DEZINFEKCIJA ODPADNE VODE Z UPORABO POROZNEGA Fe2O3 TANKO PLASTNEGA FILMA

The contamination of water bodies by microorganisms is seen as a highly significant issue that poses a threat to human and animal well-being. The primary objective of this master thesis is to develop and evaluate an environmentally friendly photoelectrochemical (PEC) method using porous Fe₂O₃ thin films for the disinfection of wastewater. This thesis presents the novel application of porous Fe₂O₃ thin films, which were produced using a cost-effective spin-coating technique, to improve the process of PEC disinfection. The PEC approach has been demonstrated to be highly effective in disinfection of wastewaters deliberately contaminated with E. coli bacteria. The crystallinity of the Fe₂O₃ porous thin films was confirmed using X-ray diffraction (XRD), while the film morphology was studied using scanning electron microscopy (SEM). The PEC disinfection procedures were conducted in the presence of two separate electrolytes, sodium sulfite (Na₂SO₃) and sodium chloride (NaCl), which were chosen for their specific roles in improving the effectiveness of disinfection. The PEC method shown efficacy in inactivating E. coli, with 45% of the bacteria being inactivated in the presence of 2 mM Na₂SO₃ and complete inactivation achieved with 20 mM NaCl. The findings suggest that the PEC disinfection process is a highly efficient and eco-friendly technology that can be used as a practical substitute for traditional disinfection methods. As a result, it has potential applications in ensuring public safety and safeguarding the environment, particularly in relation to wastewater treatment.Onesnaženje voda z mikroorganizmi je zelo pomemben problem, ki ogroža zdravje ljudi in živali. Glavni cilj te magistrske naloge je razvoj in vrednotenje okolju prijazne fotoelektrokemijske (PEC) metode z uporabo poroznih tankih filmov Fe₂O₃ za dezinfekcijo odpadnih voda. Magistrsko delo predstavlja nov pristop k uporabi poroznih Fe₂O₃ tankih plasti za izboljšanje postopka PEC dezinfekcije. Postopek PEC je zelo učinkovit pri dezinfekciji odpadnih voda, ki so bile namerno kontaminirane z bakterijami E. coli. Kristalnost poroznih Fe₂O₃ tankih plasti je bila potrjena z rentgensko difrakcijo (XRD). Morfologija plasti je bila preučena z vrstično elektronsko mikroskopijo (SEM). Postopki PEC dezinfekcije so bili izvedeni v prisotnosti dveh ločenih elektrolitov, natrijevega sulfita (Na₂SO₃) in natrijevega klorida (NaCl), ki so bili izbrani zaradi svojih specifičnih vlog pri izboljšanju učinkovitosti dezinfekcije. Metoda PEC se je izkazala za učinkovito pri inaktivaciji E. coli, pri čemer je bilo 45% bakterij inaktiviranih v prisotnosti 2 mM Na₂SO₃, popolna inaktivacija pa je bila dosežena z 20 mM NaCl. Ugotovitve nakazujejo, da je postopek PEC dezinfekcije zelo učinkovita in okolju prijazna tehnologija, ki jo je mogoče uporabiti kot praktično alternativo tradicionalnim metodam dezinfekcije. Zaradi tega ima potencialne aplikacije pri zagotavljanju javne varnosti in zaščiti okolja, zlasti pri obdelavi odpadnih voda

The CUBOT project: from concept to creation

Designing a Small, Simple, 3D Printed, Inexpensive Rubik\u27s Cube Solver Robo