A scientist group at Tufts University Technical School has developed a new filtering technology. Inspired by biology, can help limit a drink-related disease that affects tens of millions of people worldwide and capable of improving environmental treatment, industrial and chemical production as well as mining, and other processes. The researchers have demonstrated that their new polymer membrane can separate fluoride from chloride and other ions - the power bearing atoms with a double selection doubled compared to Other methods. They argue that the application of this technology can prevent fluoride toxicity in the water supply, where these elements appear naturally at high levels for human consumption. Also know that additions Fluoride on water supply can reduce the incidence of tooth decay, but less known is that some groundwater supplies have a high level of natural fluoride content that can lead to serious health problems
. . Long-term contact with excess fluoride can cause fluorine infection, a real situation can weaken teeth, lime and ligaments, leading to bone deformation. The World Health Organization estimates that too high fluoride concentrations in drinking water have caused tens of millions of fluorine infections in the teeth and bones worldwide
Illustration. Function of removing fluoride with relatively inexpensive filters Can protect the community from fluor infection without requiring high pressure filtering method or completely eliminating components and then re-mineralize drinking water. Ayse Asatekin, Associate Professor of Engineering Chemistry and biology at the technical school said: "The potential of ionic selective membrane to reduce excess fluoride in drinking water supply is very encouraging. But the potential usefulness of technology also goes to other challenges. The method we use to produce filtered membranes is easy to expand the scale for industrial applications. The implementation of a relatively simple, low-cost and sustainable filter with the environment can be widely applied to improve agricultural water supply, cleaning chemical waste and improving chemical production " . When developing the design of the synthetic membrane, the group of Asatekin has inspired by biopsy. The cell membrane is significantly selected in allowing ions to enter and out of the cell, they can even things Adjust the internal and external concentration of ions, molecules with high accuracy. Biological ion channels are "paths" for moving ions because they are covered with other charged chemicals groups each other and affinity with different countries. To create a membrane, the asatekin coated with polymer zwitterionic - a polymer in which molecular groups contain negative and positive charges closely - up a foam membrane with narrow holes More than a nanometer
Like the biological ion channels, the very small size of domestic ions interactive ions with coating, allowing some ions to go through fast Much more than other ions. The composition of the polymer coating is designed to filter out fluoride and chloride. Researchers said they could change the composition of polymer zwitterionic to filter different ions. Most membranes now separate molecules with significant differences in particle size or charge, but the methods This French is difficult to filter between single atomic ions together because their size is very small and the charge is nearly the same. In contrast, the asatekin membrane has the ability to separate very small gap ions in atomic diameter with nearly similar charge. . Dịch vụ:
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