Article Abstract:
Bioavailability restrictions in contaminated soils can be elucidated by changes in mineral oil compositions, since the bioavailability of oil components in such soils is an important regulating factor for rates of biodegradation. A lysimeter experiment and laboratory incubations were conducted to examine the fate of these oil components. A shift in the n-alkane ratios suggests that two different mechanisms control the bioavailability of the oil. Solubilization from a non-aqueous-phase liquid into the aqueous phase controls bioavailability at higher concentrations. Biodegradation rates of n-alkanes increased with decreasing carbon number below 4.0 g. kg.(super -1).
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Article Abstract:
The alteration of the aminonapthalene transport in groundwater systems containing clay by ion-exchange reaction followed by a site-limited irreversible transformation reaction is discussed. The sorbate and sorbent properties of aminonapthalene were subjected to batch and column studies and methanol elution. It was found that the sequence of slow ion-exchange reaction followed by a slower transformation reaction complicates the transport of aminonapthalene through montmorillonite-containing porous media.
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Article Abstract:
H. De Jonge and M.C. Mittelmeijer-Hazeleger's assumptions on the composition of the surface area of soil organic matter (SOM) were erroneous. The surface area of SOMs are composed of small organic molecules of benzene, polycyclic aromatic hydrocarbons and hexachlorobiphenyls. De Jonge and Mittelmeijer-Hazeleger's assumptions on the CO2-derived surface areas and pore dimensions of the SOMs are also erroneous because their models are not sufficient to explain the results other sorption investigations.
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