Skip to main content
Research article - Peer-reviewed, 2020

Assessing the Combined Effect of Water Temperature and Complex Water Matrices on Xanthate Adsorption Using Multiple Linear Regression

Mhonde, Ngoni; Schreithofer, Nora; Corin, Kirsten; Makela, Mikko

Abstract

The combined effect of dissolved ions and water temperature on the adsorption of a xanthate collector on chalcopyrite and pentlandite was investigated using multiple linear regression. Cationic species improved the adsorption of the collector on sulphide minerals through xanthate adsorption activation. Thiosulphate ions generally had a negative effect on collector adsorption, and the interaction of thiosulphate ions and cations effectively reduced collector adsorption on the sulphide minerals. With regards to temperature variation caused by seasonal variation, this study suggests that temperature can influence the adsorption of collectors in the flotation process and this should be approached on a case by case basis as it seems to differ with the type of mineral under investigation. These fundamental results prompt a discussion on how complex water matrices can affect interactions of reagents and sulphide minerals at the solid-liquid interface and the possible effect on flotation performance.

Keywords

pentlandite; chalcopyrite; adsorption; multiple linear regression; temperature; passivation

Published in

Minerals
2020, volume: 10, number: 9, article number: 733
Publisher: MDPI

Authors' information

Mhonde, Ngoni
Aalto University
Schreithofer, Nora
Aalto University
Corin, Kirsten
University of Cape Town
Swedish University of Agricultural Sciences, Department of Forest Biomaterials and Technology
VTT Technical Research Centre of Finland

UKÄ Subject classification

Geochemistry

Publication Identifiers

DOI: https://doi.org/10.3390/min10090733

URI (permanent link to this page)

https://res.slu.se/id/publ/108678