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Assessment of tire wear emission in a road tunnel, using benzothiazoles as tracer in tunnel wash water
Summary
Researchers developed a methodology to quantify tire wear emissions in a road tunnel using benzothiazoles — chemical components of tire rubber — as tracers in tunnel wash water. The approach offers a practical way to estimate how much tire particle pollution, a major source of microplastics, is generated on busy road corridors.
This thesis was performed after recommendations by the Norwegian Public Road Administration in cooperation with the Norwegian institute for Water Research (NIVA), in order to develop a new methodology to quantify tire tread emission in the environment. The physical properties of the tire particle, makes it challenging to detect with existing visual detection methods for microplastics. Benzothiazoles (BTs), organic components in tire tread, has earlier been proposed as tracers for tire wear in road runoff, and was therefore investigated as a possible tracer for tire tread particles (TP) in this study.