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PCBs in air, soil and milk in industrialized and urban areas of KwaZulu-Natal, South Africa |
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| Authors: | Batterman S Chernyak S Gouden Y Hayes J Robins T Chetty S |
| Affiliation: | a Environmental Health Sciences, University of Michigan School of Public Health, 109 Observatory Street, Ann Arbor, MI 48109-2029, USA b Centre for Occupational and Environmental Health, University of KwaZulu-Natal, 719 Umbilo Road, Private Bag 7, Congella, 4013 Durban, South Africa c Pollution Control Support Unit, Health Department, eThekwini Municipality, South Africa |
| Abstract: | Information regarding polychlorinated biphenyls (PCBs) in environmental media in Africa is limited. This paper presents results of a monitoring program conducted in KwaZulu-Natal Province, South Africa designed to characterize levels, trends and sources of airborne PCBs. Particulate and vapor samples were sampled over the 2004-2005 period at three sites. The total PCB concentration averaged 128 ± 47 pg m−3, and levels were highest in winter. Tri- through hexa-congeners predominated, and the vapor fraction was predominant. Several tetra- through hexa-chlorinated congeners had levels comparable to those at urban sites in the northern hemisphere, but hepta- through deca-congeners resembled levels at background sites. PCB source areas, deduced using spatial and temporal patterns, compositional information and trajectory analyses, likely included local, regional and global sources. Soils at three rural sites showed high PCB concentrations, and milk from a local dairy showed PCB concentrations comparable to USA levels in year 2000. |
| Keywords: | Airborne contaminants Africa Organochlorine PCBs Transport Vapor Trajectory analysis Soil Milk |
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