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Nature of Humic Acids

✍ Scribed by BURGES, ALAN; HURST, H. M.; WALKDEN, S. B.; DEAN, F. M.; HIRST, M.

Book ID
109630305
Publisher
Nature Publishing Group
Year
1963
Tongue
English
Weight
259 KB
Volume
199
Category
Article
ISSN
0028-0836

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Fractal dimension of humic acids
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Small-angle neutron scattering experiments have been made on solutions of humic acid aggregates with an acidity corresponding to pH 5.0 and at 0.1 M ionic strength. We observe power-law decay of the intensity over one decade of the scattering vector, Q, indicating that the aggregates are fractal. We

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The ultimate analyses, u.v.-visible absorption spectra, fluorescence spectra and i.r. spectra of five humic acids have been studied. One was obtained commercially from peat, two from organic-rich soils, one from an estuary and one from a marine sediment. The U.V. spectra were used to compare average

Rheological properties of humic acids
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It has been found that humic acids in aqueous solution, as previously found with their sodium salts, behave as linear polyelectrolytes. A possible explanation in terms of intermolecular associative forces is suggested.