Organic contaminants in urban sediments and vertical leaching in road ditches

摘要: This is a study of the environmental impact organic contaminants emitted from urban traffic and road infrastructure in Goteborg, Sweden. The vertical leaching ditches, occurrence stormwater sediment, soil shallow groundwater, have also been investigated. A total 80 specific were analysed sediment sample, these as many 40 identified. concentration semi-volatiles, alkylbenzenes, aliphatics, 4-nonylphenols, mono- di-nonylphenol ethoxylates, carcinogenic US EPA polycyclic aromatic hydrocarbons PAH–16, diethyl hexylphthalate DEHP several brominated flame retardants, all high concentration. Depth profiles, clay, clay/sand sand at four places along highway E20, for compounds. In semi-volatiles (< 2,300 mg∙kg-1dw) PAH-16 1.0 mg∙kg-1 dw) identified concentrations. one decreasing concentrations but until depth 1 m, 1.5 m. reference surface samples, taken centre Even Goteborg 1400 μg∙l-1), 0.4 μg∙l-1) remarkably The deep levels show need efficient construction ditches or treatment runoff water traffic-related areas to prevent contamination. samples that most occurring environments are still unidentified compounds with unknown effects. relative composition indicates rubber tyres, vehicle exhausts asphalt materials be main sources PAH