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South African Journal of Science

On-line version ISSN 1996-7489
Print version ISSN 0038-2353

S. Afr. j. sci. vol.103 n.5-6 Pretoria May./Jun. 2007




Inventory of chlorinated dioxin and furan sources and releases in Potchefstroom, South Africa



Laura P. Quinn; Ilse Jordaan; Henk Bouwman; Rialet Pieters

School of Environmental Sciences and Development, Potchefstroom Campus, North-West University, Potchef-stroom 2520, South Africa




South africa ratified the stockholm convention on Persistent Organic Pollutants in 2002, and has to formulate a national implementation plan that includes an inventory of sources and releases of these chemicals. An investigation of polychlorinated dibenzo-p-dioxin, polychlorinated dibenzo-furans (PCDD/Fs) and polychlorinated biphenyls (PCBs) was conducted in the Potchefstroom area, using the UNEP Toolkit. These sources, on which negligible information was available, were identified by means of questionnaires and interviews, and the releases quantified using default emission factors. The total estimated release of PCDD/Fs in the study area was calculated as 0.396 g TEQ(toxic equivalency quotient)/yr. The highest amounts were generated from sewage and sewage treatment (0.120 g TEQ/yr) and waste incineration (0.111 g TEQ/yr). This is the first such inventory conducted in this country, and has identified potential sources for which emission factors could be refined under South African conditions.



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