Naslov
Investigation of pesticides interaction with UV- aged polypropylene microplastics: Mechanism and toxicity studies

Autori
Pitner, Ana-Marija ; Viljevac, Matej ; Tonković, Stefani ; Pulitika Anamarija ; Papac, Josipa ; Hrnjak Murgić, Zlata ; Lončarić Božić, Ana

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Skup
2. međunarodna studentska GREEN konferencija = 2nd International Students’ GREEN Conference (ISC GREEN 2022)

Mjesto i datum
Osijek, Hrvatska, 02.06.2022. - 03.06.2022

Vrsta sudjelovanja
Poster

Vrsta recenzije
Domaća recenzija

Ključne riječi
Microplastics ; Pesticides ; DFT ; Adsorption ; Toxicity

Sažetak
Microplastics (MPs) are polymer particles smaller than 5 mm, and due to their potentially harmful effects on the environment are considered a global threat. MPs have a large specific surface area, and the most common sorption mechanism of organic pollutants is hydrophobic. The aim of this work was to establish the correlation between the properties of MPs and the adsorption capacity for the investigated pollutants as well as toxicity effects on tested organisms. For that purpose, we investigated the interactions of pristine and UV- aged polypropylene (PP) MPs with pesticide simazine (SMZ). The concentration of the pesticides was monitored by High-Performance Liquid Chromatography coupled with Photodiode Array Detector. Density functional theory (DFT) was applied for the investigation of the interaction energies in order to clarify the nature of the adsorption and the bonding types. Aquatic toxicity was assessed by exposing the MPs samples to crustacean Daphnia magna according to the standard procedure ISO 6341:2012. The adsorption isotherms of SMZ on PP showed the best fit for the Langmuir model which implies a monolayered adsorption process. Aquatic toxicity effects were enhanced in the case of UV-aged MPs, which is noticed as an increase in the dilution factor of such samples.

Izvorni jezik
Engleski

Znanstvena područja
Kemija, Kemijsko inženjerstvo, Interdisciplinarne tehničke znanosti

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