The use of microwave irradiation for preparation and fast-acting regeneration of magnetic biochars
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F22%3A73613113" target="_blank" >RIV/61989592:15310/22:73613113 - isvavai.cz</a>
Result on the web
<a href="https://www.sciencedirect.com/science/article/pii/S0255270122002288" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0255270122002288</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.cep.2022.109016" target="_blank" >10.1016/j.cep.2022.109016</a>
Alternative languages
Result language
angličtina
Original language name
The use of microwave irradiation for preparation and fast-acting regeneration of magnetic biochars
Original language description
The application of microwave irradiation for rapid synthesis of magnetic biochar from agricultural waste with the subsequent modification of carbon matrix by magnetic nanoparticles was performed. The magnetic biochar was characterized by 57Fe Mössbauer spectroscopy, X-ray diffraction, a low-temperature nitrogen adsorption method, and electron microscopy. Except of magnetic properties, modification of biochar brings surface texture increase (SBET = 21.1 m2/g for char precursor versus 139.1 m2/g for magnetic biochar), and therefore better adsorption properties. The magnetic biochar was tested as an adsorbent of As5+ oxyanion and methylene blue (MB) to study the sorption mechanism and regeneration process. Magnetic biochar is the excellent adsorbent of arsenic (Qm = 24.9 mg/g; pH = 3.8). In the regeneration procedure, fast-acting microwave irradiation (10 s) significantly increases the value of the As5+ desorption rate constant as well as the initial desorption rate. The adsorption of MB on the magnetic biochar (Qm = 55.0 mg/g; pH = 10.2) was realized to study microwave-induced thermal regeneration. After short microwave treatment (30 s), a degradation of MB was observed (no absorption in the UV/VIS spectrum), whereas six degradation products were detected (HPLC/ESI-MS) and proposed formulas were revealed. Longer irradiation (60 s) caused total degradation of MB.
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
20501 - Materials engineering
Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2022
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
CHEMICAL ENGINEERING AND PROCESSING-PROCESS INTENSIFICATION
ISSN
0255-2701
e-ISSN
1873-3204
Volume of the periodical
178
Issue of the periodical within the volume
AUG
Country of publishing house
CH - SWITZERLAND
Number of pages
12
Pages from-to
"109016-1"-"109016-12"
UT code for WoS article
000817124700004
EID of the result in the Scopus database
2-s2.0-85132843324