Atmospheric polychlorinated biphenyls in Indian cities: Levels, emission sources and toxicity equivalents

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• 作者：Paromita Chakraborty ; Gan Zhang ; Sabine Eckhardt ; Jun Li ; Knut Breivik ; Paul K.S. Lam ; Shinsuke Tanabe ; Kevin C. Jones
• 关键词：Polychlorinated biphenyls ; Air ; India ; FLEXPART ; HYSPLIT ; Toxicity equivalents
• 刊名：Environmental Pollution
• 出版年：2013
• 出版时间：November, 2013
• 年：2013
• 卷：182
• 期：Complete
• 页码：283-290
• 全文大小：1511 K

文摘

Atmospheric concentration of Polychlorinated biphenyls (PCBs) were measured on diurnal basis by active air sampling during Dec 2006 to Feb 2007 in seven major cities from the northern (New Delhi and Agra), eastern (Kolkata), western (Mumbai and Goa) and southern (Chennai and Bangalore) parts of India. Average concentration of ¦²₂₅PCBs in the Indian atmosphere was 4460 (¡À2200)?pg/m^?3 with a dominance of congeners with 4-7 chlorine atoms. Model results (HYSPLIT, FLEXPART) indicate that the source areas are likely confined to local or regional proximity. Results from the FLEXPART model show that existing emission inventories cannot explain the high concentrations observed for PCB-28. Electronic waste, ship breaking activities and dumped solid waste are attributed as the possible sources of PCBs in India. ¦²₂₅PCB concentrations for each city showed significant linear correlation with Toxicity equivalence (TEQ) and Neurotoxic equivalence (NEQ) values.