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ATMOSPHERIC DRY PARTICLE DEPOSITION OF POPS AND TRACE METALS IN AN URBAN- AND INDUSTRIALLY-IMPACTED MID-ATLANTIC ESTUARY (AEOLOS B MID-ATLANTIC)
Description:
Emissions of hazardous air pollutants into the coastal urban-industrial
atmosphere increase atmospheric depositional fluxes to proximate water bodies.
Dry deposition of large particles containing persistent organic pollutants
(POPs) and trace metals were a major contributor to deposition within 30-60 km
of Chicago and all of Lake Michigan. The lower Hudson River Estuary (HRE) is
likely even more heavily impacted by its proximity to the urban-industrial
activities of NY and NJ. Estimates of wet and dry deposition of selected POPs as
part of a new atmospheric research and monitoring network (NJADN) are not
sufficient to support receptor accumulations rates.
Hypothesis:
Dry deposition of large particles containing POPs and trace metals dominate
atmospheric deposition to estuaries proximate to urban/industrial centers.
Objectives:
(1) To determine the dry depositional flux of coarse and fine particles,
selected POPs and trace metals to the lower HRE using surrogate depositional
surfaces (renewing water surface sampler and aerodynamic frisbee surface
deployed on a modified MIC wet-only sampler); (2) to determine the seasonal
particle size distribution of mass, selected POPs and trace metals in the lower
HRE; (3) to model the dry particle depositional fluxes of particle mass and
targets species to the HRE based on the particle size distribution; (4) to
provide a field comparison of the surrogate surface and models to estimate dry
particle depositional fluxes; and (5) to provide an assessment of the dry
depositional component of the atmospheric deposition of selected POPs and trace
metals to the lower HRE.
Record Details:
Record Type:PROJECT(
ABSTRACT
)
Start Date:08/01/2000
Completion Date:07/31/2002
Record ID:
52456
Keywords:
MID-ATLANTIC, EPA REGION II,
Related Organizations:
Role
:OWNER
Organization Name
:RUTGERS SUNJ
Mailing Address
:610 Taylor Road
Citation
:Piscataway
State
:NJ
Zip Code
:8854
Project Information:
Approach
:Objective (1) will be accomplished by deploying a novel dry deposition collector based on a renewing water surface and a flat dry surface positioned in the dry cycle of a modified MIC precipitation collector. The latter dry deposition sampler will integrate dry deposition over continuous 9-day periods while the water surface collector will determine dry depositional fluxes during 3 intensive measurement campaigns at two sites in the lower HRE. Objective (2) will be accomplished by determining the particle size distributions of atmospheric particles using MOUDI and NRI collectors (impactors) during the intensive campaigns. Objective (3) will be accomplished by modeling size-dependent deposition velocities from (2) as a function of meteorology from which seasonal fluxes will be derived. Objective (4) will be accomplished by comparing depositional fluxes from surrogate surfaces to modeled fluxes from particle size distributions. Objective (5) will be accomplished by estimating the dry depositional fluxes to the lower HRE and contrasting to wet deposition and gas exchange fluxes of target compounds assessed separately. The organic chemical measurements will be made in four seasons at an urban/industrial and coastal marine site. Target chemicals are PCBs (total PCBs, emphasize ~20 dominant congeners), PAHs (~24 dominant compounds) and trace metals (Mg, Al,, Cr, Cu, Zn, As, Cd and Pb).
Cost
:$230,000.00
Research Component
:Engineering and Environmental Chemistry
Project IDs:
ID Code
:R828177
Project type
:EPA Grant