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Characterisation and application of complexes based on chitosan and amidated pectin for removal of azo dyes from aqueos solutions

dc.contributor.advisorAntonović, Dušan
dc.contributor.otherKalagasidis Krušić, Melina T.
dc.contributor.otherOnjia, Antonije E.
dc.contributor.otherPopović, Aleksandar
dc.creatorNešić, Aleksandra
dc.date.accessioned2018-03-05T13:22:33Z
dc.date.available2016-01-05T12:41:24Z
dc.date.available2018-03-05T13:22:33Z
dc.date.issued2012
dc.identifier.urihttp://eteze.bg.ac.rs/application/showtheses?thesesId=205
dc.identifier.urihttps://fedorabg.bg.ac.rs/fedora/get/o:5457/bdef:Content/download
dc.identifier.urihttp://vbs.rs/scripts/cobiss?command=DISPLAY&base=70036&RID=41106447
dc.identifier.urihttp://nardus.mpn.gov.rs/123456789/2854
dc.identifier.urihttp://vinar.vin.bg.ac.rs/handle/123456789/7250
dc.description.abstractPoslednjih godina se sve veća pažnja posvećuje očuvanju životne sredine. Ispuštanje azo bojau vodenu sredinu dovodi do kontaminacije vode i predstavlja ozbiljan ekološki problem. Azoboje podložne su bioakumulaciji, a zbog kancerogenih, mutagenih i teratogenih svojstavaneretko su pretnja zdravlju ljudi i očuvanju okoline. Proces adsorpcije je sve zastupljeniji uobradi svih vrsta otpadnih voda, pa tako i onih koje sadrže azo boje, zbog ekonomičnosti,jednostavnosti procesa i stepena efikasnosti prečišćavanja otpadnih voda.S obzirom da se sve veća pažnja poklanja ispitivanju adsorbenata koji potiču iz obnovljivihizvora i koji su biodegradabilni, zbog ekoloških i ekonomskih uslova, predmet ovog rada jepriprema i karakterizacija kompleksa koji se zasnivaju na prirodnim polisaharidima, pektinu ihitozanu. U ovom radu ispitivani su kompleksi hitozan/poli(itakonska kiselina) i amidovanipektin/poli(itakonska kiselina) pri udelima poli(itakonske kiseline) od 10-90% u kompleksu.Takodje, ispitivani su i kompleksi hitozan/montmorilonit i amidovani pektin/montmorilonit,pri udelu montmorilonita od 10-50%. Ovi kompleksi su karakterisani Elementarnomanalizom, Fourier transformisanom infracrvenom spektroskopijom (FTIR), Skenirajućomelektronskom spektroskopijom (SEM) i Termogravimetrijom (TG).Analizom FTIR spektara je potvrdjen sastav svih kompleksa. SEM analizom je utvrdjenamorfologija ovih kompleksa, kao i promene nastale na površini uzoraka nakon adsorpcijeboje. Analizom termograma ustanovljeno je da montmorilonit ima veliki uticaj na termijskustabilnost kompleksa hitozan/montmorilonit i amidovani pektin/montmorilonit.Montmorilonit pri malom udelu u kompleksu, dovodi do povećane termijske stabilnosti,naspram čistog hitozana, odnosno amidovanog pektina, dok sa porastom montmorilonita do50% u kompleksu, dolazi do opadanja termijske stabilnosti. Poli(itakonska kiselina) takodjepospešuje termijsku stabilnost kompleksa naspram čistih komponenti.U ovom radu je ispitana kinetika adsorpcije anjonske Reactive Orange 16 boje iz vodenihrastvora na komplekse hitozan/poli(itakonska kiselina) i hitozan/montmorilonit, pri različitimodnosima komponenti u kompleksu. Takodje, ispitivana je i kinetika adsorpcije katjonskeBasic Yellow 28 boje iz vodenih rastvora na komplekse amidovani pektin/poli(itakonskakiselina) i amidovani pektin/montmorilonit pri različitim odnosima komponenti. Ispitivan jeuticaj početne koncentracije boje (30, 50 i 80 ppm), zatim uticaj temperature (8, 25, 37 i 55°C), uticaj pH vrednosti rastvora (2, 4, 5, 6 i 7,4) , kao i uticaj različitog odnosa komponenti ukompleksu na kinetiku adsorpcije i adsorpcioni kapacitet. Radi utvrdjivanja kinetike i2mehanizma adsorpcije, ispitivana su četiri različita kinetiča modela: Lagergren-ov modelpseudo-prvog reda, Ho-ov model pseudo-drugog reda, Jelovičev model i modelunutarčestične difuzije. Ispitivana su tri modela adsorpcionih izotermi: Langmuir-ova, Freundlich-ova i Temkin-ova adsorpciona izoterma...sr
dc.description.abstractEnvironmental protection has been a topic of great attention in recent years. Discharging azodyes in aquatic systems leads to contamination of water and exhibits serious ecologicalproblems. Azo dyes are subject to bioaccumulation, and due to their allergenic,cancerogenic, mutagenic and teratogenic properties they are a grave threat to people and theenvironment. Adsorption process is becoming incerasingly popular as a way of treatment ofvarious kinds of wastewaters, among them the azo-dyes containing ones, because it iseconomically feasible, processes are simple and there is a high level of efficiency present insuch processes.The increasingly interesting adsorbents are those that stem from sustainable sources and arebiodegradable – both from ecological and economical point of view. The aim of this study ispreparation and characterization of polymer complexes based on naturally occuringpolysaccharides – pectin and chitosan. This study presents the preparation andcharacterization of chitosan/poly(itaconic acid) and amidated pectin/poly(itaconic acid)complexes containing between 10 and 90% of poly(itaconic acid). The complexeschitosan/montmorillonite and amidated pectin/montmorillonite having between 10 and 50%of montmorillonite were prepared as well. The complexes were characterized by elementalanalisys, Fourier Transformed Infrared spectroscopy, Scanning electron microscopy andthermogravimetry.FTIR analysis confirmed the composition of all complexes. SEM analysis confirmed themorphology of these complexes, and changes in morfology after dye adsorption. It wasshown that after adsorption on the surface of complexes has changed, and a large number ofagglomerate and roughness appeared. Thermogravimetry has shown that the amount ofmontmorilonite in chitosan/montmorillonite and amidated pectin/montmorillonite complexeshad big influence on thermal stability. Montmorillonite increased thermal stability ofcomplexes, but this effect was most pronounced at low amounts of MMT in the system, whileat higher content of MMT the decomposition temperature decreased. Poly(itaconic acid)improved the thermal stability of complexes.This study investigated the adsorption kinetics of Reactive Orange 16 dye from aqueoussolutions on chitosan/poly(itaconic acid) and chitosan/montmorillonite complexes usingvarious component amounts. The adsorption kinetics of Basic Yellow 28 azo-dye fromaqueous solutions on amidated pectin/poly(itaconic acid) and amidated4pectin/montmorillonite complexes in various component amounts have also been studied.The influence of initial dye concentration (30, 50 and 80 ppm), temperature (8, 25, 37 and55˚C), pH value of the solution (2, 4, 5, 6 and 7,4) and the composition of complexes on thekinetics and adsorption mechanisms were the main focus of this work. The kinetics andadsorption mechanisms were investigated using four kinetic models: The Lagergren pseudofirstorder model, the Ho pseudo-second order model, the Elovich model and theintraparticular diffusion model. Three adsorption isotherms models were applied – Langmuir,Freundlich and Temkin. Before the experimental part the theoretical introduction has beenpresented containing the relevant information needed to asses the width of the problem andunderstanding the prniciples on which this study was based...en
dc.formatapplication/pdf
dc.languagesr
dc.publisherУниверзитет у Београду, Технолошко-металуршки факултетsr
dc.relationinfo:eu-repo/grantAgreement/MESTD/Integrated and Interdisciplinary Research (IIR or III)/43009/RS//
dc.rightsopenAccessen
dc.sourceУниверзитет у Београдуsr
dc.subjecthitozan, pektin, adsorpcija, azo bojesr
dc.subjectchitosan, pectin, adsorption, azo dyesen
dc.titleKarakterizacija i primena kompleksa na bazi hitozana i amidovanog pektina za uklanjanje azo boja iz vodenih rastvorasr
dc.titleCharacterisation and application of complexes based on chitosan and amidated pectin for removal of azo dyes from aqueos solutionsen
dc.typedoctoralThesisen
dc.rights.licenseBY-NC-ND
dcterms.abstractAнтоновић, Душан; Поповић, Aлександар; Калагасидис Крушић, Мелина Т.; Оњиа, Aнтоније; Нешић, Aлександра; Карактеризација и примена комплекса на бази хитозана и амидованог пектина за уклањање азо боја из водених раствора; Карактеризација и примена комплекса на бази хитозана и амидованог пектина за уклањање азо боја из водених раствора;
dc.identifier.fulltexthttp://vinar.vin.bg.ac.rs//bitstream/id/1444/Disertacija.pdf


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