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Pollution Characteristics of Pyrite Surface in Cyanide Tailings by PCA-Assisted ToF-SIMS and Their Correlation with the Contact Angle
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Pollution Characteristics of Pyrite Surface in Cyanide Tailings by PCA-Assisted ToF-SIMS and Their Correlation with the Contact Angle
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Journal Article
Pollution Characteristics of Pyrite Surface in Cyanide Tailings by PCA-Assisted ToF-SIMS and Their Correlation with the Contact Angle
2024
Overview
The surface wettability of pyrite, as the main gold-bearing mineral in cyanide tailings, significantly influences flotation performance. This work discusses the interaction mechanism between CN and the pyrite surface using XPS and etching (via ToF-SIMS signals). Additionally, the contaminant species affecting the contact angle of the pyrite surface were determined. The results showed that CNO /SCN and FeCN /FeSCN were major and minor cyanide-containing substances on the surface of cyanide pyrite, respectively. After 24 h of cyanidation, a deposition film with a depth of 16.75 nm formed on the pyrite surface. Principal component analysis was employed to assist time-of-flight secondary ion mass spectrometry (ToF-SIMS) in further studying the distribution of contact angles of cyanide-pyrite particles. The results demonstrated that the variation of surface sessile drop contact angle values of pyrite was correlated with the chemical complexity. A ToF-SIMS contact angle model containing three secondary ion peaks of CN , SCN , and FeOOH+ was derived to predict the contact angle on the surface of cyanide pyrite and provide technical support for the secondary resource utilization of cyanide tailings.
Publisher
Springer Nature B.V
