magistrsko delo
Jaša Hrovat (Author), Andraž Šuligoj (Mentor), Franc Požgan (Thesis defence commission member), Nataša Novak Tušar (Thesis defence commission member)

Abstract

Bisfenoli so v zadnjem času v okolju precej razširjena organska onesnaževala. To je med drugim posledica prekomerne uporabe plastike v preteklih desetletjih. Uporaba bisfenola A (BPA) se omejuje zaradi njegove toksičnosti in nevarnosti ob daljšem času izpostavljenosti. Kljub temu so zaznane koncentracije v okolju le-tega še vedno visoke. Poleg tega so v okolju zaznane tudi visoke koncentracije strukturnih analogov BPA. Za odstranjevanje organskih onesnaževal v vodi je bilo razvitih že precej tehnik. V sklopu magistrskega dela sem preizkusil delovanje sklopljenega sistema fotokatalize s kavitacijo, za razgradnjo BPA in njegovih štirih strukturnih analogov Bisfenol-AF (BPAF), Bisfenol-F (BPF), Bisfenol-S (BPS) ter Tetrametil bisfenol-F (TMBPF). Ker smo pričakovali, da na potek razgradnje vpliva tudi vodni vzorec, so bili eksperimenti izvedeni v pitni ter očiščeni odpadni vodi odvzeti na iztoku iz čistilne naprave Domžale. Ob tem je pomembno analizirati fotokatalizator pred in po uporabi. Fotokatalizator je za dolgotrajno uporabo primeren le, če se tekom delovanja ne spremeni. To sem potrdil z več metodami kot so rentgenska praškovna difrakcija, dušikova fizisorpcija ter rentgenska fotoelektronska spektroskopija in ostale navedene v tem delu. Ugotovil sem, da razgradnja bisfenolov poteka mnogo lažje v pitni vodi kot očiščeni odpadni vodi. Razlog je verjetno v količini drugih organskih onesnaževal, ki so poleg bisfenolov v vodi še prisotne. Ugotovil sem tudi, da bi s povečanjem časa delovanja fotokatalize sklopljene s kavitacijo lahko odstranili večjo količino bisfenolov iz vode.

Keywords

bisfenoli;odstranjevanje bisfenolov;fotokatalizatorji;napredni oksidacijski procesi;magistrska dela;

Data

Language: Slovenian
Year of publishing:
Typology: 2.09 - Master's Thesis
Organization: UL FKKT - Faculty of Chemistry and Chemical Technology
Publisher: [J. Hrovat]
UDC: 544.526.5:532.528(043.2)
COBISS: 239265795 Link will open in a new window
Views: 146
Downloads: 45
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Other data

Secondary language: English
Secondary title: Photocatalytic oxidation in combination with cavitation for removal of bisphenols in water
Secondary abstract: Bisphenols have recently become quite widespread organic pollutants in the environment. This is, among other things, the result of the excessive use of plastic in the past decades. The use of bisphenol A (BPA) is being restricted due to its toxicity and the dangers of prolonged exposure. Nevertheless, the concentrations detected in the environment are still high. In addition, high concentrations of structural analogues of BPA have also been detected in the environment. Many techniques have already been developed for the removal of pollutants in water. As part of my master's thesis, I tested the operation of a coupled photocatalysis system with cavitation for the degradation of BPA and its four structural analogues Bisphenol-AF (BPAF), Bisphenol-F (BPF), Bisphenol-S (BPS) and Tetramethyl bisphenol-F (TMBPF). Since we expected that the degradation process would also be affected by the water sample, the experiments were performed in drinking and treated wastewater taken at the outlet of the Domžale wastewater treatment plant. It is important to analyze the photocatalyst before and after use. The photocatalyst is suitable for long-term use only if it does not change during operation. I confirmed this with several methods such as X-ray powder diffraction, nitrogen physisorption and X-ray photoelectron spectroscopy and others listed in this work. It has been shown that the degradation of bisphenols takes place much more easily in drinking water than in treated wastewater. The reason is probably the amount of other organic pollutants that are present in the water in addition to bisphenols. I also found that by increasing the operating time of photocatalysis coupled with cavitation, a larger amount of bisphenols could be removed from the water.
Secondary keywords: water;organic pollutants;photocatalysis;cavitation;bisphenols;Voda;Organski onesnaževalci;Fotokataliza;Kavitacija (hidrodinamika);Univerzitetna in visokošolska dela;
Type (COBISS): Master's thesis/paper
Study programme: 1000375
Thesis comment: Univ. v Ljubljani, Fak. za kemijo in kemijsko tehnologijo, smer Kemija
Pages: 1 spletni vir (1 datoteka PDF (68 str.))
ID: 26571549