Determination of diffusion coefficients of humic substances by fluorescence correlation spectroscopy: role of solution conditions

Article Abstract:

Researchers from the University of Geneva and the Swiss Federal Institute for Environmental Science and Technology studied the diffusion coefficients determination of humic and fulvic acids in the Suwannee River by using fluorescence correlation spectroscopy.

Switzerland, Analytical Laboratory Instrument Manufacturing, Analytical instruments, Spectrographs & Spectrophotometers, Instrument industry, Instrument industry (Equipment), Swiss Federal Institute for Environmental Science and Technology, Optical instruments, University of Geneva

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Diffusion coefficients and polydispersities of the Suwannee River fulvic acid: comparison of fluorescence correlation spectroscopy, pulsed-field gradient nuclear magnetic resonance, and flow field-flow fractionation

Article Abstract:

Researchers examined and compared the diffusion coefficients and polydispersities of Suwannee River fulvic acid by using fluorescence correlation spectroscopy, pulse-field gradient nuclear magnetic resonance spectroscopy and flow field-flow fractionation.

United States, Usage, Chemical industry, Spectrum analysis, Spectroscopy, Fractionation, Fractional distillation

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A generalized description of aquatic colloidal interactions: the three-colloidal component approach

Article Abstract:

Colloidal interactions in aqueous solutions are found to vary and that the concentration of stable colloids are dependent on the relative proportions of fulvic compounds, compact inorganic colloids and rigid biopolymers. Fulvic compounds are found to stabilize organic colloids while rigid biopolymers are found to have a destabilizing effect with the formation of aggregates dependent on the amount of each in an aquatic system.

Research and Development in the Physical, Engineering, and Life Sciences, Ecological Sciences, Environmental aspects, Study and teaching, Environmental sciences, Water chemistry, Colloids

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