'Light responsive' technology turns seawater into clean drinking water in less than 30 minutes
Key Excerpts from Article on Website of Daily Mail
Posted: August 16th, 2020
Scientists have developed new technology that can turn seawater into clean drinking water in less than 30 minutes. Researchers based in Australia used a metal-organic framework (MOF), a type of lattice-like crystal, to desalinate water. The hollow framework of pores separates the salty solute within the brackish water or even saltier seawater, in a process known as molecular sieving. Under dark conditions, the framework absorbs salts and other impurities in the water in 30 minutes. The MOF itself is then regenerated for reuse in just four minutes, using sunlight to remove the adsorbed salts. The light-responsive MOF was used to filter harmful particles from water and generate 139.5 litres of clean water per kilogram of MOF per day. Scientists say their technology is more energy-efficient than current desalination practices, including reverse osmosis, and could provide potable water for millions globally. Water scarcity is one of the largest global risks in the upcoming years, according to the World Economic Forum (WEF). Thermal desalination processes by evaporation using solar energy are widely used to produce fresh water, but can be highly energy intensive. 'Sunlight is the most abundant and renewable source of energy on Earth,' said Professor Huanting Wang ... at Monash University in Australia. 'Our development of a new adsorbent-based desalination process through the use of sunlight for regeneration provides an energy-efficient and environmentally-sustainable solution for desalination.'
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