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5303. Removal of manganese in batch and fluidized bed systems using beads of zeolite a as adsorbentMina Jovanovic, Iztok Arčon, Janez Kovač, Nataša Novak Tušar, Bojana Obradovic, Nevenka Rajić, 2016, original scientific article Abstract: In this study the uptake capacity of Mn(II) ions by zeolite A beads was investigated for different initial Mn concentration (100e400 mg Mn dm^-3) in batch mode at 25e55 C. The obtained adsorption capacity varying from 30 to 50 mg Mn g^-1 demonstrated a high affinity of zeolite A towards Mn(II) present in solutions. Kinetic studies indicated the intra-particle diffusion as the rate limiting step up to 45 C with apparent diffusivities in the range (1.2e2.0) x 10^-13 m2 s^-1 and the activation energy of 21.9 kJ mol^-1, which implies strong interactions between the zeolite A and Mn ions. At 55 C ion-exchange became the rate limiting step. The adsorption isotherms were studied at 25 C showing that the Mn adsorption is the best described by the Langmuir model suggesting a homogenous zeolite surface. XPS analysis of the Mnloaded beads showed that there is no surface accumulation of Mn but an almost uniform Mn distribution inside zeolite A, whereas XANES and EXAFS suggested that the adsorption of Mn(II) was followed by the Mn(II) oxidation and oxide formation. Regeneration of the spent zeolite was examined in 8 adsorption/desorption cycles by a chelating Na2EDTA in a fluidized column. It has been found that zeolite A beads could be reused for at least 4 cycles with satisfactory Mn(II) adsorption efficiencies of about 70%.
Keywords: Zeolite A
Manganese
Adsorption kinetics
EXAFS/XANES
XPS
Published in RUNG: 01.04.2016; Views: 5258; Downloads: 0
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5305. The Problem of Interpreting and Receiving Prešeren's Poem To the PoetZoran Božič, 2014, original scientific article Abstract: The poem To the Poet represents one of the pinnacles of Prešeren's artistic expression, however, numerous interpreters had difficulties with its extreme pessimism. In accordance with the belief that one should first and foremost recognise “the sharp-sighted eagle” in the first national poet, interpreters tried to revaluate this
pessimism with the cult of poetic mission. Empirical reception test demonstrated that the structure of the poem actually enables diverse, even completely illogical understandings of rhetorical questions, most probably on account of psychological influence of negation.
Keywords: empirical test, interpretation, Prešeren, reception, To the Poet
Published in RUNG: 31.03.2016; Views: 4878; Downloads: 251
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5306. The Baptism at the Savica by France Prešeren as a Successful Attempt to Outwit Censorship: a Romantic Confession of a Defeated Person, a Member of an Unfree NationZoran Božič, 2014, original scientific article Abstract: Baptism at the Savica, an epic about the loss of Slovenian independence, can also be understood as a successful attempt by France Prešeren to outwit censors and use the form of a historic tale as a metaphor for expressing the content which, due to censorship, had to be omitted from his elegy Dem Andenken des Matthias Čop. Such an approach can help us resolve several
apparent contradictions, shown in the interpretative history of the Baptism, such as the problem of Prešeren’s own characterisation of the poem in his letter to Čelakovský, or the question of Črtomir’s conversion at the end of the third part of this epic poem.In the 20th century, several interpretations came into being that understood Črtomir’s conversion to Christianity as an inevitable choice made by Slovenians in favour of a stronger, uniquely prospective Western culture circle, which serves as justification for Črtomir’s renunciation of freedom-loving Slovenianhood. According to the new understanding of The Baptism at the Savica, there are two Črtomirs, one is the hero and the other is the defeated one (the former, as he himself would like to be, is only an illusion by Prešeren, and the latter, as he indeed is, is the one with whom the poet completely
identifies himself), and the final message of the epic poem is understood as a condemnation of national inequality.
Keywords: Prešeren, Baptism at the Savica, open work, censorship, interpretation, national inequality
Published in RUNG: 31.03.2016; Views: 4792; Downloads: 297
Full text (191,44 KB) |
5307. Sprejemanje Prešernovih pesmi: razumevanje,nerazumevanje, oboževanjeZoran Božič, 2007, original scientific article Abstract: Prva mnenja o recepcijski zahtevnosti Prešernovih pesmi so se pojavila že v času njegovega življenja, obsežne razlage pesmi in opozorila na napake v razumevanju pa dokazujejo, da imajo
težave s Prešernovo poezijo tudi izobraženci. Raziskava Bože Krakar Vogel je potrdila zelo slab kognitivni odziv celo pri študentih slovenistike, s tem da le-ti Prešernove pesmi vseeno visoko vrednotijo, kar lahko pojasnimo z mitičnimi razsežnostmi nacionalnega pesniškega prvaka. Primerjava
Krsta pri Savici z Jenkovim Ognjeplamtičem razkriva, zakaj je Prešernova romantična pesnitev recepcijsko bolj zahtevna, to spoznanje pa potrjuje empirična raziskava v prvem letniku
ekonomske gimnazije, ki je izpričala izjemno slabo razumevanje Krsta pri Savici.
Keywords: Prešeren, poezija, recepcija, razumevanje, nacionalni mit
Published in RUNG: 31.03.2016; Views: 4303; Downloads: 233
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5308. Vrednotenje Prešernovih pesmi kot recepcijski problemZoran Božič, 2011, original scientific article Abstract: Razprava v povezavi s šolskim izborom Prešernovih pesmi obravnava problem vrednotenja Prešernovih pesmi. Sodobna didaktika književnosti pri izboru leposlovnih besedil v srednješolskih berilih priporoča predvsem upoštevanje recepcijskega in literarnozgodovinskega načela. Raziskava vrednotenjskih meril treh vodilnih prešernoslovcev druge polovice 20. stoletja prinaša spoznanje, da kljub temu, da med njimi obstajajo tudi pomembne razlike, literarni zgodovinarji najviše vrednotijo predvsem formalno zapletene in recepcijsko zahtevne pesmi iz osrednjega obdobja Prešernove romantike. Čeprav se tudi pri dijakih pozna
vpliv literarnozgodovinskega načela, ti najviše vrednotijo formalno preprostejše in recepcijsko manj zahtevne Prešernove pesmi, predvsem tiste, ki imajo zgodbo, so laže razumljive in
omogočajo polno doživljanje.
Keywords: Prešeren, vrednotenje, recepcija, literarna zgodovina, srednja šola
Published in RUNG: 31.03.2016; Views: 4259; Downloads: 236
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5309. Podoba govorne slovenščine v TV-igri Avtostop Dušana JovanovičaZoran Božič, 1974, original scientific article Abstract: Pisatelj D. Jovanovič označuje svoje osebe glede na njihovo družbeno in zemljepisno pripadnost s količino glasoslovnih značilnosti posameznih socialnih zvrsti (zbornega jezika, splošnega in pokrajinskega pogovornega j., narečja).
Za vse te vrste jezika je značilna nedosledna razvrstitev glasoslovnih značilnosti. Nezborno besedje in oblikoslovje s skladnjo krepijo to zvrstno razslojenost. Uporaba sredstev za karakterizacijo je zavestna.
Keywords: jezikoslovje, socialne zvrsti, televizija, književnost, Jovanovič
Published in RUNG: 31.03.2016; Views: 4739; Downloads: 128
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5310. Postopek za predelavo papirniškega blata v bioplin in surovino za kartonLeon Kaluža, Gregor Drago Zupančič, 2014, patent Abstract: Predmetni izum se nanaša na anaerobno obdelavo aerobnega aktivnega blata in njegovo pretvorbo v bioplin. Blata kot neobdelanega substrata ni mogoče zadovoljivo pretvoriti v bioplin zaradi predolgega zadrževalnega časa za anaerobni razkroj in prenizke biorazgradljivosti. Predmetni izum predstavlja postopek za preobdelavo aerobnega blata iz proizvodnje kartona v bioplin, ki obsega najprej ustrezno hidrolizo blata, ki ji sledi predelava hidrolizata po anaerobnem postopku v UASB reaktorju. Prvi proces predstavlja tehnologijo, kjer blato solubiliziramo pri pH 12 in 70 °C, hidrolizat dodajamo v odpadno vodo in mešanico brez težav obdelamo v konvencionalnem UASB reaktorju za čiščenje papirniške odpadne vode. V tem primeru je mogoče brez težav obdelati mešanico z dodatkom hidrolizata 5(v/v) %, proizvodnjo bioplina pa povišamo za do 20 %. Trdni preostanek po hidrolizi, ki je higieniziran, je uporaben kot surovina v proizvodnji kartona, če se dodaja v primerno nizki koncentraciji 1(m/m)%, ki ne degradira bistveno lastnosti standardnih surovin.
Keywords: Aktivno blato, Bioplin, Surovina za karton
Published in RUNG: 30.03.2016; Views: 5054; Downloads: 0
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