New study of Solar-powered device harvests litres of drinking water from thin air by KAUST.

Researchers at King Abdullah University of Science and Technology (KAUST) have invented a solar-powered device that can extract several liters of water from thin air daily, offering a potential lifeline for people in arid regions.

The system operates in a two-stage cycle that captures water from the air with an absorbent material and then uses sunlight to extract it in a sealed chamber. Unlike traditional two-stage systems that require manual switching, this technology automatically alternates between cycles. Inspired by how plants transport water, the system uses mass transport bridges to connect atmospheric water capture with freshwater generation.

The system generates two to three liters of water per square meter daily, suitable for drinking or farming, and has been successfully tested on crops like Chinese cabbage and desert trees. It operates continuously without maintenance, using cost-effective materials like water-wicking fabric, low-cost salt, and a plastic frame, making it affordable for large-scale use in low-income areas.

This breakthrough joins a surge of new water-harvesting technologies driven by climate-induced water scarcity. Recent innovations include an MIT device that extracts potable water from air using absorbent fins and a NASA spacesuit that recycles urine into drinking water in under five minutes.

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