Researchers at MIT have developed an innovative “bubble wrap” that captures drinking water from the air, even in extreme droughts like those found in Death Valley. This new technology aims to address the global need for safe drinking water, functioning effectively wherever there’s moisture in the air.
The device uses hydrogel, a material known for its ability to absorb water, sandwiched between two layers of glass—similar to a window. At night, it collects water vapor, and during the day, the moisture condenses on the cool glass surface and drains into a collection system.
The unique design resembles a series of swollen domes, much like bubble wrap, which maximize the surface area, enhancing water absorption. In tests conducted in Death Valley, the device produced between 57 and 161.5 milliliters of water daily. In more humid climates, the output could be even greater, all without requiring electricity to operate.
Quality is also a key focus. Many water-harvesting designs previously suffered from contamination, as lithium salts used to improve water absorption leaked into the collected water. However, this new model incorporates glycerol, which minimizes leakage to an acceptable level. The US Geological Survey suggests that lithium levels below 0.06 parts per million are safe for drinking, making this design a big step forward.
While one panel may not supply enough water for an entire household, several can be set up together. Researchers estimate that using eight panels measuring 3 by 6 feet could provide sufficient water for families lacking access to clean drinking water. Compared to the cost of bottled water, this system could pay for itself in less than a month and last over a year.
“Imagine deploying multiple panels with a small footprint—they can be arranged vertically,” said Xuanhe Zhao, a co-author and professor at MIT. He believes this technology can make a significant difference in water-scarce areas.
As water scarcity continues to affect around 2 billion people globally, solutions like this are crucial. Recent studies indicate that climate change could lead to less predictable rainfall patterns, making innovations in water collection more vital than ever. The MIT team plans to expand testing to various environments to assess performance in diverse conditions, showing promise for a wider global impact.
By harnessing the moisture in the air, this advancement exemplifies how tech can tackle pressing environmental issues, laying the groundwork for sustainable water solutions worldwide.