Ultrafine dust particles that blanket the skies of South Korea largely come from exhaust fumes from vehicles and factories.
Nitrogen oxides and sulfur oxides cause chemical reactions that create ultrafine particles.
Industrial companies have to filter and discharge exhaust gases, which requires catalysts that work at high temperatures.
And raising the temperature of the exhaust gas for catalysts to work is expensive.
This is why a South Korean research team has developed a technology that removes pollutants from exhaust gases at ordinary temperatures.
A special absorption solution with metal ions can remove up to 85 percent of nitrogen oxides and 98 percent of sulfur oxides.
"We developed an absorption solution that can reduce the cause of fine dust in exhaust gases at low temperatures below 100 degrees Celsius."
Pollutants are removed just by passing through the solution.
The researchers plan to complete a system that can replace existing decontamination facilities within the next two years.
While the technology cannot be a solution for pollutants coming from abroad, it can reduce the ultrafine dust generated within Korea, which accounts for about 30 to 50 percent of the country's ultrafine dust.
Park Se-young, Arirang News.