ferrocyanides

[pvw2]

Here's a compound containing iron that can cause PD:

sciencedirect.com/science/a...

Quote: It is reported that long-term exposure to ferrocyanides at low-doses would cause neurological damage, leading to Parkinson's syndrome, confusion and mental decline while high doses can cause shortness of breath, fainting, loss of consciousness and even death (Li, Liu, Xie, Kong, & Liu, 2006).

Pollution sources:

des.nh.gov/organization/div...

911metallurgist.com/blog/fe...