A novel treatment of biogas digestate waste for biochar production and its adsorption of methylene blue and malachite green in a binary system
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60460709%3A41210%2F25%3A102699" target="_blank" >RIV/60460709:41210/25:102699 - isvavai.cz</a>
Alternative codes found
RIV/60460709:41340/25:102699
Result on the web
<a href="https://scijournals.onlinelibrary.wiley.com/doi/10.1002/bbb.2772" target="_blank" >https://scijournals.onlinelibrary.wiley.com/doi/10.1002/bbb.2772</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1002/bbb.2772" target="_blank" >10.1002/bbb.2772</a>
Alternative languages
Result language
angličtina
Original language name
A novel treatment of biogas digestate waste for biochar production and its adsorption of methylene blue and malachite green in a binary system
Original language description
This study presents a novel treatment of biogas digestate to produce biochar at processing temperatures of 500–700 °C. The resulting biochar was applied for the simultaneous removal of methylene blue (MB) and malachite green (MG) in a binary system. Characterization included metal element analysis, nitrogen adsorption/desorption isotherms, energy-dispersive X-ray spectroscopy with elemental mapping, scanning electron microscopy, and X-ray diffraction. The biochar exhibited a high surface area with a porous structure ranging from 1 to 20 µm in diameter. Due to spectral overlap between the dyes, a principal component multivariate regression-assisted spectrophotometric method was developed for their simultaneous determination in aqueous solution. Equilibrium data for the single-component systems were evaluated using the Langmuir, Freundlich, and Sips isotherm models, with the Langmuir model providing the best fit. For the two-component system, adsorption data were analyzed using the extended Langmuir (EL) model, the P-factor model, and three combination models based on ideal adsorbed solution theory (IAST): IAST-L (derived from the Langmuir isotherm), IAST-F (from the Freundlich isotherm), and IAST-S (from the Sips isotherm). The results showed that the simultaneous adsorption of MB and MG onto biogas digestate biochar (BDB) at 600 °C was best described by the IAST-L and IAST-F models. The maximum adsorption capacities in the single/binary systems, based on the Langmuir and IAST-L models, were approximately 0.136/0.103 for MG and 0.32/0.24 for MB at 303 K. A thermodynamic analysis was also conducted. The desorption of MG and MB by BDB at 600 °C (BDB-600) with methanol solvent exceeded 86% and 90% in the first adsorption/desorption cycle and did not decrease significantly after three cycles. The results of this research open up a new recycling route for the disposal of biogas digestate waste and its application as a sustainable alternative for the simultaneous removal of dyes.
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
10511 - Environmental sciences (social aspects to be 5.7)
Result continuities
Project
<a href="/en/project/TH79020003" target="_blank" >TH79020003: Phosphogypsum Processing to Critical Raw Materials</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach
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
Biofuels Bioproducts & Biorefining-Biofpr
ISSN
1932-104X
e-ISSN
1932-104X
Volume of the periodical
19
Issue of the periodical within the volume
6
Country of publishing house
CZ - CZECH REPUBLIC
Number of pages
18
Pages from-to
1728-1745
UT code for WoS article
001478501100001
EID of the result in the Scopus database
2-s2.0-105004319134