Polychlorinated biphenyls (PCBs) in PM10 surrounding a chemical industrial zone in Shanghai, China.

In order to gain comprehensive understanding of status, properties and sources of PCBs pollution at an industrial area in Shanghai, PM10 were collected during the period November 2004-September 2005. The results showed that the mean value of total PCBs in the industrial area was 2,017.22 pg m(-3). Three dioxin-like PCB congeners had a mean value of TEQ of 0.24 pg-TEQ m(-3). The concentrations of PCBs at all sites were higher in colder months than in warmer months. SigmaPCB concentrations were correlated positively with SO2, NO2 and OCPs, while negatively with polycyclic aromatic hydrocarbons (PAHs), ambient temperature, rainfall and wind speed. It could be concluded that the area had been contaminated by PCBs from a local source.