Seasonality of air-water fluxes of hexachlorocyclohexanes in Lake Ontario

Article Abstract:

Hexachlorocyclohexane (HCH) air-water gas transfer for Lake Ontario was measured for the period May-Oct. 1993. Air-water fluxes were computed while the semi-annual loadings of alpha- and gamma-HCH were estimated. Air concentrations ranged from 51-200 pg m(super -3) for alpha-HCH and from 8-133 pg m(super -3) for gamma-HCH. HCH air-water gas exchange was found to be a seasonally dynamic process with reverses between volatilizational and depositional situations for the isomers.

Lake Ontario, Cyclohexane

---

Reversal of the air-water gas exchange direction of hexachlorocyclohexanes in the Bering and Chukchi seas: 1993 vs 1988

Article Abstract:

The air-water gas exchange of hexachlorocyclohexanes (HCHs) in the Bearing and Chuckchi seas between 1988 and 1993 was studied to determine the magnitude and direction of the gas flux. Water and air samples were collected and subjected to volumetric analysis using a gas chromatograph. Results show that the average concentration of HCHs in the ocean surface water dropped by about 20% since 1988 while air concentrations dropped by a factor of three.

Polychlorinated biphenyls, Atmospheric circulation, Lindane, Bering Sea, Chukchi Sea

---

Seasonality in exchange of organochlorines between Arctic air and seawater

Article Abstract:

An investigation of the air-to-sea exchanges of organochlorine (OC) pesticides in the Arctic environment determined that advection of polar mixed layer water had a strong influence on the OC concentrations in seawater. Loss of OC due to particle sedimentation was found not to be an important factor in determining OC concentrations at the surface layer.

Water pollution, Organochlorine compounds, Organic chlorine compounds

Similar abstracts:

• Abstracts: Quantification of natural vapor fluxes of trichloroethene in the unsaturated zone at Picatinny Arsenal, New Jersey
• Abstracts: Automated evaluation of material parameters of viscoplastic constitutive equations. Multiaxial constitutive behavior of ferroelectrics materials
• Abstracts: Effects of pore water velocity on the transport of arsenate. Alternative model for cationic surfactant adsorption by layer silicates
• Abstracts: Determination of PCBs in fish tissues using supercritical fluid extraction. Time response of the Lake Ontario ecosystem to virtual elimination of PCBs

This website is not affiliated with document authors or copyright owners. This page is provided for informational purposes only. Unintentional errors are possible.