Thallium Associated with Manganese Ore Tailings in a Deactivated Mine in the Western Region of Bahia, Brazil

Thallium (Tl) is a rare metal with toxic effects notably harmful to human health and the environment. In this article, natural occurrence of Tl was evaluated in deactivated manganese mine located Western region Bahia, Brazil. The extraction procedure aqua regia used dissolve soil, sediment, tailings samples. content determined by differential pulse anodic stripping voltammetry (DPASV) (Mn) iron (Fe) flame atomic absorption spectroscopy (FAAS). levels ranged from 0.64 473 mg kg‑1, triggering an alert since most samples (soil sediment) analyzed presented concentrations above 1.0 kg-1, recognized as maximum limit recommended environmental agencies North America Europe.