magistrsko delo
Žiga Šrot (Avtor), Marjana Simonič (Mentor), Julija Volmajer Valh (Komentor), Matejka Turel (Komentor)

Povzetek

Magistrsko delo obravnava tematiko biorazgradnje zaščitnih mask. Zaščitne maske iz naravnih in sintetičnih materialov smo zakopali in pomešali s kompostom. Zaradi vse višje globalne onesnaženosti s plastičnimi odpadki in akumulacije mikroplastike v ekosistemih moramo nujno strmeti k alternativnim, bolj trajnostnim metodam spopadanja z odpadki. Eksperimentalni del smo opravili na respirometru slovenskega proizvajalca ECHO Instruments d.o.o. Pred samo raziskavo biorazgradnje smo izvedli preliminarni test, s katerim smo določili aktivnosti izbranih kompostov in tistega z najvišjo aktivnostjo določili za nadaljnje delo. Izbran kompost in razrezane koščke mask smo po standardu ISO 14855-2:2018 natehtali in pomešali v reaktorjih. Napolnjene reaktorje smo preko cevk povezali s senzorskim sistemom respirometra, kjer smo zagotavljali konstantne pogoje. Respirometrične meritve o biorazgradnji materialov smo zbirali dva meseca in pol. Stopnjo biorazgradljivosti materialov smo izračunali na podlagi meritev produkcije ogljikovega dioksida v reaktorjih in meritev vsebnosti organskega ogljika v materialu ter izračunane vrednosti primerjali z referenčno snovjo – mikrokristalno celulozo. Rezultate o biorazgradljivosti materialov smo preverili še z FTIR spektrometrijo in s posnetki pod mikroskopom. Vzorci mask iz naravnih materialov so se razgradili precej dobro, najbolje med njimi delci maske iz mešanice lanu in bombaža (v 71,63 %), medtem ko so se delci maske iz polipropilena razgradili v 1,89 %.

Ključne besede

biorazgradnja;kompostiranje;mikrokristalna celuloza;zaščitne maske;FTIR spektoskopija;respirometrija;magistrske naloge;

Podatki

Jezik: Slovenski jezik
Leto izida:
Tipologija: 2.09 - Magistrsko delo
Organizacija: UM FKKT - Fakulteta za kemijo in kemijsko tehnologijo
Založnik: [Ž. Šrot]
UDK: 628.473.6.046(043.2)
COBISS: 148503811 Povezava se bo odprla v novem oknu
Št. ogledov: 72
Št. prenosov: 9
Ocena: 0 (0 glasov)
Metapodatki: JSON JSON-RDF JSON-LD TURTLE N-TRIPLES XML RDFA MICRODATA DC-XML DC-RDF RDF

Ostali podatki

Sekundarni jezik: Angleški jezik
Sekundarni naslov: Study of biodegradation of protective masks ( covid-19) based on respirometric measurments in compost
Sekundarni povzetek: The master's thesis deals with the topic of biodegradation of protective masks. Protective masks made of natural and synthetic materials were buried and mixed with compost. Due to the increasing global pollution with plastic waste and the accumulation of microplastics in ecosystems, we urgently need to strive for alternative, more sustainable methods of dealing with waste. The experimental part was carried out on a respirometer made by the Slovenian manufacturer ECHO Instruments d.o.o. Before the biodegradation study itself, we conducted a preliminary test to determine the activities of selected composts and selected the one with the highest activity for further work. The selected compost and shredded mask pieces were weighed according to the ISO 14855-2:2018 standard and mixed in reactors. We connected the filled reactors to a sensor system of the respirometer through pipes, where we ensured constant conditions. We collected respirometric measurements of material biodegradation for two and a half months. We calculated the biodegradability rate of the materials based on measurements of carbon dioxide production in the reactors and measurements of organic carbon content in the material, and compared the calculated values with a reference substance - microcrystalline cellulose. We also verified the results of material biodegradability using FTIR spectroscopy and microscope images. The samples of masks made from natural materials degraded quite well, with the best being the particles from masks made from a mixture of flax and cotton (at 71.63%), while particles from masks made from polypropylene degraded at a rate of 1.89%.
Sekundarne ključne besede: biodegradation;composting;protective facemasks;microcrystalline cellulose;FTIR spectroscopy;respirometry.;
Vrsta dela (COBISS): Magistrsko delo/naloga
Komentar na gradivo: Univ. v Mariboru, Fak. za kemijo in kemijsko tehnologijo
Strani: 1 spletni vir (1 datoteka PDF (XI, 52 f.))
ID: 18244247