Where can TRWP be found?
Studies have suggested that most TRWP finds its way to roadside soils or is removed from the road surface as runoff; a small fraction of TRWP are released to the air.
A study that considered the Seine watershed, France, concluded that more than 60% of TRWP released to freshwater are transported to wastewater treatment. The research indicated that most TRWP finds its way to roadside soils or is removed from the road surface as runoff. A small fraction is released to the air. The same research (part one, part two) estimated that 18% of TRWP is transported to freshwater, with 2%-5% of total TRWP transported to the estuary.
TIP is sponsoring a new study that will refine these numbers and scientific understanding of the flows, transport, and sinks of TRWP in the environment.
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