Microalgae-derived nanoporous biochar for ammonia removal in sustainable wastewater treatment
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F86652079%3A_____%2F22%3A00563534" target="_blank" >RIV/86652079:_____/22:00563534 - isvavai.cz</a>
Alternative codes found
RIV/00216305:26620/22:PU147106
Result on the web
<a href="https://www.sciencedirect.com/science/article/pii/S2213343722013872?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S2213343722013872?via%3Dihub</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.jece.2022.108514" target="_blank" >10.1016/j.jece.2022.108514</a>
Alternative languages
Result language
angličtina
Original language name
Microalgae-derived nanoporous biochar for ammonia removal in sustainable wastewater treatment
Original language description
Ammonia is a critical pollutant in biological wastewater and is not easily separated mechanically due to similar physical properties (e.g., molecular weight, polarity, etc.) to water. Currently, an agent for ammonia removal from wastewater using zeolites must be mined, which is not environmental-friendly. The development of a sustainable and biological absorbent for ammonia-containing wastewater is therefore desirable. Since microalgae can grow rapidly by feeding on waste nutrients in wastewater and up-taking carbon dioxide flue gas, it is of high interest to be used as a bio-absorbent for secondary wastewater treatment. The problem statement of this work is to explore and understand the use of microalgae as a biological source for effective ammonia absorbent. In this work, nanoporous microalgae biochar (NP-MBC) is proposed to be synthesized by using formaldehyde-stabilized hydrothermal and KOH-activated high-temperature pyrolysis. The novelty of this work is that the mechanism for NP-MBC ammonia removal is being uncovered via spectroscopic and sorption analysis. Formaldehyde-stabilization maintains the morphology of the microalgae particles for higher quality pore formation during pyrolysis. Pyrolysis temperatures up to 700 degrees C improve pore structure and surface chemistry of the NP-MBC, leading to a specific surface area of 1137 m(2).g(-1) and increased activation of COO- groups for ammonia adsorption. Further pyrolysis at 800 degrees C damages the textual characteristics of the synthesized NP-MBC, causing pores agglomeration and lower ammonia adsorption. The best ammonia adsorption performance was obtained on NP-MBC prepared by pyrolysis at 700 degrees C with maximum ammonia removal of 72 % (within 120 min) and adsorption capacity over 69 mg.g(-1). Nanoporous structure by stabilized hydrothermal treatment and high-temperature pyrolysis are interesting as a paradigm to convert particulate biomass feedstock to functional material with tunable properties.
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
10606 - Microbiology
Result continuities
Project
Result was created during the realization of more than one project. More information in the Projects tab.
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
Journal of Environmental Chemical Engineering
ISSN
2213-3437
e-ISSN
2213-3437
Volume of the periodical
10
Issue of the periodical within the volume
6
Country of publishing house
GB - UNITED KINGDOM
Number of pages
15
Pages from-to
108514
UT code for WoS article
000870232900004
EID of the result in the Scopus database
2-s2.0-85138335022