Uklanjanje memantina iz vode uz pomoć TiO2-SnS2 nanokompozitnih fotokatalizatora

undergraduate thesis

• Title (english): Removal of memantine from water using TiO2-SnS2 nanocomposite photocatalysts
• Author: Dora Crmarić
• Mentor: Hrvoje Kušić (mentor)
• Committee member: Hrvoje Kušić (predsjednik povjerenstva)
• Committee member: Ana Lončarić Božić (član povjerenstva)
• Committee member: Šime Ukić (član povjerenstva)
• Granter: University of Zagreb; Faculty of Chemical Engineering and Technology; Zagreb
• Defense date and country: 2018-09-05, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Chemical Engineering; Environmental Protection in Chemical Engineering

Abstract

Rast populacije i globalni razvoj rezultiraju sve većim onečišćenjem vodnog okoliša. Veliku opasnost predstavljaju farmaceutska mikroonečišćivala koja su detektirana u otpadnim i pitkim vodama. Među njima potencijalno pripada i memantin, lijek za ublažavanje simptoma Alzheimerove i Parkinsonove bolesti. Memantin iz ljudskog organizma dospijeva u okoliš gotovo nepromijenjen. Veoma je postojan u okolišu i ne podliježe fotolizi izazvanoj direktnim Sunčevim zračenjem. Teško ga je detektirati i ukloniti iz vode, stoga se okreće novim tehnologijama. U ovom radu ispitivana je učinkovitost fotokatalitičkih procesa u razgradnji memantina uz simulirano Sunčevo zračenje. Korišten je nanokompozitni TiO2-SnS2 fotokatalizator te H2O2 kao oksidans. Pomoću statističkog planiranja eksperimenta i metode odzivnih površina ispitivani su utjecaji pH i koncentracije H2O2 na proces fotokatalitičke razgradnje memantina TiO2-SnS2 fotokatalizatorom. Analiza varijance pokazala je kako parametar pH nije signifikantan u procesu te nema značajan utjecaj na djelovanje H2O2 u sustavu dok parametar međudjelovanja pH i H2O2 ima značajan utjecaj na djelovanje SnS2 u procesu. Nije uočena adsorpcija mamentina na površinu fotokatalizatora. Najveća fotokatalitička aktivnost ostvarena je pri najmanjem udjelu SnS2 u kompozitu. Optimalni uvjeti ispitivanog procesa su pH = 6,74, [H2O2] = 4,33 mM te w(SnS2) = 5%, pri čemu ostvarena razgradnja memantina nakon 60 minuta provedbe procesa iznosi 37%.

Abstract (english)

The population growth and global development are resulting in an increase in pollution of the water environment. Pharmaceutical micropollutants which are detected in waste water and drinking water present a great jeopardy. Among them is memantine, a medicine used for easing the symptoms of Alzheimer's disease. Memantine is virtually unmodified in the human organism thereby being released unchanged into the environment. It is very environmentally stable and resistant to photolysis caused by direct solar irradiation. Memantine is difficult to detect and remove from the water so it is necessary to develop new methods. This study questions the efficiency of advanced oxidation processes, specifically photocatalytical processes in memantine removal with simulated Sun irradiation using a TiO2-SnS2 photocatalyst and H2O2 as oxidant. With the help of statistical experimental planning the response surface methodology, the influences of pH and H2O2 were investigated. The value of pH is not a significant parameter in the process and does not have a significant influence on the action of H2O2 in the photocatalytic degradation of memantine by TiO2-SnS2 photocatalyst, while the interaction parameter for pH and H2O2 has a significant influence on the action of SnS2 in the process. The adsorption of memantine on the surface of photocatalyst has not been observed. The largest photocatalytic activity has been achieved with the smallest percentage of SnS2 in the composite. The optimal process conditions are pH = 6.74, [H2O2] = 4.33 mM and w(SnS2) = 5%, achieving 37% of memantine degradation after 60 minutes of solar photocatalytic treatment.

• Keywords: farmaceutska mikroonečišćivala; memantin; napredni oksidacijski procesi; fotokatalizator; TiO2-SnS2
• Keywords (english): pharmaceutical micropollutants; memantine; advanced oxidation processes; photocatalyst; TiO2-SnS2
• Language: croatian
• URN:NBN: urn:nbn:hr:149:790247
• Study programme: Title: Chemical Engineering - Undergraduate study; Study programme type: university; Study level: undergraduate; Academic / professional title: sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka kemijskog inženjerstva (sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka kemijskog inženjerstva)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Closed access
• Created on: 2021-06-24 10:18:01