Abstract
Solvent extraction of Cu(II) from aqueous solutions by a soybean oil-based organic solvent (SOS) composing of soybean oil (diluent), di-2-ethylhexylphosphoric acid (extractant) and tributylphosphate (phase modifier) was investigated. Effects of initial Cu(II) concentration in the aqueous phase (25–500 mg/L (0.39–7.88 mM)) and temperature (298–323 K) on the percentage extraction (% E) of Cu(II) were studied. It was found that the initial Cu(II) concentration did not influence % E appreciably and high % E (>98%) was achieved throughout the experimental ranges studied. The % E at various temperatures, on the other hand, decreased consistently with temperature. The loading capacity of SOS (2400 mg/L (37.82 mM)), as well as the stoichiometry (4:1) and structure (inner sphere) of Cu(II)–organic complexes (extracted species) in SOS were also determined. Stripping of Cu(II) from the loaded SOS was investigated with various types (sulfuric acid (H 2SO 4), hydrochloric acid (HCl) and nitric acid (HNO 3)) and concentrations (0.05–2.00 M) of mineral acids. The decreasing order of percentage stripping (% S) of Cu(II) by various types of acids was found to be H 2SO 4 > HCl > HNO 3 throughout different concentrations studied, with H 2SO 4 attaining the highest % S (>99%) at 1.5 M.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
