Measurement of air pollution. Free Technical Library News

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Air pollution measurement

25.09.2020

Researchers from the US analyzed existing scientific publications and found that tree leaves can trap magnetic particles that enter the atmosphere along with exhaust gases. The magnetic field of such particles can be detected using special devices, determining the level of air pollution by the leaves of trees.

Employees of the University of Utah collected pine needles from several trees around the campus of the university. Three trees grew near the busy highway, and another was located far from the road. A comparison of the samples showed that the magnetization of the needles depends on the air quality in the area where the tree is located.

In the magnetic particles with which the needles were coated, substances such as titanium, zirconium and vanadium were found. These elements are commonly found in brake dust, plus we know they are released into the atmosphere when fossil fuels are burned.

Now scientists want to install artificial trees in Utah, created from 3D-printed branches with special magnetic sensors. It is assumed that this method of monitoring air pollution will show good results. If expectations are met, then the technology can be applied on a large scale.

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