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The objective of the work reported here has been to study the behaviour of a chosen commerical humic acid from Aldrich Chemie. All humic acids isolated from nature deviate more or less in composition, but demonstrate a similar though not identical physico-chemical behavior. By a more thorough investigation it is hoped to reveal some reaction patterns, which are characteristic for humic acids as a group. The experimental work has demonstrated that humic acids take part in ion-exchange reactions with cations including the proton. Also, during different purification steps the resulting materials deviated not only from the original sample, but within samples. Some samples behaved like a polydisperse mixture of components, and other samples showed a monodisperse behavior. Simple tirations of a seemingly monodisperse sample with NaOH demonstrated, not only that sodium is more or less bound ot the solube material, but also that the material or some intermediates take part in polymerization, or depolymerization, reactions, which could be described as micelle formations.

Additional information

Authors: SKYTTE JENSEN B, Risø National Laboratory, Roskilde (DK);HALKEN T, Risø National Laboratory, Roskilde (DK);JESTIN I, Risø National Laboratory, Roskilde (DK);JØRGENSEN D, Risø National Laboratory, Roskilde (DK);J?RGENSEN D, Ris? National Laboratory, Roskilde (DK)
Bibliographic Reference: EUR 16763 EN (1996) 77pp., FS, ECU 10.00
Availability: Available from the (2)
ISBN: ISBN 92-827-6188-6
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