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Raziskava karbonatnega ravnotežja vode s stabilnim izotopom ogljika ▫$(^{13}$▫C) : doktorska disertacijaPoberžnik, MojcaNaravne vode so zaradi svojega raznolikega porekla ter vpliva mnogih geokemijskih in bioloških procesov po svoji sestavi zelo kompleksne in različne. Organske in anorganske primesi vodo s svojo ... prisotnostjo plemenitijo, vendar hkrati nekatere od njih pod določenimi pogoji tvorijo spojine, ki povzročajo škodo na delih vodovodnega omrežja. Voda optimalne kakovosti za potrebe ljudi v vodovodnih inštalacijah ne sme povzročati korozije in ne odlagati mineralnih oblog. Za izpolnitev teh pogojev mora biti voda v termodinamičnem ravnovesju z mineralnima fazama kalcita in aragonita, primerne pH vrednosti in alkalitete. Vsebnost optimalne koli.ine ogljikovega dioksida, ki je naravna komponenta podzemne vode ob uporabi le-te v različne namene (pitna, tehnološka voda) nudi hkrati zaščito pred odlaganjem mineralnih oblog in preprečuje korozijo. Doktorska disertacija obravnava razvoj sodobne metode za optimizacijo kakovosti vode z uporabo ogljikovega dioksida, izdelavo hidro-kemijskega modela za simulacijo procesa pri višjih temperaturah in študij distribucije frakcij karbonatnega ravnotežja pri uvajanju specialnega izotopskega plina *CO2 (fÂ13C = -35,2 ). Na osnovi slednje so bili z uporabo izotopskih analiz (GC IRMS) določeni molski deleži prevladujoče frakcije karbonatnega ravnotežja (hidrogenkarbonatni ion) pri pogojih eksperimenta. Izračunane vrednosti so služile kot osnova za oceno učinkovitosti razvite metode uvajanja plina. Iz rezultatov eksperimentalnega dela ob uporabi označenega *CO2 plina lahko zaključimo, da dodan plin ob doseženem ravnotežju prispeva k nastanku skoraj polovice hidrogenkarbonatnih ionov. Učinek ultrazvočnega mešala v primeru stalne uporabe zmanjša učinkovitost metode za 14 %, vendar pospešuje raztapljanje plina v začetni fazi.Type of material - dissertation ; adult, seriousPublication and manufacture - [Maribor : M. Poberžnik], 2009Language - slovenianCOBISS.SI-ID - 13626134
Link(s):
http://dkum.uni-mb.si/Dokument.php?id=12042
Digital Library of the University of Maribor – DLUM
Digitalna knjižnica Slovenije - dLib.siDostop z namenskih računalnikov v prostorih NUK
Author
Poberžnik, Mojca
Other authors
Lobnik, Aleksandra |
Roš, Milenko
Topics
karbonatno ravnotežje vode |
pitna voda |
ogljikov dioksid |
uvajanje ogljikovega dioksida |
pilotne naprave |
hidrokemijski modeli |
izotop C13 |
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Database name | Field | Year |
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Poberžnik, Mojca | 19099 |
Lobnik, Aleksandra | 01407 |
Roš, Milenko | 06111 |
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