More than 2.2 billion people lack access to safe drinking water, even in developed countries like United States.
Faced with the crisis of traditional resources such as rivers, lakes, and reservoirs, engineers from MIT have developed a revolutionary system capable of obtaining drinking water directly from the air, without the need for infrastructure or electricity.
How the device works
The system, about the size of a window, uses a vertical panel enclosed in a glass chamber, coated with a cooling layer.
Capture and filtration process
- During the night, black hydrogel in bubble form absorbs water vapor.
- With the sunrise, the vapor is released, condenses on the glass, and flows through a tube, becoming drinking water.
In tests carried out in the Death Valley, one of the driest regions in North America, the device managed to collect up to 161.5 milliliters of drinking water per day, even with a relative humidity of only 21%.
Technological advances in water purification
The core of the system is a highly absorbent hydrogel, which increases the contact surface with air and blocks salt filtration.
Key innovation: the use of glycerol
The design incorporates glycerol, a stabilizer that keeps salts trapped in the hydrogel. The result is clean water, with salt levels within human consumption standards, without the need for additional filtering.
Application and potential of the technology
Researchers tested a half-square meter sample, confirming its efficiency in real conditions.
Its design allows installation in rows or arrays, without taking up large horizontal space. Furthermore, several panels can supply drinking water to an entire household, with better performance in humid and tropical climates.
Key benefits of the system
- Zero emissions: It does not require electricity or fuels, eliminating environmental impact.
- Reusable materials: Hydrogel durability and low maintenance.
- Universal access to water: It works independently of local infrastructure.
- Decentralized water security: Reduces dependence on traditional sources affected by climate change.
- No contaminating chemicals: Avoids the use of chlorine or industrial products.
A scalable solution for the water crisis
This technology represents a key advancement in environmental engineering, offering a sustainable and accessible alternative to address the global water insecurity.
By eliminating the need for infrastructure and electricity, the system could transform access to drinking water, especially in rural areas and communities without supply networks.
