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Uklanjanje visokog sadržaja organskih i neorganskih polutanata iz podzemnih voda Vojvodine primenom nanofiltracije / Organic and inorganic polutants high content removal from Vojvodina groundwater by application of nanofiltrationKukučka Miroslav 23 September 2016 (has links)
<p>Cilj ovog rada je ispitivanje mogućnosti uklanjanja visokih koncentracija organskih i neorganskih materija iz vodenih rastvora „Cross-Flow“ nanofiltracijom primenom spiralno uvijenih membrana. Mogućnosti separacije NOM-a, amonijum-jona i ukupnog arsena su ispitivane na koncentratima-otpadnim vodama dobijenim iz industrijskih nanofiltracionih uređaja i obuhvaćeni su eksperimentima serije NFCP. Izdvajanje visokih koncentracija jona kalcijuma, magnezijuma, gvožđa i mangana je ispitivano iz prirodnih podzemnih voda i izvedeno je u eksperimentima serije NFWP. Određeni su optimalni fluksevi i transmembranski pritisci, kao i koncentracije doziranja kompleksirajućih supstanci. Dobijeni poluindustrijski rezultati su praktično primenjivi u velikoj skali za pripremu pijaće vode kako iz dubokih, tako i iz plitkih akvifera. Primena prikazanih rezultata u pripremi vode za piće od vode dubokih izdani uz značajne uštede resursa je namenjena prvenstveno lokacijama u Panonskom basenu. Tretman bunarske vode plitkih izdani je pogodan posebno zbog dodatka organskih kompleksirajućih agenasa koji supstituišu uobičajene postupke deferizacije i demanganizacije i na taj način znatno smanjuju kako investicione, tako i eksploatacione troškove postrojenja. Dobijeni rezultati su poslužili kao osnova za izradu idejnog rešenja industrijskog postrojenja za kondicioniranje pijaće vode od bunarske vode duboke izdani iz regiona grada Zrenjanina, kao i izradu idejnog rešenja industrijskog postrojenja za kondicioniranje pijaće vode od bunarske vode plitke izdani regiona grada Bačke Palanke za naseljeno mesto Despotovo.</p> / <p>The goal of this thesis was to examine removal possibility of high concentrations of organic and inorganic matter from aquatic solution using “Cross-flow” spiral wound nanofiltration membranes. Natural organic matter, ammonia ions and total arsenic removal was examined using concentrates – waste water obtained from industrial nanofiltration plant and they present NFCP experiment series. Removal of high concentrations of calcium, magnesium, iron and manganese ions was a part of NFWP experiments and was conducted using natural groundwater. Optimal fluxes and transmembrane pressures, as well as complexing substances dosage concentrations were determined. Obtained results in semi industrial scale are practically applicable on the large scale plants for drinking water preparation from deep wells, as well as from shallow aquifers. Application of presented results, concerning drinking water preparation from deep wells with significant savings of water resources, is designed especially for locations in Pannonia basin. Shallow aquifer well water treatment is applicable in practice especially because of addition of organic complexation agents that substitutes conventional deferization and manganese removal methods ultimately reducing investment and exploitation costs. On the basis of obtained results, industrial plant that produces drinking water from Zrenjanin aquifer deep well was designed. Furthermore, potable water industrial plant was designed that used shallow aquifer well water located in Bačka Palanka region, settlement Despotovo.</p>
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Obrazovanje hloridnih i bromidnih kompleksa kobalta(II) u električki nesimetričnim vodenim rastopima soli / Cobalt(II) chloride and bromide complex formation in electrical unsymmetric aqueous molten saltsVraneš Milan 23 February 2009 (has links)
<p>U ovoj doktorskoj disertaciji proučavano je građenje kompleksa kobalta(II) sa hloridnim i bromidnim jonima u vodenim rastopima tipa xCa(NO3)2·zH<sub>2</sub>O – (1-x)NH<sub>4</sub>NO<sub>3 </sub>pri različitom sastavu soli (x= 0,3 – 0,9), različitom sadržaju vode (z= 2,67 – 6,67) i na različitim temperaturama (45, 55 i 65<sup>o</sup>C).</p><p>Istraživanja su imala za cilj proučavanje reakcije građenja kompleksa kobalta(II) sa hloridnim i bromidnim jonima u vodenim rastopima xCa(NO<sub>3</sub>)<sub>2</sub>·zH<sub>2</sub>O – (1–x)NH<sub>4</sub>NO<sub>3</sub>, uticaja temperature, sastava elektrolita i sadržaja vode na proces kompleksiranja, kao i određivanje termodinamičkih parametara koji karakterišu reakcije asocijacije u ovim sistemima. Ovakvi rastopi soli su posebno interesantni zbog svoje niske tačke topljenja i visoke latentne toplote topljenja pa se mogu koristiti kao fazno-promenljivi materijali za skladištenje toplotne energije.</p> / <p>In this thesis absorption spectra of cobalt(II) chloride and bromide in calcium nitrate – ammonium nitrate – water system of the composition xCa(NO<sub>3</sub>)<sub>2</sub>·zH<sub>2</sub>O – (1–x)NH<sub>4</sub>NO<sub>3 </sub>(x= 0.30 - 0.90 and z= 2.67 – 6.67) have been investigated in the wavelength range 400-800 nm at three different temperatures: 45, 55 and 65<sup>o</sup>C.</p><p>Temparature, composition of the melt and water content influence on complex formation reactions between cobalt(II) and halide ions in aqueous xCa(NO<sub>3</sub>)<sub>2</sub>·zH<sub>2</sub>O –<br />(1–x)NH<sub>4</sub>NO<sub>3</sub> melts have been studied. Thermodynamic parameters for cobalt(II) – halide association process in different solvents also were determined.</p><p>Investigated systems are interesting because of their high values of latent heat of fusion and low melting points. Due to these reasons, some melts are proposed for <br />heat energy storage materials, usually known as phase change materials (PCM).</p>
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