this post was submitted on 19 Jul 2023
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Does aluminum production produce a lot of heavy metal byproducts? It's a lithophile (it tends to congregate with crust-y rocks and oxygen rather than stuff that ends up in the core or in sulphide deposits) so I'm guessing not.
Not sure in what quantities but a few rare earths do appear in bauxite deposits.
Looking at a table of Goldshmidt classifications, chromium and vanadium should too. None of those are usually called heavy metals, though.