NOAA’s findings have been provided to the Utah Department of Environmental Quality to help find ways to improve Wasatch Front’s air quality.
into US Magnesium’s contribution to Utah’s air quality challenges. Her team discovered the plant’s role could be far larger than previously known because of its vast amount of bromine emissions, which accelerate chemical reactions that form the microscopic droplets known as fine particulate matter, or PM2.5.
The study concluded that the plant is responsible for 10 to 25% of the PM2.5 choking Salt Lake City’s air during winter inversions, making it the single largest driver of Utah’s air quality troubles., because it’s not asked about,” Womack said. Based on its sampling from overflights, the research estimated that the plant emits nearly 2.5 million pounds of bromine compounds a year.
“It’s related to the complexity of the chemical soup that’s our atmosphere,” Lin said. “When you put certain stuff in, it’s sometimes surprising what stuff comes out the other end.” In this case, the researchers suspect the bromine radicals react with nitrogen oxides, ammonia and organic compounds emitted from other sources to form ammonium nitrate, a leading component of PM2.5, adding to the pollution that gets trapped in Utah’s valleys during winter.
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