop systems; Groundwater management; Seawater; Environmental protection; Economic evaluation; Water consumption.

This Collection supports and amplifies research related to SDG 6, SDG 7, SDG 8, SDG 9, SDG 11 and SDG 12.