摘要：To investigate the impact of wind direction on the distribution and speciation of heavy metals in the soil near the Pb-Zn ore smelter mine, eight surfacesoil samples following the wind direction were ana-lyzed. Our results indicate that: (1) Cd mainly ex- isted as the acid-soluble state and the reducible frac- tion, while most of the Cr, Cu and Ni existed at the residual fraction; (2) Zn, Cd and Pb in the soil origi- nated from the air dust from the smelter, but Mn, Cu. Co, Ni and Cr were of geological source; (3) The to-tal content of Co, Cu, Ni and Mn in the surface soil in the downwind direction is higher than the upwind direction, indicating that the wind direction is an im- portant factor determining the concentration of heavy metals in the surface soil around the lead-zinc smelter, which will accelerate the pollution in the downwind direction; (4) Based on the Eh-pH dia- gram and chemistry of local acid rain, we find that the acid rain can accelerate the release of heavy met-als from the topsoil; (5) Centered-log ratio transfor- mation (clr) has been proved useful to eliminate the closure effect of geochemical data in soil.
