Does anyone know sites where I could get stable proof that Perna Viridis Shells could be air purifiers?

I’ve asked already if they could be air purifiers. This time I made it a bit more specific. I need stable, easy to understand proof (I’m in 2nd year highschool). And it’s for our investigatory project. Maybe you could also help me why they link Cd,Cu,Pb and Zn to Perna Viridis shells. Thanks sooo much to those who would help!

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