Oxidation of substituted anilines by aqueous MnO2: effect of co-solutes on initial and quasi-steady-state kinetics

Article Abstract:

Humic acid (HA) concentration, pH, MN(II), and even aromatic ring substituents appear to affect the initial and quasi-steady-state rates of oxidation of monosubstituted anilines by aqueous MnO2. Results indicate that reaction rates are increased when pH is decreased. Mn(II), Ca(II), HA, and other organic solutes prevented the oxidation of substituted anilines by blocking the reactive Mn(IV) reactive sites and inducing a reductive dissolution of Mn(II). Electron-transfer kinetics could also affect the overall rate of oxidation of substituted anilines.

All Other Basic Inorganic Chemical Manufacturing, Cyclic crudes and intermediates, Cyclic Crude and Intermediate Manufacturing, Industrial inorganic chemicals, not elsewhere classified, Manganese Compounds, Diphenylamine, Manganese, Manganese (Metal), Humic acid, Humic acids, Aromatic amines, Hydrogen-ion concentration, Biphenyls (Class of compounds), Electrolysis

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Uptake, speciation, and uncoupling activity of substituted phenols in energy transducing membranes

Article Abstract:

The behavior of substituted phenols in membranes of the purple photosynthetic bacterium, Rhodobacter sphaeroides, was investigated in a mechanistic two-parameter model. A synergistic relationship was observed between toxic effects of phenolic compounds and energy transduction in the membranes. It was found that the relationship between phenolic uncoupling activity, total concentration and speciation exert separate and independent effects on the overall uncoupling potency of these compounds.

Phenols, Phenols (Class of compounds)

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Adsorption of substituted nitrobenzenes and nitrophenols to mineral surfaces

Article Abstract:

The exhibition of homogenous surface sites of environmentally relevant surfaces were studied. Pure oxide sorbents including delta-aluminum oxide, gamma-aluminum hydroxide and amorphous silicon oxide were subjected to additional sorption experiments. Results indicate that specific and reversible interactions between nitroaromatic compounds with electron- withdrawing and electron delocalizing substituents and mineral surfaces exist.

Analysis, Evaluation, Adsorption, Surface chemistry, Nitrogen compounds

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