Organochlorine pesticide residues in sediments from the Uganda side of Lake Victoria

Wasswa, John; Kiremire, Bernard T.; Nkedi‐Kizza, Peter; Mbabazi, Jolocam; Ssebugere, Patrick

doi:10.1016/j.chemosphere.2010.09.010

Cited by 70 publications

(41 citation statements)

References 21 publications

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“…Taihu Lake, where the content is up to 6 ng g -1 , Honghu Lake, up to 19.9 ng g -1 , and Baiyangdian Lake, up to 12.8 ng g -1 (Liu et al 2009;Yuan et al 2013;Hu et al 2010). However, the average content of Σ HCH in lake sediments in Poland is comparable to the content of Σ HCH in sediments of those lakes, as well as to the content of HCH in the sediments of lakes from Svalbard Island (Norway), which contain from 0.8 to 6.5 ng g -1 Σ HCH, the sediments of Lake Victoria (Uganda), which contain up to 5.48 ng g -1 γ-HCH, or the sediments of Lake Manyas (Turkey), referred to as Bird Paradise, which contain 1.08 ng g -1 α-HCH, 1.95 β-HCH and 0.46 ng g -1 γ-HCH on average (Jiao et al 2009;Erkmen et al 2013;Wasswa et al 2011). The maximum content of Σ HCH in the lake sediments is lower as compared to the content of HCH in river sediments in Poland, which contain up to 122 ng g -1 , e.g.…”

Section: Resultsmentioning

confidence: 99%

Assessment of DDT, HCH and PCB pollution of lake sediments in Poland

Bojakowska

Stasiuk

Wołkowicz

2014

Limnological Review

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In the years 2010-2013, 528 samples of surface sediments were collected from lake depths in the area of Poland. The content of 7 PCB congeners, HCH isomers and p,p’-DDT, p,p’-DDE and p,p’-DDD was determined using the GC-ECD method. The studies showed the common occurrence of organochlorine compounds in lake sediments in Poland. The presence of HCHs, at a concentration above the determination limit, was detected in 83.71% of samples, that of DDTs in 98.86% of samples, and of PCBs in 98.86% of samples. The maximum HCH concentration was 60.7 ng g-1, that of DDTs 602.9 ng g-1, and of PCBs 50.7 ng g-1, while the averages were 6.3 ng g-1, 19.2 ng g-1 and 2.8 ng g-1, respectively. High levels of DDTs are found in sediments of those lakes upon which major towns are located, whereas the highest HCH concentrations are observed in sediments of the lakes upon which holiday centres and agrotourism facilities have developed. The ratio of concentrations of total DDT metabolites to p,p’-DDT was above 2 in almost all samples, and the value was most frequently from several to tens (average 28.3). Sediments of some lakes contain higher concentrations of γ-HCH and DDT metabolites than their PEC values, the content of γ-HCH was higher in 1.89% of the analysed samples, the content of p,p’-DDE in 3.78% of the samples, and the content of p,p’-DDD in 7.38% of the samples. Concentrations of p,p’-DDT and PCB in excess of the PEC value were not found in any of the samples tested.

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Section: Resultsmentioning

confidence: 99%

Assessment of DDT, HCH and PCB pollution of lake sediments in Poland

Bojakowska

Stasiuk

Wołkowicz

2014

Limnological Review

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“…In the past, the channel ended in wetland areas, allowing wastewater to be drained into papyrus swamps before entering the Bay. However, in recent years the wetlands which played the role of secondary treatment have been degraded due to settlement and commercial activities (Wasswa, 2009). The water turbidity in the Bay has increased while the water transparency has declined due to excessive waste input.…”

Section: Study Areamentioning

confidence: 99%

“…These developments coupled with a population of over one million people in its catchment area have resulted in increased pollution (Banadda et al, 2009(Banadda et al, , 2011a(Banadda et al, , 2011bWasswa et al, 2010). Polychlorinated biphenyls (PCBs) have previously been documented in the lake (Ssebugere et al 2013a, b;Ssebugere et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Polychlorinated biphenyls in sediments and fish species from the Murchison Bay of Lake Victoria, Uganda

Ssebugere

Sillanpää

Wang

et al. 2014

Science of The Total Environment

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• High concentrations of PCBs were found at sites near wastewater discharges.• The PCB concentrations were low to moderate compared to other locations worldwide.• Based on the European Commission set TEQ, the fish were fit for human consumption. Polychlorinated biphenyls (PCBs) were determined in sediments and two fish species collected from the Murchison Bay in Lake Victoria, using high resolution gas chromatography coupled to a high resolution mass spectrometer. Total PCB concentrations (Σ 18 PCBs) varied widely with mean values ranging from 777 to 4325 pg g −1 dry weight (dw) for sediments and 80 to 779 pg g −1 wet weight (ww) for fish. The PCB levels in the sediments were significantly higher at the station closest to Nakivubo channel, presumably due to effluents discharged by the channel, which may contain domestically produced commercial PCB mixtures. For fish, the concentrations in Nile perch (Lates niloticus) were significantly greater than those in Nile tilapia (Oreochromis niloticus) at all study stations, possibly due to dietary differences among species. World Health Organization-toxic equivalents (WHO 2005 -TEQs) for the dioxin-like PCBs were 0.04-0.64 pg g −1 dw and 0.01-0.39 pg g −1 ww for sediments and fish, respectively. The non-ortho PCBs exhibited the highest contribution to the Σ 12 TEQs (N75%) compared to the mono-ortho PCBs in both fish species. The TEQs in the present study were lower than many reported worldwide in literature for fish and were within the permissible level recommended by the European Commission, implying that the fish did not pose health hazards related to PCBs to the consumers. a b s t r a c t a r t i c l e i n f o

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“…This may be attributed to slow degradation or recent inputs of the pesticide in the environment. The high percentage composition of o,p'-DDT and p,p'-DDT with respect to total DDT in both wetlands clearly illustrates that DDT usage has not been eradicated yet in the country, and there might be new inputs of the pesticide to the aquatic ecosystems as asserted by (Kyarimpa, 2007;Sebugere et al, 2008;Wasswa, 2009). This situation suggests that, although it was restricted, the illegal use of DDT still continues.…”

Section: Composition Of Ddt In C Werneri From the Urban Wetlandsmentioning

confidence: 99%

“…Although DDT was banned for agricultural and public health purposes in Uganda in the mid 1980's, its derivatives have been detected in sediments (Wasswa, 2009), water (Kasozi et al, 2006) and fish (Bimenya et al, 2007;Kasozi et al, 2006;Kyarimpa, 2007;Ogwok et al, 2009;Sebugere et al, 2008) from various aquatic ecosystems. These derivatives are still slowly being released into aquatic and terrestrial food chains and can reach significant concentrations in animals at higher trophic levels.…”

Section: Introductionmentioning

confidence: 99%

1,1,1-Trichloro-2,2-bis(p-chlorophenyl)ethane (DDT) and its derivatives in marketed Clarius werneri caught from Ugandas major urban wetlands

Nnamuyomba¹,

Mbabazi²,

Ntale³

2014

J. Toxicol. Environ. Health Sci.

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The presence of 1,1,1-trichloro-2,2-bis(p-chlorophenyl)ethane (DDT) and derivatives in the Clarius werneri of Uganda's major urban wetland ecosystems was investigated. Solid dispersion extraction method for extraction, florisil column method for clean-up, gas chromatograph equipped with an electron capture detector (GC-ECD) for analysis and gas chromatograph equipped with mass spectrophotometer (GC-MS) for confirmation of results were used in this study. The major DDT contaminants detected in the samples were p,p'-DDD, p,p'-DDE and p,p'-DDT which were found in 25

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Organochlorine pesticide residues in sediments from the Uganda side of Lake Victoria

Cited by 70 publications

References 21 publications

Assessment of DDT, HCH and PCB pollution of lake sediments in Poland

Assessment of DDT, HCH and PCB pollution of lake sediments in Poland

Polychlorinated biphenyls in sediments and fish species from the Murchison Bay of Lake Victoria, Uganda

1,1,1-Trichloro-2,2-bis(p-chlorophenyl)ethane (DDT) and its derivatives in marketed Clarius werneri caught from Ugandas major urban wetlands

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