University of Oulu

Hartmann, R., Kinnunen, P., Illikainen, M. (2018) Cellulose-mineral interactions based on the DLVO theory and their correlation with flotability. Minerals Engineering, 122, 44-52. doi:10.1016/j.mineng.2018.03.023

Cellulose-mineral interactions based on the DLVO theory and their correlation with flotability

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Author: Hartmann, R.1; Kinnunen, P.1; Illikainen, M.1
Organizations: 1Fibre and Particle Engineering Research Unit, University of Oulu
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 2.9 MB)
Persistent link: http://urn.fi/urn:nbn:fi-fe2018082834228
Language: English
Published: Elsevier, 2018
Publish Date: 2018-08-28
Description:

Abstract

Nowadays, humankind undergoes intensive efforts to minimize the environmental pollution worldwide. One main challenge is the reduction of chemicals based on mineral oil and petroleum by the employment of sustainable and environment-friendly alternatives. A promising candidate is cellulose, which is a green, sustainable and abundant polymer. Cellulose can be treated physically and chemically to obtain tailored properties, which enable the employment of cellulose in industrial processes, such as flotation. Nonetheless, the structure of cellulose, which differs substantially from conventional flotation reagents, leads to different behaviour in ore dressing and in subsequent particle-bubble attachment. Therefore, the interactions between cellulose and the minerals under different conditions is investigated using the Derjaguin-Landau, Verwey-Overbeek (DLVO) theory, comprising van-der-Waals and electrostatic interactions, and the results are put in context with flotation recoveries using a single gas capillary Hallimond tube. The results obtained indicate that van-der-Waals interactions are dominant at very close distances and electrostatic interactions at distances of several nanometres between cellulose and the minerals. Accordingly, this study illuminates that the occurrence of physisorption phenomena between cellulose and the minerals and efficient particle-bubble attachment depend on electrostatic interactions between them.

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Series: Minerals engineering
ISSN: 0892-6875
ISSN-E: 1872-9444
ISSN-L: 0892-6875
Volume: 122
Pages: 44 - 52
DOI: 10.1016/j.mineng.2018.03.023
OADOI: https://oadoi.org/10.1016/j.mineng.2018.03.023
Type of Publication: A1 Journal article – refereed
Field of Science: 215 Chemical engineering
Subjects:
Copyright information: © 2018 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/BY-NC-ND/4.0/).
  https://creativecommons.org/licenses/by-nc-nd/4.0/