Polychlorinated biphenyls (PCBs) and organochlorine pesticides (OCPs) in harbor sediments from Sea Lots, Port-of-Spain, Trinidad and Tobago

Mohammed, Azad; Peterman, Paul H.; Echols, Kathy R.; Feltz, Kevin P.; Tegerdine, George; Manoo, Anton; Maraj, Dexter; Agard, John; Orazio, Carl E.

doi:10.1016/j.marpolbul.2011.03.043

Cited by 55 publications

(17 citation statements)

References 45 publications

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“…The results were also in the range of data found in sediments from tropical areas in Asia: the Mekong River delta in Vietnam (Carvalho et al, 2008) and riverine and coastal waters of Surabaya in Indonesia (Ilyas et al, 2011). The levels were lower compared to concentrations reported for industrialized areas in Europe and United States of America (Covaci et al, 2005;Vane et al, 2007;Vives et al, 2007;Castells et al, 2008;Jiao et al, 2009;Martinez et al, 2010;Mohammed et al, 2011) (Table 2). The proportion of the 6 indicator PCBs (Σ 6 PCBs) to Σ 18 PCBs in this study were between 80 and 88% (with a mean value of 84%).…”

Section: Statistical Data Analysissupporting

confidence: 57%

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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Section: Statistical Data Analysissupporting

confidence: 57%

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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“…Their sediment concentration ranged from bellow detection limits to tens of ng L −1 as were observed in Deep Bay of China, Bengal Bay of India and Sea Lots of Trinidad (Binelli et al, 2008;Mohammed et al, 2011;Qiu et al, 2009). In comparison, the sediment concentrations of HCHs and DDTs in the JBMA are similar to or higher than most coastal waters in China and other regions, but lower than those reported for typical agricultural watersheds of East China, such as Daliao River, Haihe River and Qiantang River (Sun et al, 2010).…”

Section: Discussionmentioning

confidence: 65%

Distribution and ecological risk assessment of HCHs and DDTs in surface seawater and sediment of the mariculture area of Jincheng Bay, China

Sun

Song

et al. 2015

J. Ocean Univ. China

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The distribution of hexachlorocyclohexanes (HCHs) and dichlorodiphenyltrichloroethanes (DDTs) in the surface seawater and sediment of Jincheng Bay mariculture area were investigated in the present study. The concentration of total HCHs and DDTs ranged from 2.98 to 14.87 ng L −1 and were < 0.032 ng L −1 , respectively, in surface seawater, and ranged from 5.52 to 9.43 and from 4.11 to 6.72 ng g −1 , respectively, in surface sediment. It was deduced from the composition profile of HCH isomers and DDT congeners that HCH residues derived from a mixture of technical-grade HCH and lindane whereas the DDT residues derived from technical-grade DDT and dicofol. Moreover, both HCH and DDT residues may mainly originate from historical inputs. The hazard quotient of α-HCH, β-HCH, γ-HCH and δ-HCH to marine species was 0.030, 0.157, 3.008 and 0.008, respectively. It was estimated that the overall probability of adverse biological effect from HCHs was less than 5%, indicating that its risk to seawater column species was low. The threshold effect concentration exceeding frequency of γ-HCH, p,p '-DDD, p,p'-DDE and p,p'-DDT in sediment ranged from 8.3% to 100%, and the relative concentration of the HCH and DDT mixture exceeded their probable effect level in sediment. These findings indicated that the risk to marine benthos was high and potentially detrimental to the safety of aquatic products, e.g., sea cucumber and benthic shellfish.

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“…The concentration range of OCPs detected in the complex was much higher than those detected in other regions such as in Singapore coastal marine sediments (Wurl and Obbard 2005) and in the coast of Quanzhou Bay in southeast China (Yang et al 2013). The same range of OCP level was detected in harbor sediments from Sea Lots, Port of Spain, Trinidad and Tobago (Mohammed et al 2011). The OCP concentrations in Baiyangdian wetland (China) were in the range 3.60-11.12 ng g −1 (Guo et al 2014) much lower than that determined in our study.…”

Section: Pesticide Concentrations In Sedimentmentioning

confidence: 53%

Pesticides in Ichkeul Lake–Bizerta Lagoon Watershed in Tunisia: use, occurrence, and effects on bacteria and free-living marine nematodes

Salem

Saïd

Aïssa

et al. 2015

Environ Sci Pollut Res

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This study aimed to identify the most commonly used agricultural pesticides around Ichkeul Lake-Bizerta Lagoon watershed. First survey of pesticide use on agricultural watershed was performed with farmers, Regional Commissioner for Agricultural Development, and pesticide dealers. Then, sediment contamination by pesticides and response of benthic communities (bacteria and free-living marine nematode) were investigated. The analysis of 22 active organochlorine pesticides in sediments was performed according to quick, easy, cheap, effective, rugged, and safe (QuEChERS) method, biodiversity of indigenous bacterial community sediment was determined by terminal restriction fragment length polymorphism (T-RFLP), and free-living marine nematodes were counted. The results of the field survey showed that iodosulfuron, mesosulfuron, 2,4-dichlorophenoxyacetic acid (2,4 D), glyphosate, and fenoxaprops were the most used herbicides, tebuconazole and epoxiconazole the most used fungicides, and deltamethrin the most used insecticide. Sixteen organochlorine pesticide compounds among the 22 examined were detected in sediments up to 2 ppm in Ichkeul Lake, endrin, dieldrin, and hexachlorocyclohexane being the most detected molecules. The most pesticide-contaminated site in the lake presented the higher density of nematode, but when considering all sites, no clear correlation with organochlorine pesticide (OCP) content could be established. The bacterial community structure in the most contaminated site in the lake was characterized by the terminal restriction fragments (T-RFs) 97, 146, 258, 285, and 335 while the most contaminated site in the lagoon was characterized by the T-RFs 54, 263, 315, 403, and 428. Interestingly, T-RFs 38 and 143 were found in the most contaminated sites of both lake and lagoon ecosystems, indicating that they were resistant to OCPs and able to cope with environmental fluctuation of salinity. In contrast, the T-RFs 63, 100, 118, and 381 in the lake and the T-RFs 40, 60, 80, 158, 300, 321, and 357 in the lagoon were sensitive to OCPs. This study highlighted that the intensive use of pesticides in agriculture, through transfer to aquatic ecosystem, may disturb the benthic ecosystem functioning of the protected area. The free-living marine nematodes and bacterial communities represent useful proxy to follow the ecosystem health and its capacity of resilience.

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Polychlorinated biphenyls (PCBs) and organochlorine pesticides (OCPs) in harbor sediments from Sea Lots, Port-of-Spain, Trinidad and Tobago

Cited by 55 publications

References 45 publications

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

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

Distribution and ecological risk assessment of HCHs and DDTs in surface seawater and sediment of the mariculture area of Jincheng Bay, China

Pesticides in Ichkeul Lake–Bizerta Lagoon Watershed in Tunisia: use, occurrence, and effects on bacteria and free-living marine nematodes

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