Nondispersive liquid-liquid extraction of copper and zinc from an aqueous solution by DEHPA and LIX 984 in a hollow fiber membrane module
- North Carolina A and T State Univ., Greensboro, NC (United States). Dept. of Chemical Engineering
A liquid-liquid extraction procedure was used to study the amounts of Zn{sup 2+} and Cu{sup 2+} that could be simultaneously extracted from aqueous solution with di(2-ethylhexyl) phosphoric acid (DEHPA) and LIX 984 diluted with n-heptane at equilibrium. LIX 984 is a 1:1 volume blend of LIX 860 (5-dodoecylsalicylaldoxime) and LIX 84 (2-hydroxy-5-nonylacetophenone oxime). At equilibrium, a 0.3 mol/L DEHPA-20% (v/v) LIX 984 solution extracted 99% of both the zinc and copper from a solution that had 100 ppm of each metal. A polysulfone hollow-fiber membrane module with 1 mm ID and 5,000-molecular weight cutoff was used to study the amounts of Zn{sup 2+} and Cu{sup 2+} that could be simultaneously extracted with a mixture of DEHPA and LIX 984. The aqueous and organic streams were operated at 100% recycle. With a 0.6 mol/L DEHPA-10% (v/v) LIX 984 solution, a 90.5 {+-} 1.7% (s.d.) extraction of zinc and a 93.70 {+-} 0.79% (s.d.) extraction of copper was obtained after 180 min.
- Sponsoring Organization:
- Environmental Protection Agency, Washington, DC (United States)
- OSTI ID:
- 354464
- Report Number(s):
- CONF-9710103--
- Journal Information:
- Separation Science and Technology, Journal Name: Separation Science and Technology Journal Issue: 6-7 Vol. 34; ISSN 0149-6395; ISSN SSTEDS
- Country of Publication:
- United States
- Language:
- English
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