Add time:09/27/2019         Source:sciencedirect.com

Although Dodecylamine (cas 124-22-1) (DDA) is a conventional collector for the flotation of smithsonite, the interaction mechanism between DDA and smithsonite is still unclear. In this study, time-of-flight secondary ion mass spectrometry (ToF-SIMS) and principal component analysis (PCA) were used to investigate the surface products of smithsonite with DDA adsorption before and after sulfidization. The spectra analysis showed that the organic peaks CxHy+, CN−, and CNO− dominate the spectra of the smithsonite samples, eclipsing the inorganic peaks and DDA-related peaks. PCA analysis effectively identified the spectral differences between the different samples, indicating that DDA hardly interacted with the hydrated smithsonite surface; the zinc‑sulfur complex on the sulfidized smithsonite surface existed in the form of ZnaSbOcHd; DDA was chemisorbed on the sulfidized smithsonite surface and may occur in the form of N-S-Zn, N-Zn-S, or Zn-N-S bonds.

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