Metal speciation in environmental health: mercury and arsenic in traditional food; environmental; and human samples from Walpole Island in 2017

Author(s): John Bend, Western University; Brian Branfireun, Western University; Naomi Williams, Walpole Island First Nation Heritage Centre; Judy Peters, Walpole Island First Nation Community Member; Regna Darnell, Western University; Rosemary Williams, Walpole Island First Nation Health Centre; Gerald McKinley, Western University

Summary

400 tonnes of mercury were released into the St Clair River, upstream of WIFN, a health risk. We determined total mer- cury (THg); methylmercury (MeHg); total arsenic (TAs) and chemical species of As in muscle, liver and kidney of traditional food species at WIFN; in sediment and water from 10 sites at WIFN, in raw and processed river water; and in blood, hair and urine of WIFN volunteers. These data, in concert with a food frequency questionnaire (FFQ), can estimate exposures to Hg and As at WIFN.