Although seawater contains a variety of minerals, it is difficult to separate one of them. But now, a group of scientists from Australia and the United States have developed a brand new seawater desalination technology that will not only make the seawater that comes out through the technology available for drinking but also collect lithium ions that can be used for battery production. The key to this technology is metal organic frameworks (MOFs), which have the largest internal surface area of ​​any known material. Theoretically speaking, such a material can be covered with a football field with one g of light, and its complex internal structure can make MOFs the perfect target for capturing, storing, and releasing molecules. Recent studies have found that this material enables MOFs to be used in carbon sponges, high-precision chemical sensors, and urban water filters. The most commonly used water filtration technology at the moment is a reverse osmosis membrane. The principle is quite simple: the pores of the membrane allow the passage of water molecules but not for most pollutants. However, one of the major problems with this technology is that it requires relatively high pressure to press water in the past. However, MOF film has more selectivity and high efficiency. Researchers from Monash University, CSIRO and the University of Texas at Austin have developed such a membrane. This design is inspired by the "ion selectivity" of biological cell membranes, which allow specific ions to pass through. In addition to this, the filter membrane does not need a strong external force like the reverse osmosis membrane. In addition to clean drinking water, MOF membranes also collect lithium ions. Since the global electronics and battery demand for lithium is very high, and seawater is rich in a large number of lithium ions, the birth of the MOF film is good news. In addition, this technology will also be applied to the filtration of industrial wastewater. The study was published in the "Science Advances" magazine.
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