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Desalination

Energy

Sodium battery contains solution to water desalination

Much scientific effort goes into shoring up both our energy and water supplies for the future, but what if both problems could be addressed by the same technology? Researchers at the University of Illinois have come up with a new battery design that not only relies on salt water to store and release electricity, but removes the salt ions from the water in the process.Read More

Materials

Nanometer-thick membrane a new contender in the quest for more efficient desalination

Engineers from the University of Illinois have used nanotechnology to model a new membrane that can filter salt from seawater at higher volumes than ever before. The membrane is made from a nanometer-thin layer of molybdenum disulfide (MoS2) studded with tiny holes called nanopores. By "pulling" clean water through itself while filtering out salt and other compounds, the membrane has the potential to make desalination plants much more energy-efficient.
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Environment

New desalination technique pushes salt to one side with shockwaves

As access to clean water continues to be an issue throughout the developing world, there's an increased demand for easier ways to turn contaminated and salty water into something you can drink. Researchers at MIT may have found a solution using a method they are calling shock electrodialysis. It uses electric shock waves to separate contaminated or salty water into two separate streams, with a natural barrier between each one. Read More

Environment

Cheap, simple technique turns seawater into drinking water​

Researchers from the University of Alexandria have developed a cheaper, simpler and potentially cleaner way to turn seawater into drinking water than conventional methods. The breakthrough, which could have a huge impact on rural areas of the Middle East and North Africa, improves on an existing method of separating liquids and solids known as pervaporation by using a new salt-attracting membrane embedded with cellulose acetate powder.Read More

Environment

Desolenator churns out clean drinking water using solar power

Desalination may one day prove the savior for regions of the world where clean drinking water is scarce, but current technology dictates that this process is often expensive and energy-intensive. The team behind the Desolenator has high hopes of delivering water security to those in need, with a mobile desalinator that runs purely on energy from the sun. Read More

Environment

The Odyssée desalinator: Using the power of the ocean to cleanse its own salty waters

Watching on as the waves crashed against the cliffs of South Corsica, France, mechanical engineer Dragan Tutić knew some were already drawing on power from the ocean to generate electricity. But a possible use for all that motion in the ocean that had been largely unexplored, as far as he knew, was turning its salty seawater into the fresh, drinkable variety on the spot. In the following two and a half years, Tutić and his team designed and tested a prototype for a wave-powered desalinator, and now hold hopes of deploying the system in regions where water scarcity threatens the survival of coastal communities. Read More

Environment

IBM "sunflowers" to supply off-grid energy, water, and cooling

Looking rather like a 10-meter (33 ft) tall sunflower, IBM's High Concentration PhotoVoltaic Thermal (HCPVT) system concentrates the sun’s radiation over 2,000 times on a single point and then transforms 80 percent of that into usable energy. Using a number of liquid-cooled microchannel receivers, each equipped with an array of multi-junction photovoltaic chips, each HCPVT can produce enough power, water, and cooling to supply several homes.Read More

Environment

Huge reserves of freshwater lie beneath the ocean floor

Scientists in Australia have reported the discovery of huge freshwater reserves preserved in aquifers under the world's oceans. The water has remained shielded from seawater thanks to the accumulation of a protective layer of sediment and clay. And it’s not a local phenomenon. Such reserves are to be found under continental shelves off Australia, China, North America and South Africa.Read More

Science

Scientists developing a seawater-desalination chip

Although various alternative technologies are being developed, the large-scale desalination of seawater typically involves forcing it through a membrane that allows the water to pass through, but that traps the salt. These membranes can be costly, they can get fouled, and powerful pumps are required to push the water through. Now, however, scientists from the University of Texas at Austin and Germany’s University of Marburg are taking another approach. They’ve developed a chip that separates salt from water. Read More

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