The rhodium archive isn’t about drug preparations with the element rhodium, it’s a defunct drug synthesis website (rhodium.ws) that was run by the user Rhodium.
Their whole post is wildly ironic on so many levels. They barely read the article which did specifically mention the chemicals they claim the article never mentions:
“ The car parts contain deposits like zinc oxide, platinum and rhodium. A laboratory in Antwerp, Belgium is taking a look at the effect of each individual component.”
And then their whole “how to read the news” leads you to absolutely useless information that provides no illumination.
Their entire post is like a replication of exactly what they think is wrong with the news but as a HN comment. Maybe it’s some kind of deeply clever parody…
https://en.m.wikipedia.org/wiki/The_Hive_(website)
Since rhodium is incredibly expensive, I would assume that they are extracting what the catalytic converters are capturing and ingesting that.