Potential of bioash for removal of the herbicide terbuthylazine from the aquatic matrix

diplomski rad

• Autor: Gracijela Maltašić
• Mentor: Gabrijel Ondrašek (mentor)
• Mentor: Sanja Stipičević (komentor)
• Član povjerenstva: Gabrijel Ondrašek (predsjednik povjerenstva)
• Član povjerenstva: Klara Barić (član povjerenstva)
• Član povjerenstva: Sanja Stipičević (član povjerenstva)
• Ustanova koja je dodijelila akademski / stručni stupanj: Sveučilište u Zagrebu; Agronomski fakultet; (Melioracije); Zagreb
• Datum i država obrane: 2021-09-30, Hrvatska
• Znanstveno / umjetničko područje, polje i grana: BIOTEHNIČKE ZNANOSTI; Poljoprivreda (agronomija)

Sažetak

Terbuthylazine (TBA) is one of the most used herbicides in agriculture, forestry, and
transportation sectors, particularly since 2007 when widely used atrazine has been banned.
Soon after its pre-emergence application, TBA residues can be spread from soil to the entire
aquatic environment. Biodegradation of TBA in the soil is much faster than its abiotic
degradation in water, where it is proved to be relatively persistent and harmful to a range of
aquatic organisms. Therefore, the efficiency of fly ash (FA)-treatment of watercourse samples
fortified with TBA was tested in laboratory conditions. Deciduous hardwood-derived FA was
produced in a cogeneration plant facility and subjected to in-depth characterization using
SEM and XRD methods. The results showed that the addition of 1% (w/v) of the finest FA
fraction, with a nano-to-micro-sized structure and alkaline Ca/Mg/Si-enriched mineralogy,
can reduce the TBA half-life in the watercourse sample by more than 30-fold. The TBA
dissipation in FA-amended water was well described with the first-order kinetics (R²>0.98).
TBA and its environmentally relevant degradation product desethylterbuthylazine (DET)
were not detected in the water sample 48 hours after the FA addition, whereas nearly 80% of
TBA was found in the untreated sample. The XPS analysis of post-treated FA suggested a
plausible involvement of O, Ca, K, Mg, and Si in TBA adsorption. A basis for the
development of innovative FA-based polymers targeted to decontamination aquatic
ecosystems loaded with TBA and other hazardous (agro)chemicals were proposed.

• Ključne riječi: Terbuthylazine; Surface water; Wood biomass; Fly ash; Dissipation
• Jezik: engleski
• URN:NBN: urn:nbn:hr:204:383946
• Studijski program: Naziv: Environment, Agriculture and Resource Management; Vrsta studija: sveučilišni; Stupanj studija: diplomski; Akademski / stručni naziv: Master of Engineering in Agriculture (mag. ing. agr.)
• Vrsta resursa: Tekst
• Način izrade datoteke: Izvorno digitalna
• Prava pristupa: Otvoreni pristup
• Datum i vrijeme pohrane: 2022-02-01 12:56:36