Assessment of heavy-metal contamination of floodplain soils due to mining and mineral processing in the Harz Mountains, Germany

摘要: study area was assessed with respect to its heavy-metal load on the basis of current guideline values. The loads soils in have ranges <0.2–200 mg kg−1 for Cd, <10–30,000 Pb, 7–10,000 Cu and 50–55,000 Zn. Mobility heavy metals determined by extraction at different pH acid neutralisation capacity (ANCx) these values also estimate probability that can drop pH=x. ANC ranged from 6 3000 mmol H+ kg−1, −33 800 −74 160 ANC3.5, ANC5.0 ANC6.2, respectively. Together pedological data, experiments permit differentiation between soil units been placed same environmental hazard class total loads.