117,325 research outputs found
PCBs and PAHs in sea-surface microlayer and sub-surfacewater samples of the Venice Lagoon (Italy)
No full textPolychlorinated biphenyls (PCBs) and polycyclic aromatic hydrocarbons (PAHs) are two classes of micropollutants intensively monitored\ud
and regulated due to their toxicity, persistency and wide diffusion. Their concentrations have been investigated in sea-microlayer\ud
(SML) and sub-surface water (SSW) samples collected at two sites of the Venice Lagoon, a fragile ecosystem highly influenced by industrial\ud
and anthropogenic emissions. The total PPCB concentration varies from 0.45 ng/l to 2.1 ng/l in SSW while a clear enrichment is\ud
observed in the SML, where it ranges from 1.2 ng/l to 10.5 ng/l. The total PPAH concentration shows marked differences between the\ud
two stations and varies from 12.4 ng/l to 266.8 ng/l in SSW; in SML it is more uniform and ranges from 19.6 ng/l to 178.9 ng/l. The\ud
enrichment factors are not larger than 1 for both pollutants in the dissolved phase, while they are most significant for the particulate\ud
phase (PPCB: 5–9; PPAH: 4–14).\ud
2005 Elsevier Ltd. All rights reserved
Temporal evolution of gas-phase polychlorinated biphenyls in the Venice lagoon atmosphere
No full textPolychlorobiphenyls in Atmospheric Aerosol and in Sea-Surface Microlayer in the Venice Lagoon
No full textTransport of Gas-Phase Polycyclic Aromatic Hydrocarbons to the Venice Lagoon
No full textConcentrations of gas-phase polycyclic aromatic hydrocarbons
(PAHs) were studied over one year at two sites of
the Venice lagoon (designated Marine and Industrial)
and at a mainland station (designated Rural) in Italy. Average
åPAH concentrations, calculated as sum of 16 PAHs, at
Marine are about three and five times lower than those at
Industrial and Rural, respectively. The seasonal trends,
the temperature-PAH relationship, and principal component
analysis indicate that at Industrial and Marine sites
several local sources (vehicle and industrial emissions,
etc.) could be the PAH sources in the warmer months,
whereas in the colder months the main PAH sources could
alternate between vehicle emissions and residential
heating. At Rural the main PAH sources are: vehicle
emissions in the spring and autumn; vehicle emissions,
field burning, and wood combustion in the summer; and
vehicle emissions and fuel consumption for residential heating
in the winter. To evaluate the contribution from different
sources to the Venice Lagoon air, horizontal fluxes of PAHs
have been obtained. The estimated annual flux of PAHs
is about 9 times greater at Industrial (193.5 mg m-2 y-1) than
at Marine (20.6 mg m-2 y-1). These results show that
study of the chemical contamination of the Venice atmosphere
must take into account the PAH flux derived from marine
sources as well as the continental input
Distribution of particulate- and vapour-phase polychlorobiphenyls and polycyclic aromatic hydrocarbons in the atmosphere of the Venice Lagoon
No full text
Fluorophore-doped luminescent silica nanoparticles as efficient labels in DNA microarrays
No full textDetermination of Polychlorobiphenyls and polycyclic aromatic hydrocarbons in the atmospheric aerosol of the Venice Lagoon
No full text- …
