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- Title
Pollution Characteristics of Pyrite Surface in Cyanide Tailings by PCA-Assisted ToF-SIMS and Their Correlation with the Contact Angle.
- Authors
Zhao, Qianfei; Yang, Hongying; Tong, Linlin; Jin, Ruipeng
- Abstract
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.
- Subjects
PYRITES; CONTACT angle; SECONDARY ion mass spectrometry; CYANIDES; PRINCIPAL components analysis; POLLUTION
- Publication
JOM: The Journal of The Minerals, Metals & Materials Society (TMS), 2024, Vol 76, Issue 1, p555
- ISSN
1047-4838
- Publication type
Article
- DOI
10.1007/s11837-023-06143-4