environment. In this study, four 75-or 80-cm-deep soil profiles in the vicinity of the
Xikuangshan Sb smelter were sampled and studied by combination of bulk chemical
analysis, sequential extraction procedure, and speciation analysis of Sb and As, which are
in order to assess the vertical mobility of metal/metalloid contaminants (Sb, As, Cd, and Hg).
The heavy contamination in the soil profiles is mostly located in the uppermost soil layers …