PCDD/Fs and dioxin-like PCBs in sediment and biota from the Mondego estuary (Portugal)

Nunes, Manuela Barreto; Marchand, Philippe; Vernisseau, Anaïs; Bizec, Bruno Le; Ramos, Fernando; Pardal, Miguel Ângelo

doi:10.1016/j.chemosphere.2011.02.081

Cited by 64 publications

(26 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The levels were in the same range with data from the Napoleon Gulf and Thurston Bay of Lake Victoria (Ssebugere et al, 2013b) and other fresh water bodies in Africa like the Nile River in Egypt (El-Kady et al, 2007), Vaal River in South Africa (Nieuwoudt et al, 2009) and Lake Awassa in Ethiopia (Urbaniak and Zalewski, 2011) (Table 2). The levels were low to moderate compared to the data reported in sediments from industrialized areas in the United States of America (Kannan et al, 2008;Loganathan et al, 2008;Shen et al, 2009;Yunuén et al, 2011) and Europe (Nunes et al, 2011;Vives et al, 2007). The results were lower than those reported in sediments from Asia: Can Gio in Vietnam and Japan (Kishida et al, 2010); Xiangjiang River in China (Chen et al, 2012) and Lake Shihwa in Korea (Moon et al, 2012).…”

Section: Concentrations Of Pcdd/fs In the Sedimentscontrasting

confidence: 58%

Polychlorinated dibenzo-p-dioxins, polychlorinated dibenzofurans and polybrominated diphenyl ethers in sediments and fish species from the Murchison Bay of Lake Victoria, Uganda

Ssebugere

Sillanpää

Wang

et al. 2014

Science of The Total Environment

View full text Add to dashboard Cite

• High concentrations of PCDD/Fs and PBDEs were found at wastewater discharge points.• PCDD/F and PBDE concentrations were low to moderate compared to data in literature.• The concentration difference between fish species was attributed to feeding habits.• The fish were fit for human consumption with regard to PCDD/Fs and PBDEs. a b s t r a c t a r t i c l e i n f o Polychlorinated dibenzo-p-dioxins/furans (PCDD/Fs) and polybrominated diphenyl ethers (PBDEs) were analyzed in sediments and fish from the Murchison Bay of Lake Victoria by high resolution gas chromatography/ high resolution mass spectrometry (HRGC/HRMS). Average concentrations of total (Σ) PCDD/Fs and ΣPBDEs in sediments ranged from 68.8 to 479 pg g −1 dry weight (dw) and 60.8 to 179 pg g −1 dw, respectively. Contamination levels of sedimentary PCDD/Fs and PBDEs were low to moderate compared to other urbanized regions worldwide. The concentrations in different fish species (Nile perch; Lates niloticus and Nile tilapia; Oreochromis niloticus) were 5.32 to 49.0 pg g −1 wet weight (ww) for PCDD/Fs and 59.3 to 495 pg g −1 ww for PBDEs. Higher concentrations of the pollutants were found in L. niloticus than O. niloticus, which could be attributed to species differences in feeding habits and lifestyles. World Health Organization-toxic equivalents (WHO 2005 -TEQs) for PCDD/Fs ranged from 0.08 to 0.33 pg TEQ g −1 dw and 0.001-0.14 pg TEQ g −1 ww in sediments and fish, respectively. The TEQ values were low compared to the data for fresh water fish reported in literature and within a permissible level of 3.5 pg g −1 ww recommended by the European Commission. Based on the Commission set value and minimum risk level criteria formulated by the Agency for Toxic Substances and Disease Registry, the fish from the Murchison Bay was fit for human consumption.

show abstract

Section: Concentrations Of Pcdd/fs In the Sedimentscontrasting

confidence: 58%

Polychlorinated dibenzo-p-dioxins, polychlorinated dibenzofurans and polybrominated diphenyl ethers in sediments and fish species from the Murchison Bay of Lake Victoria, Uganda

Ssebugere

Sillanpää

Wang

et al. 2014

Science of The Total Environment

View full text Add to dashboard Cite

show abstract

“…All other PCB congeners were present in negligible concentrations (Figure 3). This congener pattern is quite common in eels from European waters and has also been reported, e. g. from Belgium [5] and Portugal [48].…”

Section: Pcb Congener Patternsmentioning

confidence: 91%

Contaminant levels in the European eel (Anguilla anguilla) in North Rhine-Westphalian rivers

2014

View full text Add to dashboard Cite

Background: Populations of the European eel (Anguilla anguilla) are declining rapidly and are now considered below safe biological limits. High pollution levels are one of the possible reasons for this decline. Contaminant levels are also of concern with regard to human consumption. This study examined the contamination levels of eels from the North Rhine-Westphalian catchment area of the Rhine and from adjacent rivers. A total of 119 eels from 13 sampling sites were analysed for polychlorinated dibenzo-p-dioxins and furans (PCDD/PCDFs), polychlorinated biphenyls (PCBs), polybrominated diphenyl ethers (PBDEs), mercury, perfluorooctane sulfonate (PFOS) and hexachlorobenzene (HCB). Results: North Rhine-Westphalian eels had very high levels of contaminants comparable to eels from other European water bodies which are strongly influenced by anthropogenic activities. Mean values for PCDD/PCDFs ranged between 0.5 and 5.4 pg WHO 2005 toxicity equivalents (TEQ)/g, for PCDD/PCDF + dl-PCBs between 6.3 and 44.7 pg WHO 2005 TEQ/g, for indicator PCBs between 165 and 1,630 ng/g wet weight (ww), for 6 PBDEs between 9.2 and 242 μg/kg ww, for mercury between 0.069 and 0.314 mg/kg ww, for PFOS between 8.3 and 49 μg/kg ww and for HCB between 3.4 and 50 μg/kg ww. For certain sampling sites, high contamination contents of the eels could be attributed to local sources. Congener patterns for PCBs and PBDEs were described, and biota to suspended matter ratios were calculated. Conclusions: Pollution levels in eels from North Rhine-Westphalia are declining with regard to some contaminants but are still very high. Due to the high contaminant contents, eels from the rivers investigated are not suitable for human consumption. Furthermore, the concentrations of endocrine disrupting contaminants such as PCBs, PCDD/PCDFs and PBDEs in the eels are in a range which might have deleterious effects on the eel populations.

show abstract

“…At the same time, point-source pollution from wastewater, waste management, industry and contaminated land has also potentially increased. As a result, pesticides, pharmaceuticals (Leston et al, 2011;Santos et al, 2010), endocrine disruptors (Baptista et al, 2013;Nunes et al, 2011;Ribeiro et al, 2009), metals (Couto et al, 2013), organic material, salt, ammonia and other urban contaminants might have increased in the system, though treatment plants can be successful in removing some of them (EPA, 2010). Such alterations in the type and pattern of LULC driving forces could have implications not only on future management policies, but also on monitoring plans and on the selection of biological indicators.…”

Section: Lulc As Driving Forces and Dynamics Over The Yearsmentioning

confidence: 99%

Systematic processes of land use/land cover change to identify relevant driving forces: Implications on water quality

Teixeira

Marques

2014

Science of The Total Environment

113

View full text Add to dashboard Cite

• LULC and LULC changes are important drivers of water condition.• We identified strong signals of systematic transitions.• Consistency and magnitude of systematic transitions reveal processes of LULC change.• Processes of LULC change reveal important drivers of water condition.• Relevant drivers reveal potential pressures linked to the process of transition. Land use and land cover (LULC) are driving forces that potentially exert pressures on water bodies, which are most commonly quantified by simply obtained aggregated data. However, this is insufficient to detect the drivers that arise from the landscape change itself. To achieve this objective one must distinguish between random and systematic transitions and identify the transitions that show strong signals of change, since these will make it possible to identify the transitions that have evolved due to population growth, industrial expansion and/or changes in land management policies. Our goal is to describe a method to characterize driving forces both from LULC and dominant LULC changes, recognizing that the presence of certain LULC classes as well as the processes of transition to other uses are both sources of stress with potential effects on the condition of water bodies. This paper first quantifies the driving forces from LULC and also from processes of LULC change for three nested regions within the Mondego river basin in 1990, 2000 and 2006. It then discusses the implications for the environmental water body condition and management policies. The fingerprint left on the landscape by some of the dominant changes found, such as urbanization and industrial expansion, is, as expected, low due to their proportion in the geographic regions under study, yet their magnitude of change and consistency reveal strong signals of change regarding the pressures acting in the system. Assessing dominant LULC changes is vital for a comprehensive study of driving forces with potential impacts on water condition.

show abstract

PCDD/Fs and dioxin-like PCBs in sediment and biota from the Mondego estuary (Portugal)

Cited by 64 publications

References 40 publications

Polychlorinated dibenzo-p-dioxins, polychlorinated dibenzofurans and polybrominated diphenyl ethers in sediments and fish species from the Murchison Bay of Lake Victoria, Uganda

Polychlorinated dibenzo-p-dioxins, polychlorinated dibenzofurans and polybrominated diphenyl ethers in sediments and fish species from the Murchison Bay of Lake Victoria, Uganda

Contaminant levels in the European eel (Anguilla anguilla) in North Rhine-Westphalian rivers

Systematic processes of land use/land cover change to identify relevant driving forces: Implications on water quality

Contact Info

Product

Resources

About