Transport of Gas-Phase Polycyclic Aromatic Hydrocarbons to the Venice Lagoon
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- 作者：Andrea Gambaro ; Laura Manodori ; Ivo Moret ; Gabriele Capodaglio ; and Paolo Cescon
- 刊名：Environmental Science & Technology
- 出版年：2004
- 出版时间：October 15, 2004
- 年：2004
- 卷：38
- 期：20
- 页码：5357 - 5364
- 全文大小：179K
- 年卷期：v.38,no.20(October 15, 2004)
- ISSN：1520-5851
文摘
Concentrations of gas-phase polycyclic aromatic hydrocarbons (PAHs) were studied over one year at two sites ofthe Venice lagoon (designated Marine and Industrial)and at a mainland station (designated Rural) in Italy. Average
PAH concentrations, calculated as sum of 16 PAHs, atMarine are about three and five times lower than those atIndustrial and Rural, respectively. The seasonal trends,the temperature-PAH relationship, and principal componentanalysis indicate that at Industrial and Marine sitesseveral 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 couldalternate between vehicle emissions and residentialheating. At Rural the main PAH sources are: vehicleemissions in the spring and autumn; vehicle emissions,field burning, and wood combustion in the summer; andvehicle emissions and fuel consumption for residential heatingin the winter. To evaluate the contribution from differentsources to the Venice Lagoon air, horizontal fluxes of PAHshave been obtained. The estimated annual flux of PAHsis about 9 times greater at Industrial (193.5 mg m-2 y-1) thanat Marine (20.6 mg m-2 y-1). These results show thatstudy of the chemical contamination of the Venice atmospheremust take into account the PAH flux derived from marinesources as well as the continental input.
PAH concentrations, calculated as sum of 16 PAHs, atMarine are about three and five times lower than those atIndustrial and Rural, respectively. The seasonal trends,the temperature-PAH relationship, and principal componentanalysis indicate that at Industrial and Marine sitesseveral 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 couldalternate between vehicle emissions and residentialheating. At Rural the main PAH sources are: vehicleemissions in the spring and autumn; vehicle emissions,field burning, and wood combustion in the summer; andvehicle emissions and fuel consumption for residential heatingin the winter. To evaluate the contribution from differentsources to the Venice Lagoon air, horizontal fluxes of PAHshave been obtained. The estimated annual flux of PAHsis about 9 times greater at Industrial (193.5 mg m-2 y-1) thanat Marine (20.6 mg m-2 y-1). These results show thatstudy of the chemical contamination of the Venice atmospheremust take into account the PAH flux derived from marinesources as well as the continental input.