Assessment of PCDD/Fs and PCBs in Sediments from the Spanish Northern Atlantic Coast

作者：Gomez Lavin Sonia^*; Gorri Daniel; Irabien Angel

来源：Water, Air, and Soil Pollution, 2011, 221(1-4): 287-299.

DOI：10.1007/s11270-011-0790-0

• PCDD/Fs
• Dioxin-like PCBs
• Marker PCBs
• Marine sediments
• Cantabrian Coast
• Background

Surface coastal sediments (0-10 cm) collected from three natural environments on the Spanish Northern Atlantic Coast were analyzed so as to determine concentrations of 6 marker polychlorinated biphenyls (PCBs), 12 dioxin-like PCBs (dl-PCBs) and 17 polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans (PCDD/Fs). An analytical procedure based on Soxhlet extraction followed by an automated cleanup and final high-resolution gas chromatography coupled to high-resolution mass spectrometry was applied for the determination of the persistent organic pollutants. Marker PCB levels ranged from 385.5 to 4,060.9 pg/g dry weight (d.w.) showing a similar congener pattern in all sediments dominated by the less volatile congeners PCB 153 and PCB 138. Linear correlations were found between marker and dl-PCBs. Toxicity equivalent values were calculated for PCDD/Fs and dl-PCBs reaching its maximum at 0.52 pg WHO1998-TEQ/g d.w., with an average dl-PCBs contribution on the toxicity of the samples of 75%, and showing to be in good agreement with background levels in the North-East Atlantic Ocean Coasts of nearly 1 pg/g WHO1998-TEQ d.w. Dimensionless environmental quality criteria were much lower than 1 indicating the low probability to induce ecotoxicological impacts.

• 出版日期2011-10