My first thought on seeing that black plastic paper was actually 'is Chemosphere a real journal?' While it is, and that study's flaws do not appear to be the result of any malfeasance, it looks prudent to be skeptical of Chemosphere...
https://retractionwatch.com/2024/12/18/journal-that-published-viral-study-on-black-plastic-removed-from-major-index/
https://retractionwatch.com/2024/12/18/journal-that-published-viral-study-on-black-plastic-removed-from-major-index/
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https://retractionwatch.com/2024/05/13/publisher-slaps-60-papers-in-chemistry-journal-with-expressions-of-concern/