AI Article Synopsis
- Plastic pollution is linked to harmful chemical additives, but how these additives behave in the ocean is not well understood.
- A marine experiment over nine months in New Zealand assessed how weathering affected the chemical profiles of four types of plastics.
- Results showed that weathering significantly impacted polyethylene and oxo-degradable polyethylene, while polyamide 6 and polyethylene terephthalate remained largely unchanged, emphasizing the importance of considering plastic composition changes due to environmental factors when evaluating pollution risks.
Article Abstract
Plastic pollution causes detrimental environmental impacts, which are increasingly attributed to chemical additives. However, the behaviour of plastic additives in the marine environment is poorly understood. We used a marine deployment experiment to examine the impact of weathering on the extractables profile, analysed by liquid chromatography-mass spectrometry, of four plastics at two locations over nine months in Aotearoa/New Zealand. The concentration of additives in polyethylene and oxo-degradable polyethylene were strongly influenced by artificial weathering, with deployment location and time less influential. By comparison, polyamide 6 and polyethylene terephthalate were comparatively inert with minimal change in response to artificial weathering or deployment time. Non-target analysis revealed extensive differentiation between non-aged and aged polyethylene after deployment, concordant with the targeted analysis. These observations highlight the need to consider the impact of leaching and weathering on plastic composition when quantifying the potential impact and risk of plastic pollution within receiving environments.
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| http://dx.doi.org/10.1016/j.marpolbul.2023.115810 | DOI Listing |
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