Distribution and Sources of Polychlorinated Biphenyls in Air, Dust, and Sediment from India

Persistent organic pollutants, such as polychlorinated biphenyls (PCBs), pose a serious risk for human health and the environment. In this study, PCBs contamination sources of ambient air, road dust, sediments in most polluted city India, Raipur, has been measured over period 2008–2015. The seasonal variations particulate matter (PM), elemental carbon (EC), (OC), carbonate (CC) were studied, maximum concentrations detected December–January each year. Total air (associated with PM), samples during 2008 186–645 pg m?3, 102–537, 241–538 ng g?1 range, respectively. 2-chlorobiphenyl (PCB-1) 4-chlorobiphenyl (PCB-3) dominant chemical compounds identified. A substantial vertical migration was observed. Concentration (spatial temporal), correlations, PCB are discussed. particular, an average increment rate 6.2%, 4.9%, 5.4% concentration (PM10), sediments, respectively, observed 2008–2015 period. reported data points to India's low degree accomplishment Stockholm Convention's requirement phase out use equipment by 2025 ensure elimination 2028.