Engineered biochar as a tool for nitrogen pollutants removal: preparation, characterization and sorption study
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21340%2F20%3A00342752" target="_blank" >RIV/68407700:21340/20:00342752 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.5004/dwt.2020.25750" target="_blank" >https://doi.org/10.5004/dwt.2020.25750</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.5004/dwt.2020.25750" target="_blank" >10.5004/dwt.2020.25750</a>
Alternative languages
Result language
angličtina
Original language name
Engineered biochar as a tool for nitrogen pollutants removal: preparation, characterization and sorption study
Original language description
In this study, engineered (chemically modified) biochars (pyrolyzed bamboo biomass) were used for the removal of oxidized and reduced nitrogen species from an aqueous solution. The physico-chemical properties of the prepared materials, such as surface functional groups, elemental composition, morphology, and specific surface area were investigated. The biochar surfaces were covered with Mg and Fe particles. The particles containing Mg and Fe species were observed in the form of nano-flakes within the biochar matrix. The efficiency of nitrate and ammonium removal was examined by sorption studies. The experimental data were fitted with sorption isotherms (Langmuir, Freundlich, and Dubinin–Raduskievich) and with kinetic models. The obtained data presented a higher sorption capacity for nitrate removal in the case of the engineered Fe-biochar and the engineered Mg-biochar compared to unmodified bamboo-based biochar. The maximum sorption capacity of modified samples decreased in the order Fe-biochar (Q = 10.35 mg g–1), Mg-biochar (Q = 9.13 mg g–1), and the lowest capacity was found in the unmodified biochar (Q = 4.41 mg g–1). In the case of ammo- nium removal, unmodified biochar with maximum sorption capacity (Q = 12.60 mg g–1), was more efficient than Fe-(Q = 5.66 mg g–1), and Mg-engineered biochars (Q = 3.23 mg g–1). The pseudo-second-order kinetic model and Langmuir isotherm model proved to be the most appropriate for the experimental sorption data. In addition, engineered Fe-biochar presented magnetic properties due to the presence of Fe2O3 and therefore, may be easily separated from the reaction mixtures.
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
10400 - Chemical sciences
Result continuities
Project
<a href="/en/project/EF16_019%2F0000728" target="_blank" >EF16_019/0000728: Ultra-trace isotope research in social and environmental studies using accelerator mass spectrometry</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2020
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Desalination and Water Treatment
ISSN
1944-3994
e-ISSN
1944-3986
Volume of the periodical
191
Issue of the periodical within the volume
July
Country of publishing house
GB - UNITED KINGDOM
Number of pages
14
Pages from-to
318-331
UT code for WoS article
000548535500032
EID of the result in the Scopus database
2-s2.0-85098542280