Special Issue on Potentially Toxic Trace Elements in Contaminated Sites: Fate, Risk and Remediation

[Extract] The occurrence of potentially toxic elements (PTEs, including As, Cd, Hg and Pb) of both anthropogenic and natural origin in the environment represents an issue of global concern, leading to a general decline in environmental quality in both continental and aquatic systems. These contaminants are easily accumulated in soil and sediment compartments, which may represent both a sink and a potential secondary source of contamination. Indeed, physical and biogeochemical processes may promote the release and mobility of bioavailable forms of PTEs, affecting water quality, biota and human health.