TY - JOUR
T1 - PCDD/Fs and dioxin-like PCBs in surface sediments from Lake Victoria, East Africa
AU - Ssebugere, Patrick
AU - Kiremire, Bernard T.
AU - Henkelmann, Bernhard
AU - Bernhöft, Silke
AU - Wasswa, John
AU - Kasozi, Gabriel N.
AU - Schramm, Karl Werner
N1 - Funding Information:
Patrick Ssebugere is grateful for a research fellowship by the Germany Academic Exchange Service (code number: A/11/07101 ) and the logistical support from the German Research Center for Environmental Health . The authors wish to thank Godfrey Magezi, Steven Mulinda and John Kasozi for the assistance with field work, and Norbert Fischer for assistance with the laboratory work.
PY - 2013/6/1
Y1 - 2013/6/1
N2 - Surface sediments (<60cm) from the Napoleon Gulf and Thurston Bay on the northern shore of Lake Victoria were analyzed for polychlorinated dibenzo-p-dioxins (PCDDs), polychlorinated dibenzofurans (PCDFs) and dioxin-like polychlorinated biphenyls (dl-PCBs). Fifteen PCDD/Fs and eleven dl-PCBs were found in 75.5% of the samples. The maximum concentrations of PCDD/Fs and dl-PCBs were 44.1 and 136pgg-1 dry weight (dw), respectively. Octachlorodibenzo-p-dioxin was the predominant PCDD/F congener at the Napoleon Gulf and Thurston Bay area. Regarding the dl-PCBs, a variation in levels was observed between the mono-ortho PCBs and non-ortho PCBs, with the former having higher levels than the latter. The PCDD/F and dl-PCB levels, in the sediments of Napoleon Gulf, which is near urban centers and industrial areas were markedly higher (α≤0.05) than those from the Thurston Bay, which is offshore, suggesting that human activities could be sources of the pollutants to the surrounding water resources. World Health Organization-toxic equivalency quotients (WHO-TEQs) lay in the range of 0.07-5.53pgg-1 dw for PCDD/Fs and 0.01-0.23pgg-1 dw for dl-PCBs. 23.1% of samples from the Napoleon Gulf had their results above the set WHOPCDD/Fs-TEQ value.
AB - Surface sediments (<60cm) from the Napoleon Gulf and Thurston Bay on the northern shore of Lake Victoria were analyzed for polychlorinated dibenzo-p-dioxins (PCDDs), polychlorinated dibenzofurans (PCDFs) and dioxin-like polychlorinated biphenyls (dl-PCBs). Fifteen PCDD/Fs and eleven dl-PCBs were found in 75.5% of the samples. The maximum concentrations of PCDD/Fs and dl-PCBs were 44.1 and 136pgg-1 dry weight (dw), respectively. Octachlorodibenzo-p-dioxin was the predominant PCDD/F congener at the Napoleon Gulf and Thurston Bay area. Regarding the dl-PCBs, a variation in levels was observed between the mono-ortho PCBs and non-ortho PCBs, with the former having higher levels than the latter. The PCDD/F and dl-PCB levels, in the sediments of Napoleon Gulf, which is near urban centers and industrial areas were markedly higher (α≤0.05) than those from the Thurston Bay, which is offshore, suggesting that human activities could be sources of the pollutants to the surrounding water resources. World Health Organization-toxic equivalency quotients (WHO-TEQs) lay in the range of 0.07-5.53pgg-1 dw for PCDD/Fs and 0.01-0.23pgg-1 dw for dl-PCBs. 23.1% of samples from the Napoleon Gulf had their results above the set WHOPCDD/Fs-TEQ value.
KW - Dioxin-like polychlorinated biphenyls
KW - Lake Victoria
KW - Polychlorinated dibenzo-p-dioxins
KW - Polychlorinated dibenzofurans
KW - Sediments
UR - http://www.scopus.com/inward/record.url?scp=84876880791&partnerID=8YFLogxK
U2 - 10.1016/j.scitotenv.2013.03.046
DO - 10.1016/j.scitotenv.2013.03.046
M3 - Article
C2 - 23567173
AN - SCOPUS:84876880791
SN - 0048-9697
VL - 454-455
SP - 528
EP - 533
JO - Science of the Total Environment
JF - Science of the Total Environment
ER -