Toxic chemicals found in hundreds of recycled plastics
When scientists examined pellets from recycled plastic collected in 13 countries, they found hundreds of toxic chemicals, including pesticides and pharmaceuticals. Scientists at the University of Gothenburg published the findings in their study. The scientists judged recycled plastics unfit for most purposes, which hindered attempts to create a circular economy.
Delegates, scientists, and health and environmental advocates from around the world travelled to Nairobi, Kenya, for the third session of the Plastics Treaty Intergovernmental Negotiating Committee (INC-3).
Scientists will urge delegates to heed the latest science showing that because toxic chemicals are used to make all plastics and plastics will adsorb other chemicals during use, there are no plastics that can be deemed safe or circular.
“Plastic recycling has been touted as a solution to the plastic pollution crisis, but toxic chemicals in plastics complicate their reuse and disposal and hinder recycling,” says Professor Bethanie Carney Almroth of the University of Gothenburg.
Over 600 chemical compounds were identified.
In a recently published study in Data in Brief via ScienceDirect, led by Carney Almroth, plastic pellets from plastic recycling plants in 13 different countries in Africa, South America, Asia, and Eastern Europe were found to contain hundreds of chemicals, including numerous highly toxic pesticides.
In total, 491 organic compounds were detected and quantified in the pellets, with an additional 170 compounds tentatively annotated. These compounds span various classes, including pesticides, pharmaceuticals, industrial chemicals, and plastic additives.
Risky business
There are few regulations on chemicals in plastics, and international trade in plastic waste complicates this issue.
In a correspondence published this month in the prestigious journal Science, researchers from the University of Gothenburg, IPEN, Aarhus University, and the University of Exeter noted that: “The hazardous chemicals present risks to recycling workers and consumers, as well as to the wider society and environment. Before recycling can contribute to tackling the plastic pollution crisis, the plastics industry must limit hazardous chemicals.” More than 13,000 chemicals are used in plastics, of which 25 per cent are classified as hazardous. Scientists state that: “No plastic chemical [can be] classified as safe.”
Professor Bethanie Carney Almroth brought a clear message to the meeting in Nairobi: “Numerous studies show that hazardous chemicals can accumulate even in relatively close-loop plastic recycling systems. We need to rapidly phase out plastic chemicals that can cause harm to human health and the environment.”