Impact of temperature and humic acid-assisted synthesis on selenium sorption onto iron oxide nanoparticles
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21340%2F25%3A00385242" target="_blank" >RIV/68407700:21340/25:00385242 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1016/j.jwpe.2025.108119" target="_blank" >https://doi.org/10.1016/j.jwpe.2025.108119</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.jwpe.2025.108119" target="_blank" >10.1016/j.jwpe.2025.108119</a>
Alternative languages
Result language
angličtina
Original language name
Impact of temperature and humic acid-assisted synthesis on selenium sorption onto iron oxide nanoparticles
Original language description
Selenium is a key element for biological systems, but at elevated concentrations it can pose a risk to both the environment and human health. Therefore, developing effective strategies to limit its mobility is crucial. Here, we investigated the immobilization of selenite and selenate using iron-based magnetic adsorbents synthesized at various temperatures in the presence of humic acids (HA). Mo<spacing diaeresis>ssbauer spectrometry confirmed the presence of both (minor) magnetite and (major) maghemite components in the adsorbents. HA decreased the overall surface charge and size of the nanoparticles. Kinetic analysis revealed rapid and efficient removal of both species by the synthesized adsorbents at pH 3. The process was best described by pseudo-nth order kinetic model for selenite, whereas the kinetic data for selenate were inconclusive. This suggests a complex interaction between selenite and the adsorbent surfaces that cannot be adequately described by first- or second-order reaction kinetics since the sorption likely involved reductive immobilization, as evidenced by the presence of elemental selenium on the adsorbent surfaces, as revealed by X-ray photoelectron spectroscopy. Selenite sorption showed maximum capacity for adsorbents synthesized at 60 degrees C, without HA at 539.5 mu mol center dot g- 1 and with HA at 528.4 mu mol center dot g- 1. The highest maximum sorption capacity of selenate was observed for materials synthesized without HA at 30 degrees C at 340.9 mu mol center dot g- 1. Desorption experiments demonstrated high regeneration efficiency for sorbents synthesized at lower temperatures, with desorption rates reaching up to 92 %. However, the presence of HA significantly reduced desorption efficiency, though this effect diminished as the synthesis temperature increased.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10301 - Atomic, molecular and chemical physics (physics of atoms and molecules including collision, interaction with radiation, magnetic resonances, Mössbauer effect)
Result continuities
Project
<a href="/en/project/LM2023073" target="_blank" >LM2023073: The VR-1 Nuclear Experimental Hub</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Journal of Water Process Engineering
ISSN
2214-7144
e-ISSN
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Volume of the periodical
76
Issue of the periodical within the volume
August
Country of publishing house
IE - IRELAND
Number of pages
18
Pages from-to
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UT code for WoS article
001517051100001
EID of the result in the Scopus database
2-s2.0-105008103804