Abstract
The adsorption of zinc, copper and cadmium ions onto pure goethite particles in buffered aquatic systems was studied as a function of particle concentration (C(p)). The dependence of the adsorption isotherms on the particle concentration is most obvious in the Zn-goethite system, less obvious in the Cu-goethite system, and undetectable in the Cd-goethite system. This result is in agreement with the observation that an increase in C(p) causes the biggest decrease in adsorption reversibility in the Zn-goethite system, a smaller decrease in reversibility in the Cu-goethite system and almost no changes in adsorption hysteresis in the Cd-goethite system. The results of experiments, designed to eliminate several typical sources of experimental artefact, agree with the prediction of the metastable-equilibrium adsorption theory (G. Pan, P.S. Liss, J. Colloid Interface Sci. 201 (1998) 71). Copyright (C) 1999 Elsevier Science B.V.
| Original language | English |
|---|---|
| Pages (from-to) | 127-133 |
| Number of pages | 7 |
| Journal | Colloids and Surfaces A: Physicochemical and Engineering Aspects |
| Volume | 151 |
| Issue number | 1-2 |
| DOIs | |
| State | Published - 15 Jun 1999 |
| Externally published | Yes |
| Event | Proceedings of the 1997 International Conference on Interfaces against Pollution - Wageningen, Neth Duration: 10 Aug 1997 → 13 Aug 1997 |
Keywords
- Estuarine
- Metal ions
- Natural waters
- Sea
- Sorption-desorption
ASJC Scopus subject areas
- Surfaces and Interfaces
- Physical and Theoretical Chemistry
- Colloid and Surface Chemistry