Naslov
Characterization of iron nanoparticles in removal of selected rare earth elements by ICP-MS, AFM and SEM methods

Autori
Beljan, Nikolina ; Starešinčić, Valentina ; Rončević, Sanda

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

Izvornik
Book of abstracts of the 19th European Winter Conference on Plasma Spectrochemistry / Šelih, Vid Simon ; Šala, Martin - Ljubljana : National Institute of Chemistry Ljubljana, 2023, 178-178

ISBN
978-961-6104-85-2

Skup
European Winter Conference on Plasma Spectrochemistry

Mjesto i datum
Ljubljana, Slovenija, 29.01.2023. - 03.02.2023

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
iron nanoparticles, adsorption, REEs, ICP-MS, characterization, AFM, SEM

Sažetak
Over the last decade, zero-valent iron nanoparticles (nZVI) have been the focus of researches in removal of natural water and soil contaminants. Because of their specific surface properties and high reactivity, nanoparticles (NPs) are more efficient in adsorption and reduction mechanisms than iron powder of standard micrometre size. However, nanoparticles tend to oxidize and therefore, their stabilization by surface modifications are widely studied. Chemical modification can improve the dispersion of nanoparticles and their surface activity. Furthermore, modification can enhance mechanical and physiochemical properties of nanoparticles.1 Nanoparticles are studied as an affordable and effective alternative for the removal of contaminants such as toxic metals, organics and microorganisms.2, 3 Technologically critical elements such as rare earth elements and actinides are widely used in modern technologies. Due to demanding production technologies and widespread use, these elements are often released in the environment. For this reason, it is quite important to find an effective method for their removal from aqueous systems. Novel approach in recycling of REEs includes the testing of new adsorbent materials such as zero valent iron nanoparticles. The aim of our study was to characterize bare zero- valent iron nanoparticles and nanoparticles modified with dipicolinic acid. Nanoparticles were synthetized using borohydride reduction of iron ions followed by addition of dipicolinic acid using different molar ratios. The adsorption efficiency of metal ions (Nd3+, Eu3+, Er3+, Gd3+, UO2(2+)) from aqueous solutions was monitored by inductively coupled plasma mass spectrometry (ICP-MS). Nanoparticles were characterized by structural analysis methods such as atomic force microscopy (AFM) and scanning electron microscopy (SEM-EDS). The obtained results show that chemical modification of nanoparticles and adsorption of selected ions on nanoparticles affect their size and structure.

Izvorni jezik
Engleski

Znanstvena područja
Kemija

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