20.500.12556/RUL-95551 Eksperimentalno testiranje postopkov nanofiltracije poliamidamin-epiklorohidrinskih smol Experimental testing of procedures for nanofiltration of polyamideamine-epichlorohydrin resins V nalogi obravnavamo diafiltracijo raztopine PAE smole z namenom zmanjšanja vsebnosti stranskih produktov DCP in MCPD. Uporabljeni sta nanofiltracijski membrani Koch SR3D in Koch SelRO MPS-34, obe s parametrom MWCO 200 daltonov. Spremljamo kratkoročno in dolgoročno spreminjanje permeabilnosti membran in stopnjo zadrževanja DCP in MCPD. Filtracija je izvajana pri nevtralnem pH. Rezultati kažejo, da skladno s pričakovanji PAE smola membran ne prehaja. V nasprotju s pričakovanji DCP in MCPD skozi membrano ne prehajata neovirano. Rezultati kažejo tudi, da se membrana tekom delovanja ne maši, maši pa se med mirovanjem naprave. Sprememba pH med čiščenjem tako v kislo, kot v bazično okolje prispeva k hitrejšemu mašenju membrane. Diskusija obravnava mehanizme zadrževanja DCP in MCPD ter mašenja membran. The paper deals with diafiltration of a solution of PAE resin, the purpose of which is to lower the concentration of residuals DCP and MCPD. Nanofiltration membranes Koch SR3D and Koch SelRO MPS-34, both with MWCO of 200 daltons are used. Short term an long term changes in permeability of membranes, as well as rejection of DCP and MCPD are recorded. Filtration is taking place at neutral pH. As expected, results show that PAE resin does not permeate through the membrane. More unexpected is the fact that DCP and MCPD do not permeate through the membrane freely. Results show there is no membrane fouling during the operation, but the membrane fouls when the device is stationary. Change of pH both towards the acidic, as well as caustic environment, contributes to faster membrane fouling. We discuss mechanisms of rejection of DCP and MCPD and mechanisms of membrane fouling. nanofiltracija diafiltracija PAE smola mašenje membran stopnja zadrževanja efekt sita hidrofobnost površinski naboj sprememba pH mreženje polimerov nanofiltration diafiltration PAE resin membrane fouling membrane rejection sieving effect hydrophobicity surface charge change of pH polimer cross-linking true false false Slovenski jezik Angleški jezik Magistrsko delo/naloga 2017-09-20 14:57:27 2017-09-20 14:57:27 2022-08-10 06:31:11 0000-00-00 00:00:00 2017 0 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 1970-01-01 201364 1139.pdf 1139.pdf 1 00A0FD8E149DE6F5ECD692F169E79D4C 4cd250934fe3f75e8b325fce3e4fc73e9c0441539cf6fe3f81346f5f264b0173 c8c4bd3a-a1b3-11eb-a523-00155dcfd717 20.500.12556/rul/6cbd16cf-602a-4576-851a-3e22d6d08e0f https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=104157 Fakulteta za strojništvo 0 0 0