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Title:Študij biorazgradnje zaščitnih mask (covid-19) na osnovi respirometrijskih meritev v kompostu : magistrsko delo
Authors:ID Šrot, Žiga (Author)
ID Simonič, Marjana (Mentor) More about this mentor... New window
ID Volmajer Valh, Julija (Comentor)
ID Turel, Matejka (Comentor)
Files:.pdf MAG_Srot_Ziga_2023.pdf (4,30 MB)
MD5: 23001E3EEA03A5DF34193C9B7D09CB71
 
Language:Slovenian
Work type:Master's thesis/paper
Typology:2.09 - Master's Thesis
Organization:FKKT - Faculty of Chemistry and Chemical Engineering
Abstract: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 %.
Keywords:biorazgradnja, kompostiranje, mikrokristalna celuloza, zaščitne maske, FTIR spektoskopija, respirometrija.
Place of publishing:Maribor
Place of performance:Maribor
Publisher:[Ž. Šrot]
Year of publishing:2023
Number of pages:1 spletni vir (1 datoteka PDF (XI, 52 f.))
PID:20.500.12556/DKUM-83927 New window
UDC:628.473.6.046(043.2)
COBISS.SI-ID:148503811 New window
Publication date in DKUM:05.04.2023
Views:601
Downloads:82
Metadata:XML DC-XML DC-RDF
Categories:KTFMB - FKKT
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Licences

License:CC BY-NC-ND 4.0, Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
Link:http://creativecommons.org/licenses/by-nc-nd/4.0/
Description:The most restrictive Creative Commons license. This only allows people to download and share the work for no commercial gain and for no other purposes.
Licensing start date:13.03.2023

Secondary language

Language:English
Title:Study of biodegradation of protective masks ( covid-19) based on respirometric measurments in compost
Abstract: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%.
Keywords:biodegradation, composting, protective facemasks, microcrystalline cellulose, FTIR spectroscopy, respirometry.


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