American Scholars Invented Stamp-sized Water Purification Chip: Separating Pollutants From Water By Magnetic Field

- Jul 08, 2019-

        Water can cause computer chips to malfunction, but a chip made with the first computer technology can purify sewage and save millions of lives. The latest technology, developed by researchers at MIT, uses magnetic fields to separate harmful pollutants from sewage to produce clean drinking water. Researchers say that once the technology is applied on a large scale, it will enable people in many developing countries to avoid diseases and deaths caused by drinking sewage.
        Jongyoon Han, a researcher at MIT who led the study, said: "The chip can separate bacteria and other particles from seawater and brackish water without creating any clogging problems. This may not be a big problem in the United States. But in India, a lot of drinking water is brackish water or brackish water, which is very important. He has published the research in the latest issue of the Journal Natural Nanotechnology.
        The chip is very small, just the size of a common stamp. Using computer chip manufacturing technology for reference, MIT researchers used soft silica gel instead of hard and soft silica gel as the raw material for making such chips. Except for some Y-shaped black diagonals, the whole chip is transparent. Researchers say that the black slant in the chip is actually a very tiny microchannel. When sewage enters the channel, it will soon encounter a strong magnetic field. Anything with positive and negative charges, including dissolved salt ions and bacteria, will be separated by the interference of a strong magnetic field, while pure water will not be affected by the magnetic field because it does not have free charges, and will eventually flow out of the channel.