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최대웅 東義大學校産業技術開發硏究所 2008 産業技術硏究誌 Vol.22 No.-
The continuous extraction of cadmium ion from aqueous solution in a hollow fiber module was conducted using extractants of D2EHPA, Lix84, TOA and TBP, and the variation of extraction efficiency from mixed ion solution and mixed extractants was experimentally investigated. Comparison of the experimental outcome with a conventional solvent extraction and menbrane extraction leads to the following results. The continuous extraction improves the extraction efficiency and reduces solvent consumption and processing time. The mixed extractant systems is no significant effect. The menbrane extraction is more convenient than the conventional solvent extraction process, but the extraction efficiency is close. Other heavy metal ions do not affect the extraction of cadmium in quaternary mixed solution.
최대웅 東義大學校産業技術開發硏究所 2009 産業技術硏究誌 Vol.23 No.-
Comparison of the experiment outcome with the conventional solvent extraction process and the membrane extraction process lead to the following results. The continuous extraction process improves the extraction efficiency and solvent consumption and processing time. The coexisting elements give no significant effect on copper extract, while the mixed extractants of D2EPA-TOPO(TBP) systems reduce the extraction efficiency. The membrane extraction process is more convenient than the conventional solvent extraction process, but extraction efficiency is close.
최대웅 東義大學校 産業技術開發硏究所 1997 産業技術硏究誌 Vol.11 No.-
This study examines NI?? Liq-Liq Extraction by the microporous hollow fiber membrane, using D2EHPA as the metal extractant. After doing the experiments on the variation of H' concentration, flow rate and D2EHPA concentration which have important effects on Liq-Liq Extraction, it is known that the mass transfer increases as the flow rate and D2EHPA concentration increase when H' concentration is 10?? mol/d㎥ and for the Ni(II)-D2EHPA system, when H concentration is 10?? mol/d㎥ , kw is 12.64x10?? cm/sec.