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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

  • Czech description

Classification

  • Type

    J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database

  • CEP classification

  • 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