Conference paper

The Effect of Adsorbed Humic Substances on the Uptake of Copper(II) by Goethite

Edward Tipping ; Freshwater Biological Association, The Ferry House, Ambleside, Cumbria, England
John R. Griffith ; Freshwater Biological Association, The Ferry House, Ambleside, Cumbria, England
John Hilton ; Freshwater Biological Association, The Ferry House, Ambleside, Cumbria, England

Abstract

The uptake of Cu by particles of goethite to which humic
substances (HS) were adsorbed was measured as a function of pH
at fixed Cu concentration, and as a function of [Cu] at pH 5.5, at
an ionic strength of 0.01 mol dm-3• Uptake was enhanced, compared
to that by goethite alone, in the pH range 4-7 and at [Cuz+] ; 10-5
mol dm-3• The results at pH 5.5 show that the enhancement is not
due simply to the adsorbed HS increasing the concentration of
particulate sites able to interact with Cu, but also to the creation
of extra uptake sites of relatively high affinity when the goethite
and HS interact.

Keywords

Hrčak ID:

194185

URI

https://hrcak.srce.hr/194185

Publication date:

9.11.1983.

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