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EU Researchers Achieve Over 95% Purity in Marine Plastic Sorting
European Union-funded researchers have developed a technology capable of separating contaminated marine plastics at more than 95% purity, potentially improving the recovery of ocean waste for high-quality recycling and industrial applications.
Key Points
- Sorting breakthrough: The EU-funded CUPOLA project demonstrated marine plastic separation with purity exceeding 95%.
- Recycling applications: Researchers investigated pyrolysis and gasification to convert recovered plastics into chemicals, fuels and industrial materials.
- EU research support: Since 2014, the MSCA programme has supported 824 ocean- and water-related projects with €441 million in funding.
- Next development: A pilot-scale facility is proposed to evaluate the technology under real operating conditions.
MONTREAL (Scrap Monster): Researchers supported by the European Union have developed and tested a technology that separates contaminated marine plastic waste with more than 95% purity, addressing a major technical obstacle to recycling plastics recovered from oceans.
The development emerged from the CUPOLA project, funded through the Marie Skłodowska-Curie Actions (MSCA) Staff Exchanges programme. The research forms part of broader European efforts to reduce plastic pollution and develop practical recovery technologies.
Since 2014, MSCA has supported 824 ocean- and water-related research projects through €441 million in EU funding, according to the European Research Executive Agency.
New Sorting Technology Addresses Marine Plastic Contamination
Recycling marine plastics is particularly challenging because recovered waste often contains different polymers mixed with sand, salt and other contaminants. These impurities complicate material separation and limit opportunities for high-quality recycling.
The CUPOLA researchers developed a sorting process capable of separating different plastic fractions at purity levels exceeding 95%, a threshold generally required for high-quality recycling.
ScrapMonster Edge: Sorting Purity Is Only the First Step
The demonstrated achievement is material separation, not full-scale commercial recycling. CUPOLA's sorting process achieved purity above 95%, but researchers still need to establish how the wider recycling system performs outside controlled research conditions.
Industry takeaway: A pilot-scale facility would help assess operating performance and whether the proposed conversion technologies can be applied economically to different marine plastic waste streams.
Researchers Explore Chemicals, Fuels and Industrial Materials
Beyond sorting, the project investigated thermochemical recycling methods, particularly pyrolysis and gasification, to convert recovered plastics into useful products.
Potential applications include industrial chemicals, alternative fuels, functional carbon materials, refinery-compatible hydrocarbons and asphalt.
Researchers also used process modelling and economic assessments to examine the technical and commercial feasibility of the proposed recycling pathways. The suitability and cost of individual conversion technologies depend partly on the composition of the available plastic waste.
Pilot-Scale Testing Is the Next Priority
The next proposed step is to establish a pilot-scale facility to test the technology under actual operating conditions.
Such testing would help determine whether the laboratory findings can be translated into a practical marine plastic recycling process.
