| fullrecord |
[{"key": "dc.contributor.author", "value": "Tiihonen, Antti", "language": null, "element": "contributor", "qualifier": "author", "schema": "dc"}, {"key": "dc.date.accessioned", "value": "2014-09-16T12:16:18Z", "language": null, "element": "date", "qualifier": "accessioned", "schema": "dc"}, {"key": "dc.date.available", "value": "2014-09-16T12:16:18Z", "language": null, "element": "date", "qualifier": "available", "schema": "dc"}, {"key": "dc.date.issued", "value": "2014", "language": null, "element": "date", "qualifier": "issued", "schema": "dc"}, {"key": "dc.identifier.other", "value": "oai:jykdok.linneanet.fi:1445836", "language": null, "element": "identifier", "qualifier": "other", "schema": "dc"}, {"key": "dc.identifier.uri", "value": "https://jyx.jyu.fi/handle/123456789/44267", "language": null, "element": "identifier", "qualifier": "uri", "schema": "dc"}, {"key": "dc.description.abstract", "value": "Ty\u00f6n tarkoituksena oli selvitt\u00e4\u00e4 soveltuvia kemiallisia tekniikoita harvinaisten\nmaametallien erottamiseen sek\u00e4 luontaisista, ett\u00e4 ihmisper\u00e4isen teollisuuden l\u00e4hteist\u00e4.\nTavoitteena oli saavuttaa hyv\u00e4 n\u00e4kemys aiheen historiasta, kehityksest\u00e4 ja nykytilasta.\nHarvinaiset maametallit ovat kemiallisesti samankaltainen joukko, johon sis\u00e4ltyv\u00e4t\nskandium, yttrium ja lantanoidit. Ty\u00f6ss\u00e4 k\u00e4yd\u00e4\u00e4n l\u00e4pi harvinaisten maametallien\nkeskeinen kemia, k\u00e4ytt\u00f6, saatavuus ja maailmanmarkkinoiden asettamat haasteet.\nKiinan harvinaisten maametallien tuotanto ja sen aiheuttamat vaikutukset\nmaailmankauppapolitiikkaan ovat merkitt\u00e4vi\u00e4, ja ty\u00f6ss\u00e4 korostetaan t\u00e4ll\u00e4 hetkell\u00e4\nvallitsevaa tilannetta harvinaisten maametallien osasta kriittisin\u00e4 metalleina.\nHarvinaisten maametallien erotuksessa tarkastellaan k\u00e4yt\u00e4nn\u00f6n menetelmi\u00e4 ja niiden\nteoriaa keskittyen teollisessa mittakaavassa k\u00e4yt\u00f6ss\u00e4 oleviin ja potentiaalisesti\nhy\u00f6dynnett\u00e4viin prosesseihin, joilla harvinaiset maametallit pyrit\u00e4\u00e4n erottamaan eri\nraaka-aineista ja niiden puhtausastetta pyrit\u00e4\u00e4n parantamaan. Raaka-aineiden, eli\np\u00e4\u00e4asiassa kaupallisesti kannattavien mineraalien ja teollisuuden sivuvirtojen, jalostus\ntuotteiksi tapahtuu tavallisesti usean osaprosessin kautta, joista monessa harvinaisia\nmaametalleja k\u00e4sitell\u00e4\u00e4n liuostilassa. Liuostilan erotusprosesseista tarkastellaan\np\u00e4\u00e4asiassa kiinte\u00e4-nesteuuttoa ja neste-nesteuuttoa. Ty\u00f6ss\u00e4 k\u00e4sitell\u00e4\u00e4n lyhyemmin my\u00f6s\nkromatografisia menetelmi\u00e4 sek\u00e4 niihin liittyvi\u00e4 keskeisi\u00e4 reagensseja ja v\u00e4liaineita.\nLis\u00e4ksi k\u00e4sitell\u00e4\u00e4n muita harvinaisille maametalleille kehitettyj\u00e4 erotusmenetelmi\u00e4 ja\nniiden teoriaa. Erotusmenetelmien tavoitteena on saavuttaa mahdollisimman rikas\nkonsentraatti, josta harvinaiset maametallit ovat joko muunnettavissa kaupallisiksi\nv\u00e4lituotteiksi, tai edelleen k\u00e4sitelt\u00e4viss\u00e4 puhtaammiksi jakeiksi spesifisiin sovelluksiin.\nHarvinaisia maametalleja sis\u00e4lt\u00e4vi\u00e4 sovelluksia ja tuotteita on lukuisia, ja vaikka niist\u00e4\nyksitt\u00e4isess\u00e4 tapauksessa metallin osuus massan tai tuotteen arvon osalta olisi pieni, on\ntietyn harvinaisen maametallin k\u00e4ytt\u00f6 siin\u00e4 yleens\u00e4 v\u00e4ltt\u00e4m\u00e4t\u00f6nt\u00e4 toimivuuden\ntakaamiseksi. Harvinaisten maametallien kierr\u00e4tys on t\u00e4ll\u00e4 hetkell\u00e4 viel\u00e4 v\u00e4h\u00e4ist\u00e4 ja\nvaihtoehtoisten raaka-ainevirtojen hy\u00f6dynt\u00e4minen my\u00f6s vasta kehitteill\u00e4. Voidaan\nkuitenkin olettaa, ett\u00e4 hyvill\u00e4 innovatiivisilla erotusmenetelmill\u00e4 ja\nresurssitehokkuudella saadaan viel\u00e4 l\u00e4hiaikoina sellaisia l\u00e4hteit\u00e4 k\u00e4ytt\u00f6\u00f6n, joita ei t\u00e4n\u00e4\np\u00e4iv\u00e4n\u00e4 viel\u00e4 hy\u00f6dynnet\u00e4.", "language": "fi", "element": "description", "qualifier": "abstract", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Submitted using Plone Publishing form by Antti Tiihonen (anjutiih) on 2014-09-16 12:16:17.825418. Form: Pro gradu -lomake (https://kirjasto.jyu.fi/julkaisut/julkaisulomakkeet/pro-gradu-lomake). JyX data: [jyx_publishing-allowed (fi) =True]", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Submitted by jyx lomake-julkaisija (jyx-julkaisija@noreply.fi) on 2014-09-16T12:16:18Z\nNo. of bitstreams: 2\nURN:NBN:fi:jyu-201409162804.pdf: 1361966 bytes, checksum: a2db970a5e15e954d08713b39ebbcc63 (MD5)\nlicense.html: 4816 bytes, checksum: 7460f4b1d15c1bbe941ca46c240c4344 (MD5)", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Made available in DSpace on 2014-09-16T12:16:18Z (GMT). No. of bitstreams: 2\nURN:NBN:fi:jyu-201409162804.pdf: 1361966 bytes, checksum: a2db970a5e15e954d08713b39ebbcc63 (MD5)\nlicense.html: 4816 bytes, checksum: 7460f4b1d15c1bbe941ca46c240c4344 (MD5)\n Previous issue date: 2014", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.format.extent", "value": "1 verkkoaineisto (70 sivua)", "language": null, "element": "format", "qualifier": "extent", "schema": "dc"}, {"key": "dc.format.mimetype", "value": "application/pdf", "language": null, "element": "format", "qualifier": "mimetype", "schema": "dc"}, {"key": "dc.language.iso", "value": "fin", "language": null, "element": "language", "qualifier": "iso", "schema": "dc"}, {"key": "dc.rights", "value": "In Copyright", "language": "en", "element": "rights", "qualifier": null, "schema": "dc"}, {"key": "dc.title", "value": "Harvinaisista maametalleista ja niiden erotusmenetelmist\u00e4", "language": null, "element": "title", "qualifier": null, "schema": "dc"}, {"key": "dc.type", "value": "master thesis", "language": null, "element": "type", "qualifier": null, "schema": "dc"}, {"key": "dc.identifier.urn", "value": "URN:NBN:fi:jyu-201409162804", "language": null, "element": "identifier", "qualifier": "urn", "schema": "dc"}, {"key": "dc.type.ontasot", "value": "Pro gradu -tutkielma", "language": "fi", "element": "type", "qualifier": "ontasot", "schema": "dc"}, {"key": "dc.type.ontasot", "value": "Master\u2019s thesis", "language": "en", "element": "type", "qualifier": "ontasot", "schema": "dc"}, {"key": "dc.contributor.faculty", "value": "Matemaattis-luonnontieteellinen tiedekunta", "language": "fi", "element": "contributor", "qualifier": "faculty", "schema": "dc"}, {"key": "dc.contributor.faculty", "value": "Faculty of Sciences", "language": "en", "element": "contributor", "qualifier": "faculty", "schema": "dc"}, {"key": "dc.contributor.department", "value": "Kemian laitos", "language": "fi", "element": "contributor", "qualifier": "department", "schema": "dc"}, {"key": "dc.contributor.department", "value": "Department of Chemistry", "language": "en", "element": "contributor", "qualifier": "department", "schema": "dc"}, {"key": "dc.contributor.organization", "value": "University of Jyv\u00e4skyl\u00e4", "language": "en", "element": "contributor", "qualifier": "organization", "schema": "dc"}, {"key": "dc.contributor.organization", "value": "Jyv\u00e4skyl\u00e4n yliopisto", "language": "fi", "element": "contributor", "qualifier": "organization", "schema": "dc"}, {"key": "dc.subject.discipline", "value": "Ep\u00e4orgaaninen ja analyyttinen kemia", "language": "fi", "element": "subject", "qualifier": "discipline", "schema": "dc"}, {"key": "dc.subject.discipline", "value": "Inorganic and Analytical Chemistry", "language": "en", "element": "subject", "qualifier": "discipline", "schema": "dc"}, {"key": "dc.date.updated", "value": "2014-09-16T12:16:19Z", "language": null, "element": "date", "qualifier": "updated", "schema": "dc"}, {"key": "dc.type.coar", "value": "http://purl.org/coar/resource_type/c_bdcc", "language": null, "element": "type", "qualifier": "coar", "schema": "dc"}, {"key": "dc.rights.accesslevel", "value": "openAccess", "language": "fi", "element": "rights", "qualifier": "accesslevel", "schema": "dc"}, {"key": "dc.type.publication", "value": "masterThesis", "language": null, "element": "type", "qualifier": "publication", "schema": "dc"}, {"key": "dc.subject.oppiainekoodi", "value": "4031", "language": null, "element": "subject", "qualifier": "oppiainekoodi", "schema": "dc"}, {"key": "dc.subject.yso", "value": "metallit", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "harvinaiset maametallit", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "erotusmenetelm\u00e4t", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "rikastus", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.format.content", "value": "fulltext", "language": null, "element": "format", "qualifier": "content", "schema": "dc"}, {"key": "dc.rights.url", "value": "https://rightsstatements.org/page/InC/1.0/", "language": null, "element": "rights", "qualifier": "url", "schema": "dc"}, {"key": "dc.type.okm", "value": "G2", "language": null, "element": "type", "qualifier": "okm", "schema": "dc"}]
|