Surfactant-enhanced dissolution of phenanthrene into water for laminar flow conditions

Article Abstract:

Surfactants have been shown to enhance the removal of nonaqueous phase liquids (NAPLs) during subsurface remediation by increasing their solubility in the displacing fluid. In a study investigating the dissolution of solid phenanthrene into solutions containing nonionic surfactants, steady-state phenanthrene effluent concentrations declined. In the absence of surfactant, measured values of effluent concentrations were consistent with experimental values, and increased with increasing surfactant concentrations. A mechanistic model describing the influence of surfactants on phenanthrene dissolution is presented.

Methods, Models, Environmental aspects, Bioremediation, Surface active agents, Solubility, Nonaqueous solvents

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Salicylate stimulates the degradation of high-molecular weight polycyclic aromatic hydrocarbons by pseudomonas saccharophila P15

Article Abstract:

Researchers investigated the use of the bacteria Pseudomons saccharophila P15 (PS15) as a possible decontaminate of polycyclic aromatic hydrocarbons in soil. PAHs are known for high levels of toxicity, mutagenicity, and carcinogenicity. PS15 was subjected to various chemicals in the lab to study which would produce optimum growth media and thereby transform PAHs to a more benign chemical. The addition of a salicylate to PS15 prior to introduction to PAHs, produced varying, but overall positive results.

United States, Usage, Bacteria, Soil pollution, Hydrocarbon research

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Decomposition of tetrachloro-1,4-benzoquinone (p-chloranil) in aqueous solution

Article Abstract:

p-Chloranil hydrolyzes at near-neutral to slightly acidic pH to produce trichlorohydroxyquinone and chloranilic acid, two compounds that have known genotoxic effects associated with pentachlorophenol. Electrospray mass spectrometry is used to describe the products of the two-step hydrolysis of chloranil. The kinetics of each step are also described.

Pentachlorophenol, Decomposition (Chemistry)

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