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- 저자 : Osman Tutkun (검색결과 2 건)
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Osman Tutkun,Kurmancan Kaparova 한국화학공학회 2022 Korean Journal of Chemical Engineering Vol.39 No.4
Selective transport of gallium from HCl media containing other ions such as Zn, Co, and Ni, by polymerinclusion membranes (PIM), based on CTA/PVC blend using trioctylphosphine oxide (TOPO) as carrier and 2-nitrophenylpentylether (2-NPPE) as plasticizer is studied. The effect of various parameters such as the HCl concenration in thefeed, HCl concenration in the stripping phase, carrier (TOPO) concentration, 2-NPPE concentration, the cellulose triacetate(CTA)/poly(vinyl chloride) (PVC) as the polymer-blend was experimentally studied and the optimum conditions weredetermined. It was possible to selectively extract gallium ions from the ions (Zn, Co, and Ni) in the acidic solutions. Theseparation factors of gallium over Zn, Co, and Ni, at the optimum conditions, were found to be of 963, 702, and 514,respectively, for the feed solution of 100mg/dm3 Ga, 1,000mg/dm3 Zn, 600mg/dm3 Co, and 600mg/dm3 Ni.
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Ahmet Surucu,Volkan Eyupoglu,Osman Tutkun 한국공업화학회 2012 Journal of Industrial and Engineering Chemistry Vol.18 No.2
Cobalt and nickel are among the most important nonferrous metals. The using of flat sheet supported liquid membranes (FSSLMs) to remove metals from wastewaters has been used actively by the scientific and industrial communities. In this study, the selective separation of cobalt from thiocyanate solutions containing cobalt and nickel by FSSLM was examined using tri-n-octylamine (Alamine 300) as carrier. The FSSLM was consisted of extractant, flat sheet support and organic solvent. The various parameters were studied to determine the optimum extraction and striping conditions of cobalt and nickel. These parameters were stirring speeds of phases, NH4SCN concentration, pH, diluent type, extractant concentration, stripping reagent concentration and modifier concentration. Concentration of cobalt and nickel were determined by Shimadzu AA-6701GF spectrophotometer. In the optimum conditions,selective separation of cobalt was achieved with an efficiency of 98.4% within 8 h, for equimolar feed mixtures, 400 mg/L Co + 400 mg/L Ni, and the separation factor of Co(II) over Ni(II) was 234.4. In addition,for nonequimolar feed mixtures, 500 mg/L Co + 1000 mg/L Ni, Ni in excess, selective separation of cobalt was 99.9%, and the separation factor of Co was 506 in the same time.
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