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Adsorption of wood extractives and model compounds onto bentonite
journal contribution
posted on 2023-05-18, 10:34 authored by Heier, D, Blackstock, T, Karen Stack, Richardson, D, Trevor LewisTrevor LewisThe adsorption of wood extractives and representative model compounds into two different forms of bentonite was studied. The colloidal dispersion showed limited solubility which affected the shape of the adsorption isotherm. Modelling of the adsorption isotherms showed excellent fits with Freundlich and BET isotherm models indicating that multilayer adsorption with cooperative binding was occurring. The wood extractives were found to have greater affinity with the bentonite surface than the model compounds. Bentonite B was found to be a better adsorbent than bentonite A due to the differences in exchangeable cations present and its greater swelling capacity and surface area. The addition of ethanol during the preparation of the colloidal dispersions, as done by previous researchers when studying adsorption of the oleic acid, triolein and abietic acid, appears to reduce the affinity and capacity of the adsorption onto bentonite.
Funding
Australian Research Council
Norske-Skog (Australasia) Pty Ltd
History
Publication title
Colloids and Surfaces A: Physicochemical and Engineering AspectsVolume
482Pagination
213-221ISSN
0927-7757Department/School
School of Natural SciencesPublisher
Elsevier Science BvPlace of publication
Po Box 211, Amsterdam, Netherlands, 1000 AeRights statement
Copyright 2015 Elsevier B.V.Repository Status
- Restricted