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Abstract

The adsorption of cobalt and mercury ions onto colloidal gamma-alumina was studied in the presence of various concentrations of natural humic acid and at different ionic strengths. The surface complexation constant and the stoichiometry of the Co(2+)-Al(2)O(3) complex were derived. The adsorption of the two metals was found to increase with increasing humic acid concentration under acidic and nearly neutral conditions, whereas an opposite effect was observed at higher pH. Abrupt changes in the adsorptive behaviour of mercury were induced even by very small humic acid concentrations.

Additional information

Authors: AZIMONTI G, Università di Milano, Dipartimento di Chimica Fisica ed Elettrochimica (IT);RIGHETTO L, Università di Milano, Dipartimento di Chimica Fisica ed Elettrochimica (IT);BELLOBONO I R, Università di Milano, Dipartimento di Chimica Fisica ed Elettrochimica (IT);BIDOGLIO G, JRC Ispra (IT)
Bibliographic Reference: Paper presented: 6th International Meeting of the International Humic Substances Society, Monopoli (IT), September 20-25, 1992
Availability: Available from (1) as Paper EN 37491 ORA
Record Number: 199310715 / Last updated on: 1994-11-29
Category: PUBLICATION
Original language: en
Available languages: en