Particle/gas concentrations and distributions of PAHs in the atmosphere of southern Chesapeake Bay

Article Abstract:

Contamination via the air is a major source of pollutants in several aquatic ecosystems. The research, aiming at quantifying and assessing the spatial and temporal variation in PAH gaseous exchange fluxes across southern Chesapeake Bay's air-water interface, examined the atmospheric PAH concentrations in Haven Beach, York River, Hampton Beach and Elizabeth River. Results show that PAH levels at the four sites were the same, undergoing increases during the winter probably because of the temperature dependence of particle-gas partitioning.

Waste Management and Remediation Services, Hydrocarbon Pollutants NEC, Pollution, Hydrocarbon pollutants

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Gaseous exchange of polycyclic aromatic hydrocarbons across the air-water interface of southern Chesapeake Bay

Article Abstract:

Gas exchange is an important factor in determining polycyclic aromatic hydrocarbon (PAH) exposure and concentration levels in southern Chesapeake Bay. Factors that strongly affect PAH gas transfer include the PAH gas-phase concentration and the temperature of the water. The direction and magnitude of gas exchange fluxes were found not to be coherent, but they were instead found to vary in magnitude and direction.

R&D NEC, Polycyclic aromatic hydrocarbons, Gas flow

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Iron(III) catalyzed photochemical reduction of chromium(VI) by oxalate and citrate in aqueous solutions

Article Abstract:

Chromium(VI) is a highly toxic human carcinogen and mutagen that is very mobile in aqueous systems. Fe(II), which is produced photochemically from organics and Fe(III) phases, offers a potential way to reduce chromium(VI) to its nontoxic chromium(III) state. The research investigated the product yield, the stoichiometry, and the rates of the reductive process occurring between chromium and iron.

Environmental aspects, Chromium, Chromium (Metal)

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