Quantification of natural vapor fluxes of trichloroethene in the unsaturated zone at Picatinny Arsenal, New Jersey

Article Abstract:

A comparison of vertical gas-phase diffusion fluxes of trichloroethylene (TCE) vapor in the unsaturated zone at Picatinny Arsenal in New Jersey indicates that mechanisms other than steady-state vapor diffusion may be contributing to the transport of TCE vapors. This is because in many cases, the upward of TCE vapor flux was several orders of magnitude higher than the upward TCE diffusion flux. The fluxes were indirectly estimated through the measurement of the TCE vapor concentration gradient in the unsaturated zone and the application of Fick's law to calculate the flux.

All Other Basic Organic Chemical Manufacturing, Industrial organic chemicals, not elsewhere classified, Trichloroethylene, Analysis, Chemical vapor deposition

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Permeability of earthen liners containing organobentonite to water and two organic liquids

Article Abstract:

The permeability of a compacted earthen liner consisting of sand and bentonite, and sand, bentonite and an organobentonite was investigated by permeability tests, X-ray diffraction and contact-angle measurements. Permeabilities of sand/bentonite specimens increased by a factor of 100 when the permanent liquid was heptane. In contrast, sand/bentonite/organobentonite specimens showed no changes in permeability when heptane was the permanent liquid. Nitrobenzene showed low permeabilities for all specimens.

Usage, Sanitary landfills

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Sorption of nonionic organic contaminants to single and dual organic cation bentonites from water

Article Abstract:

The sorption of three different nonionic organic contaminants to a variety of dual-cation organobentonites from water was investigated to determine how the molecular structure and amount of cations affect the magnitude of nonionic solute sorption. The results showed that the adsorption and partition components do not function independently. Long-chain alkyl functional groups had an adverse effect on solute adsorption but they also enhanced solute uptake.

Clay and related minerals, not elsewhere classified, Bentonite, Clay and Ceramic and Refractory Minerals Mining, Absorption

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