title: Seasonal air-water exchange fluxes of polychlorinated biphenyls in the Hudson River Estuary.
abstract: Polychlorinated biphenyls (PCBs) were measured in the air and water over the Hudson River Estuary during six intensive field campaigns from December 1999 to April 2001. Over-water gas-phase SigmaPCB concentrations averaged 1100 pg/m3 and varied with temperature. Dissolved-phase SigmaPCB concentrations averaged 1100 pg/L and displayed no seasonal trend. Uncertainty analysis of the results suggests that PCBs with 5 or fewer chlorines exhibited net volatilization. The direction of net air/water exchange could not be determined for PCBs with 6 or more chlorines. Instantaneous net fluxes of SigmaPCBs ranged from +0.2 to +630 ng m(-2) d(-1). Annual fluxes of SigmaPCBs were predicted from modeled gas-phase concentrations, measured dissolved-phase concentrations, daily surface water temperatures and wind speeds. The net volatilization flux was +62 microg m(-2) yr(-1), corresponding to an annual loss of +28 kg/yr of SigmaPCBs from the Hudson River Estuary for the year of 2000.
authors.affiliation: Department of Environmental Sciences, Rutgers University, 14 College Farm Road, New Brunswick, NJ 08901, USA.
authors.forename: Shu
authors.initials: S
authors.lastname: Yan
authors.forename: Lisa A
authors.initials: LA
authors.lastname: Rodenburg
authors.forename: Jordi
authors.initials: J
authors.lastname: Dachs
authors.forename: Steven J
authors.initials: SJ
authors.lastname: Eisenreich
mesh_terms: D000042:Absorption; D000393:Air Pollutants / Q000032:analysis; D004784:Environmental Monitoring / Q000379:methods; D004785:Environmental Pollutants / Q000032:analysis*; D009515:New Jersey; D011078:Polychlorinated Biphenyls / Q000032:analysis*; D045483:Rivers; D012621:Seasons; D014835:Volatilization; D014874:Water Pollutants, Chemical / Q000032:analysis
chemical_list: D000393:Air Pollutants; D004785:Environmental Pollutants; D014874:Water Pollutants, Chemical; D011078:Polychlorinated Biphenyls