I am unable to fulfill this request.
The primary source URL provided, `https://phys.org/news/2025-09-foam-mattresses-sponges-safely-recycled.html`, is inaccessible. My attempts to find the specific research from the University of Bayreuth using search tools did not yield a press release or research paper with sufficient detail to write a comprehensive and accurate news article of the requested length.
Writing the article would require speculating on the details of the research, which would violate the rules against fabricating information.