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Preliminary Investigation of Rare Earth Elements Ion Exchange on Zeolites

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dc.date.accessioned 2016-08-02T09:12:40Z und
dc.date.accessioned 2017-10-24T12:19:23Z
dc.date.available 2016-08-02T09:12:40Z und
dc.date.available 2017-10-24T12:19:23Z
dc.date.issued 2016-08-02T09:12:40Z
dc.identifier.uri http://radr.hulib.helsinki.fi/handle/10138.1/5681 und
dc.identifier.uri http://hdl.handle.net/10138.1/5681
dc.title Preliminary Investigation of Rare Earth Elements Ion Exchange on Zeolites en
ethesis.discipline Radiochemistry en
ethesis.discipline Radiokemia fi
ethesis.discipline Radiokemi sv
ethesis.discipline.URI http://data.hulib.helsinki.fi/id/A18c84da-ebaf-4d10-9239-812b258a1067
ethesis.department.URI http://data.hulib.helsinki.fi/id/c2dd677c-da9c-4011-94b0-27b1585ac1cb
ethesis.department Kemiska institutionen sv
ethesis.department Department of Chemistry en
ethesis.department Kemian laitos fi
ethesis.faculty Matematisk-naturvetenskapliga fakulteten sv
ethesis.faculty Matemaattis-luonnontieteellinen tiedekunta fi
ethesis.faculty Faculty of Science en
ethesis.faculty.URI http://data.hulib.helsinki.fi/id/8d59209f-6614-4edd-9744-1ebdaf1d13ca
ethesis.university.URI http://data.hulib.helsinki.fi/id/50ae46d8-7ba9-4821-877c-c994c78b0d97
ethesis.university Helsingfors universitet sv
ethesis.university University of Helsinki en
ethesis.university Helsingin yliopisto fi
dct.creator Duplouy, Lucie
dct.issued 2016
dct.language.ISO639-2 eng
dct.abstract Found together in nature, the isolation of rare earth elements (REEs) has always been challenging. Their separation usually involves processes including solvent extraction, precipitation and ion exchange. Zeolites are well-known for their ion exchange capabilities that would be potentially applicable for the REEs separation. This study primarily investigated the ion exchange behavior of REEs onto several types of zeolites, namely the Ferrierite, the Faujasite and the Linde Type L. These zeolites were chosen because of their altered framework type and controllable charge density through synthesis. The commercially available zeolites were systematically characterized by means of X-Ray Diffraction (XRD), Energy Dispersive X-ray spectroscopy (EDX) and Attenuated Total Reflectance Fourier Transform Infrared spectroscopy (ATR-FTIR). Lanthanum was chosen as the model REE. The pH-uptake behavior of La on zeolites was studied extensively. Results showed that among all our selected zeolites, only LTL gave reasonable amount of La ion exchange capacity (0.16 mmol/g at pH 3). Subsequently, the ion exchange isotherm of La on LTL was described at pH 3. The isotherm followed Langmuir type with a maximum capacity of 0.25 mmol/g. An equimolar ternary mixture of lanthanum, neodymium and dysprosium was used to test the selectivity of LTL zeolite towards different REEs. Results suggested that the uptake sequence followed La > Nd > Dy, which indicated the decrease of capacity with increased atomic number. Almost all the REEs could be leached off from the REE loaded zeolites with a pH 1.51 nitric acid solution. en
dct.language en
ethesis.language.URI http://data.hulib.helsinki.fi/id/languages/eng
ethesis.language English en
ethesis.language englanti fi
ethesis.language engelska sv
ethesis.thesistype pro gradu-avhandlingar sv
ethesis.thesistype pro gradu -tutkielmat fi
ethesis.thesistype master's thesis en
ethesis.thesistype.URI http://data.hulib.helsinki.fi/id/thesistypes/mastersthesis
dct.identifier.urn URN:NBN:fi-fe2017112252028
dc.type.dcmitype Text

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