GEP  Vol.8 No.7 , July 2020
Sources and Trends of Persistent Organic Pollutants at Three Passive Monitoring Sites in South Africa
Abstract: The Stockholm Convention on Persistent Organic Pollutants (SCPOPs) is an international treaty that operates under the patronage of the United Nations (UN) to control certain chemicals that are considered persistent organic pollutants (POPs). They are of great concern because of their adverse effects on human health and the environment. Exposure to POPs may lead to cancer, infertility, respiratory infections, and other health complications. It is therefore critical to study the degree of human and environmental exposure to these POPs. Passive air sampling was conducted in South Africa to evaluate the presence and trends of persistent organic pollutants at Barberspan (rural agricultural), Vanderbijl Park (urban industrial) and Molopo Nature Reserve (isolated nature reserve). Samples were collected in 2012. Passive air samplers using poly were used for sampling. The Buchi System B-811 automatic extractor was used to analyze for dichloro-diphenyl-trichlorethane (DDT), pentachlorobenzene (PeCB), hexechlorobenzene (HCB) polychlorinated biphenyls (PCBs) and hexachlorocyclohexane (HCH). Sampling was conducted for a period of one year. POPs concentrations were generally low at all sites, but Vanderbijl Park had the highest concentrations. Seasonal changes in concentrations were much the same at the three sites with temperatures and wind patterns being major factors. The presence of these chemicals in Molopo Nature Reserve and Barberspan is evidence of long range transportation over dry semi desert areas. Back-trajectories indicate possible sources, including areas where DDT is used for malaria control. The presence of POPs is areas they have never been in use poses health and environmental risks in these areas.
Cite this paper: Pisa, L. , Mhlanga, N. and Mumbengengwi, P. (2020) Sources and Trends of Persistent Organic Pollutants at Three Passive Monitoring Sites in South Africa. Journal of Geoscience and Environment Protection, 8, 207-218. doi: 10.4236/gep.2020.87012.

[1]   ATSDR (2007). Agency for Toxic Substances and Disease Registry. Hexachlorocyclohexane: Toxicological Profile.

[2]   Barron, M. G., Galbraith, H., & Beltman, D. (1995). Comparative Reproductive and Developmental Toxicology of PCBs in Birds. Comparative Biochemistry and Physiology, 112C, 1-14.

[3]   Batterman, S. A., Chernyak, S. M., Gounden, Y., Matooane, M., & Naidoo, R. (2008). Organochlorine Pesticides in Ambient Air in Durban, South Africa. Science of the Total Environment, 39, 119-130.

[4]   Bhatt, P., Kumar, M. S., & Chakrabarti, T. (2009). Fate and Degradation of POP-Hexa- chlorocyclohexane. Critical Reviews in Environmental Science & Technology, 39, 655-695.

[5]   Bouwman, H., & Kylin, H. (2009). Malaria Control Insecticide Residues in Breast Milk: The Need to Consider Infant Health Risks. Environmental Health Perspectives, 117, 1477-1480.

[6]   Ritter, L., Solomon, K. R., & Forget, J. (2005). Persistent Organic Pollutants: An Assessment Report on DDT, Aldrin, Dieldrin, Endrin, Chlordane, Heptachlor, Hexachlorobenzene, Mirex, Toxaphene, PCBs, Dioxins, and Furans. Report for the International Programme on Chemical Safety (IPCS) within the Framework of the Inter-Organization Programme for the Sound Management of Chemicals (IOMC, 44 p.

[7]   Ross, E. (2004). Yushchenko’s Dioxin Poison Level More Than 6000 Times Higher than Normal.

[8]   Schecter, A., Birnbaum, L., Ryan, J. J., & Constable, J. D. (2006) Dioxins: An Overview. Environmental Research, 101, 419-428.

[9]   UNEP (2001). United Nations Environment Programme. Stockholm Convention on Persistent Organic Pollutants. Geneva, Switzerland.

[10]   UNEP (2005). United Nations Environment Programme. Ridding the World of POPs: A Guide to the Stockholm Convention on Persistent Organic Pollutants. Geneva, Switzerland.

[11]   Wania, F., & Mackay, D. (1996). Tracking the Distribution of Persistent Organic Pollutants. Environmental Science & Technology, 30, 390-396.

[12]   WHO (2008). World Malaria Report 2008. Geneva: World Health Organization.