Scientists Turn Desert Sand Into Living Water-Holding Soil

Scientists in Switzerland and the United Arab Emirates have found a way to make desert sand hold water like soil, a discovery that could help feed millions as deserts expand worldwide.

The innovation comes at a critical time. The UAE can produce only 10% to 15% of its own food because most of the country is unfarmable desert. And with rapid deforestation and climate change turning more land into desert-like conditions globally, this problem won't stay localized for long.

Researchers at Switzerland's Empa institute and Khalifa University in Abu Dhabi developed what they call "living sand." The concept is elegantly simple: they introduce specific bacteria and fungi into sand, which naturally produce networks of sticky fibers and biopolymers that bind sand particles together. Think of it as mixing sand with nature's own glue.

The results are remarkable. In laboratory tests using both regular sand and sand collected from Abu Dhabi dunes, the bacterial treatment slowed water movement by six times. An even more impressive method using bacteria that produce nanocellulose sheets slowed water seepage by 28 times compared to untreated sand.

The microorganisms need nutrients to grow, but that obstacle has a built-in solution. The bacteria can feed on sugars from organic waste, meaning the "food" they need is already abundantly available.

Regular sand can't support crops because its grains don't stick together like soil particles do. Water rushes straight through the gaps, taking any nutrients with it and leaving plants to wither. The treated sand holds its shape better and keeps water available to plant roots for much longer.

Why This Inspires

This research represents a first step toward reversing desertification rather than just accepting it. The scientists aren't claiming they've created perfect farmland yet, but they've proven that desert sand can be transformed into something that might support plant life.

Gustav Nyström, who heads Empa's Cellulose and Wood Materials laboratory, explains that the approach introduces organic matter and water into sand while stabilizing it enough to enable microorganism and plant growth. The goal is to kickstart a natural process that makes soil increasingly resilient and fertile over time.

The technology is still at the laboratory stage. The next phase will test whether bacteria-treated sand can actually support crops in greenhouse and field conditions. If those trials succeed, the implications stretch far beyond the UAE.

As climate change accelerates and more regions face water scarcity and soil degradation, innovations like living sand could become essential tools for food security. What works in Abu Dhabi's dunes might one day help restore degraded farmland or create new agricultural zones in places previously considered hopeless.

The research was recently published in the journal Carbohydrate Polymers, marking one small but significant step toward greening the world's deserts.