The Extraction of Metal Contaminants Using Supercritical Carbon Dioxide

Int. J. Chemoinformatics Chem. Eng. Pub Date : 1900-01-01 DOI:10.4018/IJCCE.2018010104

Sesik Kang, Minsu Ju, Junghoon Kim

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引用次数: 1

Abstract

Conventionaldecontaminationmethodsutilizewater-basedsystems,whichgeneratehighamountsof secondarywastes.Herein,theauthorsdescribeanenvironmentallybenigndecontaminationmethod usingliquidandsupercriticalCO2.TheuseofCO2asasolventaffordseffectivewastereductionby itsabilitytoberecycled,therebyleavingbehindonlythecontaminantsuponitsevaporation.Inthis study,aCO2solutionprocesswasassessedusingt-butylsalen(t-salen),dicyclohexano-18Crown6 (DC18C6), 8-hydroxyquinoline (8-HQN), perfluoro-1-octanesulfonic acid tetra-ethylammonium salt(NEt4PFOSA),andpentadecafluorooctanoicacidammoniumsalt(NEt4PFOA)toextractspiked radioactivecontaminants(Nb,Zr,Co,Sr)fromaninertsamplematrix,namelywithfilterpaper.With thestaticextractionmethod,Srwasextractedwithamaximumextractionrateof97%,andNbwas extractedwithamaximumextractionrateof75%.Additionally,theauthorswerealsoabletoextract CoandZrwithmaximumextractionratesof73%and64%,respectively. KEywoRDS Carbon Dioxide, Extraction, Microemulsion, Supercritical

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超临界二氧化碳萃取金属污染物研究

Conventionaldecontaminationmethodsutilizewater-basedsystems，whichgeneratehighamountsof secondarywastes。Herein，theauthorsdescribeanenvironmentallybenigndecontaminationmethod usingliquidandsupercriticalCO2。TheuseofCO2asasolventaffordseffectivewastereductionby itsabilitytoberecycled，therebyleavingbehindonlythecontaminantsuponitsevaporation。研究在,二氧化碳解决方案过程使用评估伦叔丁基(t-salen)dicyclohexano-18Crown6(DC18C6), 8 -羟基喹啉(8-HQN)perfluoro-1-octanesulfonic酸tetra-ethylammonium盐(NEt4PFOSA),pentadecafluorooctanoic酸铵盐(NEt4PFOA)提取飙升放射性污染物(Nb,锆、,Sr)从一个惰性样本矩阵,即过滤器纸。With thestaticextractionmethod，Srwasextractedwithamaximumextractionrateof97%，andNbwas extractedwithamaximumextractionrateof75%。Additionally，theauthorswerealsoabletoextract CoandZrwithmaximumextractionratesof73%and64%，respectively。二氧化碳;萃取;微乳液

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Int. J. Chemoinformatics Chem. Eng.

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