Belastung von verkehrsflächenabflüssen mit schwermetallen -ein europäischer vergleich

Traffic area runoff waters are polluted by several organic and inorganic substances. The most concerning inorganic substances are the heavy metals zinc, copper, lead, nickel, chromium and cadmium. The discharge concentration in traffic area runoff waters depends on site-specific factors, which are composed of fixed-site conditions of the drainage area and climatic conditions, and method-specific influencing factors. These factors also determine the partitioning of heavy metals between the dissolved and the particulate phase. This distinction is relevant for the evaluation of the runoff toxicity and for its management in two-stage treatment plants. Historical trends and the impact of the traffic area categories parking lots, roads and highways on European runoff concentrations are described and evaluated.