id="p0005">Iron-steel plant emissions, air and soil levels of PCNs were investigated.
id="p0010">Results indicated that iron-steel production is a major source for PCNs.
id="p0015">Emissions from the scrap preheating process were substantially higher.
id="p0020">Very high atmospheric levels (1620 ± 800 pg m− 3) were measured nearby these plants.