Kinetic studies

Article Abstract:

The reaction kinetics for the covalent binding of aromatic amines with natural organic matter were investigated by measuring the reaction kinetics and by conducting liquid-phase nitrogen-15 nuclear magnetic resonance analysis of the reaction of aniline with Suwannee River fulvic and humic acids. The reaction kinetics changed depending on the concentration of aniline. The aniline concentration rapidly decreased upon reaction with fulvic and humic acids. The rate of reaction was influenced by pH and carbonyl groups attached to fulvic acid.

Measurement, Humic acid, Fulvic acids, Humic acids, Chemical reaction, Rate of, Chemical kinetics, Aniline

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Chemical- and sediment-mediated reduction of the azo dye Disperse Blue 79

Article Abstract:

A study was conducted to analyze the effect of dyestuffs on natural water systems by investigating the effect of Dispersal Blue 79, a kind of azo dye, and 2-bromo-4,6-dinitroaniline (BDNA), a dye intermediate, on the three kinds of sediment-water systems. Dispersal Blue 79 and BDNA exhibited similar patterns of dispersion, despite the differences in their chemical contents and reduction pathways. This suggests that reduction mechanisms in chemicals offer insights into the potential effect of the chemical to the environment.

Azoic Dyes & Components, Synthetic Organic Dye and Pigment Manufacturing, Aromatic amines, Azo dyes, Dyes and dyeing, Dyeing, Dyes, Azo compounds, Dispersing agents, Dispersants

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Iron-mediated reductive transformations: investigation of reaction mechanism

Article Abstract:

The reduction of a probe molecule in the solution phase and bound to a solid support in the presence of a zero-valent iron was studied to determine if reduction by zero-valent iron is surface-mediated. The results confirmed that reduction by zero-valent iron is surface-mediated and that that direct contact of the substrate with the iron surface is necessary if electron transfer is to take place.

Water, Underground, Groundwater, Oxidation-reduction reaction, Oxidation-reduction reactions

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