An solvent extraction experiment was performed to extract copper from copper sulphate solution.
The procedures performed:
· A 500 mL stock solution of copper sulphate 0.01g/l Cu2+ was prepared using solid copper sulphate and deionized water.
· Copper extractant A for the first run was prepared in a 100 mL volumetric flask using 1mL of organic xylene and 90 mL diluent.
· Using the phase ratio of 1/5 : Vor/Va = 1/5, 5 mL of the organic extractant was added to 25 mL of aqueous phase stock solution.
· Then, the aqueous phase pH was adjusted through the addition of HCl drops as tabulated below in a separating funnel.
Run: Drops of 1M HCl:
1 25
2 20
3 15
4 10
5 8
6 5
7 2
8 0
· The separating funnel was then shook vigorously for two minutes whilst periodically venting.
· Thereafter, the funnel was allowed to sit for one minute
· The separating funnel was then shook vigorously shook again for another two minutes.
· After the two minutes had lapsed, the two phases were allowed to separate.
· The aqueous phase was drained off and the pH of this phase was measured and recorded by using a pH meter.
· Finally, copper analysis by AAS was performed by preparing standards in the concentration ranges of 20, 40, 50 and 100 ppm and testing the concentration of copper extracted into the aqueous phases for each run.
However now I'm stuck and do not know how to use the results from the AAS analysis to calculate % Copper extraction, distribution rate for each pH, log D and pH1/2 from log D vs. pH plot. Please help.
Hi Christine,
this is not my daily field of work now, but a 1 minute search with Google brought the following search result.
Article Solvent extraction of Cu, Mo, V, and U from leach solutions ...
Maybe this will help you.
Regards
Markus
Hi Christine,
You can calculate the extraction rate of copper under a single experiment with a pH value. The extraction rate of copper can be calculated by (total copper in organic/total copper by testing), you can read some paper. You must do the extraction experiment under different pH value, and test the concentration of the copper after extraction, in this way, you could do the following works.
Wish these will help you.
Hi Christine,
In addition the answer by Fuhui Cui, there is two article that reported the extraction and distribution ratio procedures.
1. Extraction of carrier-free 99Mo by ionic liquids from acid solutions: A model of seaborgium (Sg) experiment
- Applied Radiation and Isotopes 149
- DOI: 10.1016/j.apradiso.2019.04.020
2. Separation of 152+154Eu, 90Sr from radioactive waste effluent using liquid–liquid extraction by polyglycerol phthalate
- Nuclear Science and Techniques 29(6)
- DOI: 10.1007/s41365-018-0423-z Please look on them, it might be useful for your project.
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