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Investigating the temporal trends in PAH, PCB and OCP concentrations in Hartbeespoort Dam, South Africa, using semipermeable membrane devices (SPMDs)
School of Chemistry, University of the Witwatersrand (WITS), Johannesburg, South Africa.
School of Chemistry, University of the Witwatersrand (WITS), Johannesburg, South Africa.
School of Chemistry, University of the Witwatersrand (WITS), Johannesburg, South Africa.
Research Centre for Toxic Compounds in the Environment (RECETOX), Masaryk University, Brno, Czech Republic. (MTM)ORCID-id: 0000-0003-1733-8334
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2014 (Engelska)Ingår i: Water S.A., ISSN 0378-4738, E-ISSN 1816-7950, Vol. 40, nr 3, s. 425-436Artikel i tidskrift (Refereegranskat) Published
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Abstract [en]

The seasonal variability of persistent organic pollutants in Hartbeespoort Dam, South Africa, was investigated using semipermeable membrane devices (SPMDs) as passive samplers. Freely dissolved waterborne polycyclic aromatic hydrocarbons (PAHs), polychlorinated biphenyls (PCBs) and organochlorine pesticides (OCPs) were sampled to investigate seasonal changes in their concentrations. Exposure of the passive samplers was done for 14 days at the same sampling site in each of the four seasons of the year, in 2011. The SPMD-derived analyte amounts enabled the calculation of time-weighted averages of free dissolved waterborne levels of the contaminants. Concentrations ranged from 30.0 ng.l(-1) to 51.5 ng.l(-1) for PAHs, 38 pg l(-1) to 150 pg.l(-1) for PCBs, 9.2 to 10.4 ng.l(-1) for HCHs and 0.3 to 0.8 ng.l(-1) for DDTs, respectively. It was also noted that the winter season generally exhibited higher contaminant concentrations for most compounds studied, which likely reflects the seasonality of their atmospheric deposition. An attempt was also made to identify possible sources of PAH contaminants in the dam by examining PAH ratios. These diagnostic ratios were inclined towards pyrogenic sources of pollution, except for the winter season where both pyrogenic and petrogenic sources likely contribute to the contamination pattern.

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South African Water Research Commission , 2014. Vol. 40, nr 3, s. 425-436
Nyckelord [en]
Hartbeespoort dam; persistent organic pollutants; semipermeable membrane devices; water-dissolved concentrations; temporal trends
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Miljövetenskap
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Miljövetenskap
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URN: urn:nbn:se:oru:diva-49777DOI: 10.4314/wsa.v40i3.5ISI: 000346631300005Scopus ID: 2-s2.0-84901838591OAI: oai:DiVA.org:oru-49777DiVA, id: diva2:918900
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Funding Agencies:

European Regional Development Fund

Ministry of Education of the Czech Republic LM2011028  LO1214

Project "Employment of Best Young Scientists for International Cooperation Empowerment" CZ.1.07/2.3.00/30.0037

European Social Fund

State budget of the Czech Republic

National Research Foundation

Water Research Commission of South Africa

Tillgänglig från: 2016-04-12 Skapad: 2016-04-12 Senast uppdaterad: 2018-09-14Bibliografiskt granskad

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