One-step microwave synthesis of magnetic biochars with sorption properties
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F18%3A73589867" target="_blank" >RIV/61989592:15310/18:73589867 - isvavai.cz</a>
Result on the web
<a href="http://koreascience.or.kr/article/JAKO201814446220726.page" target="_blank" >http://koreascience.or.kr/article/JAKO201814446220726.page</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.5714/CL.2018.26.031" target="_blank" >10.5714/CL.2018.26.031</a>
Alternative languages
Result language
angličtina
Original language name
One-step microwave synthesis of magnetic biochars with sorption properties
Original language description
Adsorption is one of the best methods for wastewater purification. The fact that water quality is continuously decreasing requires the development of novel, effective and cost available adsorbents. Herein, a simple procedure for the preparation of a magnetic adsorbent from agricultural waste biomass and ferrofluid has been introduced. Specifically, ferrofluid mixed with wheat straw was directly pyrolyzed either by microwave irradiation (900 W, 30 min) or by conventional heating (550∘C, 90 min). Magnetic biochars were characterized by X-ray powder diffraction, Mössbauer spectroscopy, textural analysis and tested as adsorbents of As(V) oxyanion and cationic methylene blue, respectively. Results showed that microwave pyrolysis produced char with high adsorption capacity of As(V) (Qm=25.6mgg−1 at pH 4), whereas conventional pyrolysis was not so effective. In comparison to conventional pyrolysis, one-step microwave pyrolysis produced a material with expressive microporosity, having a nine times higher value of specific surface area as well as total pore volume. We assumed that sorption properties are also caused by several iron-bearing composites identified by Mössbauer spectroscopy ([super] paramagnetic Fe2O3, α−Fe, non-stoichiometric Fe3C, γ−Fe2O3, γ−Fe) transformed from nano-maghemite presented in the ferrofluid. Methylene blue was also more easily removed by magnetic biochar prepared by microwaves (Qm=144.9mgg−1 at pH 10.9) compared to using conventional techniques.
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
21001 - Nano-materials (production and properties)
Result continuities
Project
—
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2018
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Carbon Letters
ISSN
1976-4251
e-ISSN
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Volume of the periodical
26
Issue of the periodical within the volume
APR
Country of publishing house
KR - KOREA, REPUBLIC OF
Number of pages
12
Pages from-to
31-42
UT code for WoS article
000436268400005
EID of the result in the Scopus database
2-s2.0-85046452259