| Popis: |
This thesis presents the results of an investigation of chrysocolla flotation using n-octanohydroxamate collector. The complex formation and bonding behaviour of copper (II) hydroxamate and iron (III) hydroxamate were investigated. Acid-base titration analyses indicated that copper acetohydroxamate and copper octanohydroxamate complexes formed with a 1: 1 (copper: hydroxamate) stoichiometry. Raman spectroscopy, Fourier transform infrared spectroscopy (FTIR) and Atomic absorption spectroscopy (AAS) analyses were in agreement with the result. For the copper benzohydroxamate complex, acid-base titration analyses indicated a 1: 2 (copper: hydroxamate) stoichiometry. AAS analyses confirmed the stoichiometric ratio of 1: 2 (copper: hydroxamate). Raman and FTIR analyses were consistent with the results from the titration and AAS analyses. Iron (III) complexes with acetohydroxamate, benzohydroxamate and n-octanohydroxamate were characterised by using acid-base titrations. The titration graph results from the three complexes indicated a 1: 3 (iron: hydroxamate) stoichiometry. AAS analyses indicated the same result. Raman and FTIR analyses exhibited the molecular structure which supported a 1: 3 (iron: hydroxamate) stoichiometry. |
