Occurrence of polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs), polychlorinated biphenyls (PCBs) and polybrominated diphenyl ethers (PBDEs) in Lake Maggiore (Italy and Switzerland)

Abstract : Samples of air (gas and particulate phases), bulk deposition, aquatic settling material and sediments were collected in Lake Maggiore (LM) in order to determine their content of polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs), polychlorinated biphenyls (PCBs) and polybrominated diphenyl ethers (PBDEs). Air (gas and particulate phases) concentrations were 0.5 pg m-3, 80 pg m-3, 13 pg m3 and 106 pg m-3 for SPCDD/Fs, SPCBs, S dioxin-like PCBs (DL-PCBs) and SPBDEs, respectively. Deposition fluxes ranged from 0.7 ng m-2 d-1 for SPCDD/Fs to 32 ng m-2 d-1 for SPCBs. Aquatic settling material presented concentrations of 0.4 ng g-1 dry weight (dw) for SPCDD/Fs, 13 ng g-1 dw for SPCB, 3.4 ng g-1 dw for SDL-PCBs and 5.7 ng g-1 dw for SPBDEs. Mean sediment concentrations were 0.4 ng g-1 dw for SPCDD/Fs, 11 ng g-1 dw for SPCB, 3 ng g-1 dw for SDL-PCBs and 5.1 ng g-1 dw for SPBDEs. Similar PCDD/F and DL-PCB congener patterns in all the environmental compartments of LM point to an important, if not dominant, contribution of atmospheric deposition as source of these pollutants into LM. In contrast, PBDE congener distribution was not similar in the different environmental compartments. BDE 47 dominated air and settling material, while BDE 209 was the predominant congener in the bulk atmospheric deposition. Moreover, sediments showed two distinct PBDE congener profiles. Lower PBDE concentrated sediments were dominated by congeners 47 and 99, while BDE 209 dominated in higher PBDE concentrated samples. This suggests the influence of local sources as well as atmospheric input of PBDEs into LM.
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https://hal.archives-ouvertes.fr/hal-02311567
Contributor : Javier Castro Jiménez <>
Submitted on : Friday, October 11, 2019 - 9:24:17 AM
Last modification on : Saturday, October 12, 2019 - 1:15:39 AM

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Ingrid Vives, Elisabetta Canuti, Javier Castro-Jiménez, Eugen Christoph, Steven Eisenreich, et al.. Occurrence of polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs), polychlorinated biphenyls (PCBs) and polybrominated diphenyl ethers (PBDEs) in Lake Maggiore (Italy and Switzerland). Journal of Environmental Monitoring, Royal Society of Chemistry, 2007, 9 (6), pp.589-598. ⟨10.1039/b700919d⟩. ⟨hal-02311567⟩

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