Investigating the Electrochemical Interaction of a Thiol Collector with Chalcopyrite and Galena in the Presence of a Mixed Microbial Community
Loading...
Access rights
openAccess
URL
Journal Title
Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
This publication is imported from Aalto University research portal.
View publication in the Research portal (opens in new window)
View/Open full text file from the Research portal (opens in new window)
Other link related to publication (opens in new window)
View publication in the Research portal (opens in new window)
View/Open full text file from the Research portal (opens in new window)
Other link related to publication (opens in new window)
Date
2020-06
Major/Subject
Mcode
Degree programme
Language
en
Pages
16
Series
Minerals, Volume 10, issue 6
Abstract
High microbial cell counts have been recorded in sewage waters employed as process water in mineral beneficiation plants across the world. The presence of these microbes can negatively impact flotation performance through mineral passivation, although some microbes improve flotation performance as investigated in various bio-flotation studies. The current study aims to understand the electrochemical behaviour of minerals in the presence of a sodium ethyl xanthate (SEX) collector and microbes originating from a sulphide ore processing plant in South Africa. The electrochemical response was correlated to observe flotation performance. Mixed potential measurements were conducted in parallel to microflotation tests, to assess the hydrophilicity or hydrophobicity induced on sulphide minerals adapted to microbe-laden synthetic plant water. Sulphide minerals' mixed potentials and interactions of SEX with sulphide minerals were dramatically reduced in the presence of the mixed microbial community (MMC). The observations were correlated with poor flotation efficacy noted in microflotation tests. These fundamental results shed light on how the adsorption of thiol collectors on sulphide minerals is adversely affected by microbes, prompting a discussion on flotation process monitoring when mineral beneficiation is conducted using microbe-laden water.Description
| openaire: EC/H2020/730480/EU//ITERAMS
Keywords
electrochemistry, microbes, microflotation, recovery, adhesion, zeta potential, PLATINUM-GROUP MINERALS, WATER-BORNE BACTERIA, THIOBACILLUS-FERROOXIDANS, FLOTATION BEHAVIOR, ETHYL XANTHATE, PAENIBACILLUS-POLYMYXA, PYRITE, IMPACT, MECHANISM, ADHESION
Other note
Citation
Mhonde, N, Smart, M, Corin, K & Schreithofer, N 2020, ' Investigating the Electrochemical Interaction of a Thiol Collector with Chalcopyrite and Galena in the Presence of a Mixed Microbial Community ', Minerals, vol. 10, no. 6, 553, pp. 1-17 . https://doi.org/10.3390/min10060553