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Separation of molecular size classes of aquatic humic substances using ultrafiltration and dialysis

Shaw, Peter J., Jones, Roger I. and De Haan, Henk (1994) Separation of molecular size classes of aquatic humic substances using ultrafiltration and dialysis Environmental Technology, 15, (8), pp. 765-774.

Record type: Article


A procedure for separating aquatic humic substances into discrete molecular size fractions by the combined use of ultrafiltration and dialysis was tested. The molecular size distributions of separated fractions were examined by application of samples to a gel filtration chromatography column. Variations in the elution patterns observed for the separated fractions of small and intermediate molecular size were largely consistent with predicted effects of separation procedures. In contrast, humic substances of large molecular size were not separated effectively by dialysis using dialysis membranes of large molecular weight cut-off. Small quantities of humic material of large molecular size were observed in most of the ultrafiltrates. This phenomenon may have been an artefact of filtration and/or the result of reconfiguration of material after separation.

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Published date: August 1994
Keywords: humic substances, separation, gel filtration, ultrafiltration, dialysis


Local EPrints ID: 75747
ISSN: 0959-3330
PURE UUID: 0ec977ed-0a8a-4234-b906-03fc3dfd2044

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Date deposited: 11 Mar 2010
Last modified: 18 Jul 2017 23:42

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Author: Peter J. Shaw
Author: Roger I. Jones
Author: Henk De Haan

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