| fullrecord |
[{"key": "dc.contributor.advisor", "value": "V\u00e4is\u00e4nen, Ari", "language": "", "element": "contributor", "qualifier": "advisor", "schema": "dc"}, {"key": "dc.contributor.author", "value": "Miettinen, Liisa", "language": "", "element": "contributor", "qualifier": "author", "schema": "dc"}, {"key": "dc.date.accessioned", "value": "2022-12-12T10:41:12Z", "language": null, "element": "date", "qualifier": "accessioned", "schema": "dc"}, {"key": "dc.date.available", "value": "2022-12-12T10:41:12Z", "language": null, "element": "date", "qualifier": "available", "schema": "dc"}, {"key": "dc.date.issued", "value": "2022", "language": "", "element": "date", "qualifier": "issued", "schema": "dc"}, {"key": "dc.identifier.uri", "value": "https://jyx.jyu.fi/handle/123456789/84297", "language": null, "element": "identifier", "qualifier": "uri", "schema": "dc"}, {"key": "dc.description.abstract", "value": "Tutkielma k\u00e4sittelee kirjallisen osan, jossa perehdyt\u00e4\u00e4n lannoitteiden valmistukseen, ioninvaihto tekniikoihin ja muihin vaihtoehtoisiin puhdistustekniikoihin. Sek\u00e4 kokeellisen osan, jonka p\u00e4\u00e4asiallisena tavoitteena on menetelm\u00e4n kehitys kadmiumin ja uraanin poistamiseksi fosforihaposta. Lis\u00e4ksi toissijaisena tavoitteena on tutkia, pystyt\u00e4\u00e4nk\u00f6 k\u00e4ytetty\u00e4 ioninvaihtohartsia pesem\u00e4\u00e4n, koska se mahdollistaisi ioninvaihtomateriaalin uusiok\u00e4yt\u00f6n.\n\nMenetelm\u00e4n optimoinnissa keskityttiin toimivan hartsin valitsemiseen, sopiva fosforihappo v\u00e4kevyyden valitsemiseen ja menetelm\u00e4n muiden muuttujien optimoimiseen. Menetelm\u00e4ss\u00e4 keskeisin\u00e4 muuttujina olivat kontaktiaika, l\u00e4mp\u00f6tila ja sekoituksen voimakkuus. Pesukokeissa keskityttiin l\u00f6yt\u00e4m\u00e4\u00e4n sopiva happo mill\u00e4 voitaisiin pest\u00e4 harstia. N\u00e4in ollen pesukokeissa muuttuvina tekij\u00f6in\u00e4 oli ainoastaan k\u00e4ytetty happo ja sen vahvuus.\n\nLopulliseksi tulokseksi saatiin, ett\u00e4 kadmium ja uraani on mahdollista poistaa 8,5 prosenttisesta fosforihappoliuoksesta ioninvaihdolla. T\u00e4m\u00e4 edellytt\u00e4\u00e4 kuitenkin kaksi vaiheista menetelm\u00e4\u00e4, koska uraani poistuu k\u00e4ytt\u00e4m\u00e4ll\u00e4 Lewatit TP 260 hartsia, kun taas kadmium poistuu Dowex 50 W x8 hartsilla. Menetelm\u00e4n ensimm\u00e4isess\u00e4 vaiheessa erotellaan siis uraani k\u00e4ytt\u00e4m\u00e4ll\u00e4 Lewatit hartsia ja toisessa vaiheessa erotellaan kadmium k\u00e4ytt\u00e4m\u00e4ll\u00e4 Dowex hartsia.\n\nLewatit TP 260 hartsilla uraanin poistamiseksi saavutettiin 80 \u00b1 1 % saanto, kun kontaktiaikana k\u00e4ytettiin 60 minuuttia ja testi suoritettiin huoneenl\u00e4mm\u00f6ss\u00e4. Lis\u00e4\u00e4m\u00e4ll\u00e4 kontaktiaikaa 120 minuuttiin p\u00e4\u00e4stiin uraanin poistossa, jopa 88 \u00b1 1 % saantoon. Menetelm\u00e4 toimi my\u00f6s fosforihappoa l\u00e4mmitett\u00e4ess\u00e4 60 \u00b0C:een asti, jossa uraania poistui 84 \u00b1 1 %.\n\nDowex 50W x8 hartsilla kadmiumin poistamiseksi saavutettiin 76 \u00b1 1 % saanto, kun kontaktiaikana k\u00e4ytettiin 15 minuuttia ja testi suoritettiin huoneenl\u00e4mm\u00f6ss\u00e4. Ajan lis\u00e4\u00e4minen ei parantanut kadmiumin poistumista. My\u00f6s t\u00e4m\u00e4 menetelm\u00e4 toimii fosforihappoa l\u00e4mmitett\u00e4ess\u00e4 60 \u00b0C:een asti, jossa kadmiumia poistui 81 \u00b1 1 %.", "language": "fi", "element": "description", "qualifier": "abstract", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Submitted by Paivi Vuorio (paelvuor@jyu.fi) on 2022-12-12T10:41:12Z\nNo. of bitstreams: 0", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Made available in DSpace on 2022-12-12T10:41:12Z (GMT). No. of bitstreams: 0\n Previous issue date: 2022", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.format.extent", "value": "64", "language": "", "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.subject.other", "value": "fosforihappo", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "fosfaattikivi m\u00e4rk\u00e4prosessi", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "ioninvaihto", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.title", "value": "Kadmiumin ja uraanin poisto fosforihaposta", "language": "", "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-202212125554", "language": "", "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": "Jyv\u00e4skyl\u00e4n yliopisto", "language": "fi", "element": "contributor", "qualifier": "organization", "schema": "dc"}, {"key": "dc.contributor.organization", "value": "University of Jyv\u00e4skyl\u00e4", "language": "en", "element": "contributor", "qualifier": "organization", "schema": "dc"}, {"key": "dc.subject.discipline", "value": "Analyyttinen kemia", "language": "fi", "element": "subject", "qualifier": "discipline", "schema": "dc"}, {"key": "dc.subject.discipline", "value": "Analytical Chemistry", "language": "en", "element": "subject", "qualifier": "discipline", "schema": "dc"}, {"key": "yvv.contractresearch.funding", "value": "0", "language": "", "element": "contractresearch", "qualifier": "funding", "schema": "yvv"}, {"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": null, "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": "40311", "language": "", "element": "subject", "qualifier": "oppiainekoodi", "schema": "dc"}, {"key": "dc.subject.yso", "value": "kadmium", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "lannoitteet", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "fosfaatit", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "uraani", "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"}]
|