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New membrane will reduce the cost of water filtration

05.01.2021

Researchers from the University of Texas at Austin and Pennsylvania (USA) have created a new membrane for water purification with a uniform density at the nanoscale. This structure of the membrane allows you to get more clean water and make the filtration process cheaper.

Desalination membranes remove salt and other chemicals from water. The way the purification takes place is a seemingly very simple process: salt water is passed through a filter - pure water flows out from the other side. But there are many subtleties and complexities within the process.

The research team determined that the desalination membranes are incompatible in terms of density and mass distribution, which can hinder their performance. Uniform density at the nanoscale is the key to increasing the amount of pure water that these membranes can produce. The uniform density made the new membrane significantly thicker than current counterparts. However, as previous studies have shown, thick membranes are actually more permeable. This came as a surprise because the thickness was thought to reduce the amount of water that could pass through the membranes.

Scientists have developed three-dimensional reconstructions of the nanoscale structure of the membrane using modern electron microscopes. They modeled the path that water takes through these membranes to predict how efficiently the water could be purified based on the new structure. In the article, the authors report that the efficiency of the membranes has become 30-40% higher. This means that they can purify more water with significantly less energy consumption. The opening could expand access to clean water and lower water bills for both individual homes and large farms.

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Adopting 802.11ax can quadruple the capacity of Wi-Fi networks while extending the battery life of mobile devices. The new SoCs support 12-stream connectivity (eight streams in the 5GHz band and four in the 2,4GHz band), MU-MIMO configurations, 80MHz channels. Another feature is support for OFDMA (Orthogonal Frequency Division Multiple Access) modulation used in cellular networks and traffic scheduling.

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