@conference{
author = "Stojanović, Jevrem and Zalewski, Przemysław and Otašević, Biljana and Zečević, Mira and Malenović, Anđelija and Janošević-Ležaić, Aleksandra and Ranđelović, Dragana and Protić, Ana",
year = "2023",
abstract = "In the last two decades, there has been a growing awareness of the presence of pharmaceuticals in the aquatic
environment. Antibiotics are particularly alarming because their occurrence may result in increased antibiotic
resistance. Difficulties in sample preparation and removal of low concentrations of pharmaceuticals from
environmental water could be overcome by their adsorption onto novel, non-polluting, and inexpensive
materials.
In this study, biochar prepared by pirolysis of biomass at 500°C (BC500) and 800°C (BC800) and activated
carbon prepared upon treatment with ZnCl2 at 800°C (AC800) were evaluated as potential adsorbents. Ailanthus
altissima was selected as a source of raw material, leaf, because it is a widespread invasive tree that negatively
affects biodiversity. Tetracycline hydrochloride was selected as a model substance, since it is an antibiotic
widely present in environmental water. Central composite design was employed to simultaneously investigate
the effects of adsorbate solution pH, ionic strength (KCl concentration), and adsorbent mass on removal
efficiency of all three adsorbents, and to find optimal conditions for studying adsorption kinetics and equilibrium
on the most promising adsorbent. The removal efficiency and adsorbed mass were calculated from the HPLC UV determined concentration of tetracycline post-adsorption.
Under optimal conditions (10.18 mg of adsorbent, pH 4.42, and ionic strength 165mM), AC800 showed the
highest affinity for tetracycline, i.e. 38.22% removal and adsorbed mass of 56.32 mg g-1 compared to 14.57%
and 21.48 mg g-1 (BC500) and 18.82% and 27.73 mg g-1 (BC800). Removal efficiency of AC800 was strongly
influenced by the adsorbent mass and solution pH. The kinetics study showed a rapid adsorption process
(equilibrium attained in 120 minutes), while equilibrium studies revealed a high adsorption capacity for
tetracycline (131.55 mg g-1). AC800 has been shown to be a promising novel drug adsorbent and should be
further tested for its suitability in water treatment and sample preparation.",
publisher = "Uniwersytet Medyczny im. K. Marcinkowskiego w Poznaniu, Polskie Towarzystwo Farmaceutyczne, Stowarzyszenie Stop Nielegalnym Farmaceutykom",
journal = "IV Poznańska Konferencja Naukowo – Szkoleniowej - „Modern pharmaceutical and biomedical analytics in health care”",
title = "Adsorption of pharmaceuticals by novel carbonaceous materials from the leaves of Ailanthus altissima (Mill.) Swingle - Case study on the adsorption of tetracycline",
pages = "64-64",
url = "https://hdl.handle.net/21.15107/rcub_farfar_5479"
}
