Mercury

The transport of PCBs in water
• PCBs enter into water (rivers, lakes and coastal water
bodies) mainly through the process of atmospheric
precipitation and the discharge of industial sewage,
etc.
• PCBs in water is low in amount is low due to their
high volatility and low solubility in water.
• PCBs are absorpt easily by particulate matters so that
PCBs in water are mostly contained on the surface of
suspended particulate matters and finally settle to the
bottom soil. Thus, PCBs in the substrate sludge is 1 to
2 times higher in amount than that in the water around.