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Enter 2020.12.13 21:10
2020.12.13 21:28 modified
Researchers from the University of Washington, USA.
Additives to prevent tire damage
Inflow causing blood vessel problems
The cause of ‘silver salmon’, which lives in the rivers of the Pacific Ocean and North America, has been found to have died in toxic land rivers for decades due to toxic substances in car tires.
Earlier this month, researchers at the University of Washington in the United States and others discovered that the cause of the massive death of silver salmon over a wide area from northern California to British Columbia in Canada over the past 20 years was It was due to a specific chemical that prevents damage to car tires. . The research results were published in the latest issue of Science, an international academic journal.
The ingredient that the researchers noted that squeezes silver salmon’s breath is a chemical called ‘6PPD-quinone.’ This material is produced from ‘6PPD’, a type of additive that makes car tires less damaged by friction with the asphalt. When 6PPD reacts with ozone gas, it becomes ‘6PPD-quinone’ and is very toxic. The 6PPD-quinone formed in this way spreads on the road and is left unattended, and generally flows into the river when it rains. The 6PPD-quinone introduced into the river becomes the ‘killer’ of silver salmon.
According to the analysis, the silver salmon exposed to 6PPD-quinone became irregular in respiration, lost their balance in the water and rolled over and eventually sank to the river bed and died. Jennifer McIntyre, a Washington State University professor on the research team, told the Los Angeles Times: “There is a need to further investigate how the body of the silver salmon was attacked” and “there is a possibility that there is a problem with the vascular system “. .
In the future, the researchers plan to determine whether 6PPD-quinone harms animals and plants in addition to silver salmon. This is because it has the potential to cause problems in humans as well. However, it is difficult to quickly reduce the frequency of use of rubber tires, which are essential parts of automobiles, so the controversy over 6PPD-quinone is expected to increase in the future.
